Wire Harness Installation

Instructions
For Installing:

Part #10112
12 Circuit GM Truck Wiring Harness (1963-66 )

Manual #90519

Perfect Performance Products, LLC

Painless Performance Products Division
2501 Ludelle Street, Fort Worth, Texas 76105-1036
(800) 423-9696
We have attempted to provide you with as accurate instructions
as possible, and are always concerned about corrections or
improvements that can be made. If you have found any errors or
omissions, or if you simply have comments or suggestions
concerning these instructions, please write us at the address on
the cover and let us know about them. Or, better yet, send us a
fax at (817) 244-4024. We sincerely appreciate your business.

For Technical Questions

E-mail: tech@painlessperformance.com

Tech Line: 800-423-9696

Perfect Performance Products, LLC shall in no event be liable in

contract or tort (including negligence) for special, indirect,
incidental or consequential damages, such as, but not limited to,
loss of property damage, or any other damages, costs or expenses
which might be claimed as the result of the use or failure of the
goods sold hereby, except only the cost of repair or replacement.

P/N 90519 Painless Wiring Manual

July 2005

Copyright © 2001 by Perfect Performance Products, LLC

 TABLE OF CONTENTS

List of Figures.………………………………………………………………………… ii
List of Tables.…………………………………………………………………………. ii
List of Illustrations………………………………………………………………….. ii

1.0 Introduction…………………………………………………………………………………………………….. 1

2.0 About These Instructions…………………………………………………………………………………... 1

3.0 Contents Of The Painless Performance Wire Harness Kit (Part #10112)…………………. 2

4.0 Tools Needed…………………………………………………………………………………………………… 3

5.0 Pre-Installation and General Harness Routing Guidelines………………………………………. 3

6.0 General Harness Installation Instructions…………………………………………………………….. 4

6.1 Rough Installation…………………………………………………………………………………. 4
6.2 Harness Attachment………………………………………………………………………………. 5
6.3 Grounding The Automobile…………………………………………………………………….. 10
6.4 Terminal Installation and Making Connections………………………………………….. 10
6.5 Testing The System……………………………………………………………………………….. 12

7.0 Specific Circuit Connections………………………………………………………………………………… 12

7.1 Early GM Alternator (Before 1969) External Regulator……………………………….. 12
7.2 Late GM Alternator (After 1972) Internal Regulator…………………………………… 12
7.3 GM One-Wire Alternator…………………………………………………………………………. 12
7.4 High Output Alternator…………………………………………………………………………… 14
7.5 Connecting An Ammeter and Maxi-Fuse…………………………………………………… 14
7.6 Ignition (Start/Run) System……………………………………………………………………. 16
7.7 Steering Column, Turn Signal and Ignition Switch Connections………………….. 16
7.8 Headlight Section…………………………………………………………………………………... 18
7.9 Hood Section………………………………………………………………………………………… 19
7.10 Tail Section…………………………………………………………………………………………… 21
7.11 Engine Section A – Temperature Sending Unit………………………………………….. 23
7.12 Engine Section A – Electric Cooling Fans………………………………………………….. 23
7.13 Engine Section A – Oil Sending Unit………………………………………………………… 24
7.14 Instrument and Cab Wiring…………………………………………………………………….. 25
7.15 Windshield Wipers…………………………………………………………………………………. 25

8.0 Wire Connection Index and Fuse Requirements……………………………………………………. 27

i
 LIST OF FIGURES

Figure 3.1 The Painless Performance Wire Harness Kit (Part #10112)………………………. 2
Figure 6.1 Fuse Block – mounted………………………………………………………………………….. 6
Figure 6.2 Routing of Headlight, Hood and Engine Sections…………………………………….. 6
Figure 6.3 Routing of Tail Section…………………………………………………………………………. 7
Figure 6.4 Routing of Engine Section A Wires………………………………………………………… 7
Figure 6.5 Routing of Tail Lights…………………………………………………………………………… 8
Figure 6.6 Mounting Brackets Along The Frame for Tail Section Mounting………………… 8
Figure 6.7 Routing of Cab Section…………………………………………………………………………. 9
Figure 6.8 Mounting Clips on Seam Of The Fuel Tank……………………………………………… 9
Figure 6.9 Grounding Strap; Engine To Chassis………………………………………………………. 10
Figure 6.10 Strip and Crimp Your Wires…………………………………………………………………… 11
Figure 7.1 Early GM Alternator – External Regulator……………………………………………….. 13
Figure 7.2 Late GM Alternator – Internal Regulator………………………………………………… 13
Figure 7.3 GM One-wire Alternator……………………………………………………………………………… 14
Figure 7.4 High Amp Alternator (over 65 amps)……………………………………………………………… 15
Figure 7.5 Ammeter and Maxi-Fuse………………………………………………………………………. 15
Figure 7.6 Maxi-Fuse…………………………………………………………………………………………… 16
Figure 7.7 Original Connector………………………………………………………………………………. 17
Figure 7.8 Late Model Turn Signal and Ignition Connectors…………………………………….. 18
Figure 7.9 Headlight Section Wiring……………………………………………………………………… 19
Figure 7.10 Hood Section Wiring……………………………………………………………………………. 20
Figure 7.11 Turn Signal and Park Light……………………………………………………………………. 20
Figure 7.12 Turn Signal Spliced To Harness and Ready To Install……………………………… 21
Figure 7.13 Tail Lights and License Light………………………………………………………………… 22
Figure 7.14 Tail Lights Removed; Ready To Measure, Cut and Splice………………………… 22
Figure 7.15 License Light Spliced and Installed In Bumper……………………………………….. 23
Figure 7.16 Hot and Cold Sending Unit…………………………………………………………………… 24
Figure 7.17 Typical Fan Relay Installation………………………………………………………………. 24
Figure 7.18A ’64-’66 Headlight Switch…………………………………………………………………………… 26
Figure 7.18B ’63 Headlight Switch…………………………………………………………………………… 26
Figure 7.18C Turn Signal Diagram…………………………………………………………………………… 26
Figure 7.19 Wiper Motor………………………………………………………………………………………. 26
Figure 7.20 Engine Run On………………………………………………………………………………….. 31

LIST OF TABLES

Table 7.1 Original Turn Signal and Ignition Wiring…………………………………………………. 17

Table 7.2 Late Model Ignition and Turn Signal Wiring…………………………………………….. 18
Table 7.3 Tail Light Hook-Up.………………………………………………………………………………. 21
Table 7.4 Wiper Diagram…………………………………………………………………………………….. 27
Table 8.1 Fuse Requirements………………………………………………………………………………. 28
Table 8.2 Wire Connection Index (1 of 3)……………………………………………………………… 29
Table 8.2 Wire Connection Index (2 of 3)……………………………………………………………… 30
Table 8.2 Wire Connection Index (3 of 3)……………………………………………………………… 31

LIST OF ILLUSTRATIONS

Illustration 1 Template for Mounting Fuse Block…………………………………………………………. 32

ii
1.0 INTRODUCTION

You have purchased what we at Perfect Performance Products, LLC, believe to be the most up to date
and easiest to install automotive wire harness on the market. It is designed for easy installation, even if
you have no electrical experience.

All kits have a built in anti-theft feature. Remove the fuse labeled "coil" from the fuse block; this will
prevent the vehicle from starting.

The fuse block and fuses have been updated. The proper fuses and flashers have been pre-installed in
the fuse block. In addition, all wires have been color-coded and printed. This will help you to identify the
different circuits during installation and later if additions to the overall system are necessary. For fuse
specifications and color designations, see Section 8.0.

In addition, all of our kits have "accessory" terminals at the front of the fuse block for your convenience.
These terminals may be constantly hot or "switched" hot but all are fused.

This Painless Performance wire harness is designed to be used with a 1963-66 GM Pickup Truck. All of
the wire in this kit is 600 volt, 125˚ c, TXL. Standard automotive wire is 300 volt, 80˚c, GPT with PVC
insulation.

This complete automobile wiring system has been designed with three major groups incorporated into it:

ENGINE/HEADLIGHT GROUP Includes high beam low beam, park, right turn, electric fan,
horn, starter solenoid, battery feed, alternator, voltage regulator,
distributor, water temperature, oil pressure, and air conditioning.

DASH GROUP Includes wire to connect to indicator lights, and switches to their
proper sources. Also in the cab area we have dome light, and a
cab mounted fuel tank.

REAR LIGHT GROUP Includes taillights, right and left turn signals, brake light, and
frame mounted fuel tank.

2.0 ABOUT THESE INSTRUCTIONS

The contents of these instructions are divided into major Sections, as follows

1.0 Introduction
2.0 About These Instructions
3.0 Contents Of The Painless Performance Wire Harness Kit (Part #10112)
4.0 Tools Needed
5.0 Pre-Installation and General Harness Routing Guidelines
6.0 General Harness Installation Instructions
7.0 Specific Circuit Connection Details
8.0 Headlight and Hood Section
9.0 Tail Section Wiring
10.0 Engine Section "A"
11.0 Instrument and Cab Wiring
12.0 Wire Connection Index and Fuse Requirements

Sections are divided into subsections and Paragraphs. Throughout these instructions, the Figure
numbers refer to illustrations and the Table numbers refer to information in table form. These are
located in Section and Paragraphs corresponding to the number. Always pay special and careful attention
to any Notes, especially those in Tables, and any text marked CAUTION.

1
3.0 CONTENTS OF THE PAINLESS PERFORMANCE WIRE HARNESS KIT (PART #10112)

Refer to Figure 3-1 to take inventory. See that you have all the parts you are suppose to have in this
kit. If anything is missing, contact the dealer where you obtained the kit or Perfect Performance Products,
L.L.C. at (817) 244-6898. This wire harness kit should contain the following items:

A The main wire harness, with the fuse block wired in and fuses installed.
B Headlamp connector cables (x4)
C Maxi Fuse
D Firewall grommets (x3)
E Core support grommets (x2)
F 2 packages of nylon tie wraps
G Parts kit, contains terminals, splices, and extra fuses
H PP-662, high output alternator wire. Note: Use if installing an alternator larger
than 65 amps.
I Painless Performance Manual, this booklet

Figure 3-1 The Painless Performance Wire Harness Kit (Part #10112)

2
4.0 TOOLS NEEDED

In addition to your regular tools, you will need, at least, the following tools:

Crimper tool Note: Use a quality tool to avoid over crimping

Wire stripper
Test light or volt meter
Electric drill
Small ( 10 amp or less) battery charger

5.0 PRE-INSTALLATION AND GENERAL HARNESS ROUTING GUIDELINES

The installation mainly constists in two parts:

• The physical routing and securing of the wire harness, wires, and groups.
• The proper connection of the indivaul circuits.

These two major tasks are not separate steps, but are intergated together. That is, you will route wire
and make some connections, route some more wires and make some more connections.

We can not tell you how to route your harness, but we can offer some guidelines. General guidelines and
routing practices starting in Section 5.2, GENERAL installation instructions in Section 6.0, and precise
instructions concerning the electrical connections you have to make, beginning in Section 7.0.
Remember this harness was designed to be routed in the original manner.

To help you begin thinking through the installation of your new harness, read the following sections.

5.1 Familiarlize yourself with your harness section by locating each of the sections in the
following list. (Whenever a particular section is referred to in these instructions it is
shown in “ all caps”: ENGINE SECTION A)

DIMMER SWICH SECTION WIPER SWITCH

HEATER DOME LIGHT
ALTENATOR WIPER MOTOR
TURN SIGNAL RADIO

Note: For a complete list and information concerning the wires that make up
the harness SECTIONS and indivaul circuits, see SECTION 8.0.

5.2 Decide where and how you want to route your harness, remembering that this harness
has been designed for original routing, Making notes on how the original harness was
routed:

Routing Location and Placement

Emergency Flashers ____________________________________________________

Horn ____________________________________________________

Dome Light ____________________________________________________

Headlight Switch ____________________________________________________

Wipers ____________________________________________________

3
 Air Conditioner ____________________________________________________

Electric Cooling Fan ____________________________________________________

Alternator ____________________________________________________

Voltage Regulator ____________________________________________________

Coil ____________________________________________________

Turn Signals ____________________________________________________

Radio Ign. Switched B+ ____________________________________________________

Gauges ____________________________________________________

Accessories ____________________________________________________

5.3 Note where the following harness group were removed from, so that you can install your
new harness in the same locations.

Headlights ____________________________________________________

Engine ____________________________________________________

Dash ____________________________________________________

Tail Lights ____________________________________________________

Cab Wiring ____________________________________________________

Hood Wiring ____________________________________________________

5.4 A good exercise is to lay out the wire harness on the floor next to your truck and
indentify all the SECTIONS. You will want to route the harness through and around open
areas. Inside edges provide extra protection from hazards and also provides places for tie
wraps, clips, and other supports.
5.5 Route the harness away from sharp edges, exhaust pipes, and hood, trunk, and door
hinges.
5.6 Plan where harness will be located. Always allow enough slack at places where
movement could occur (body to frame, frame to engine, ect.). Use a support every 12
inches unless the harness routes under the floor carpet.
5.7 At the wire ends don’t depend on the terminals to support the harness. The weight could
cause terminals to disconnect or copper wire strand to break.
5.8 The wire should be bundled in groups. Use tie wraps, convoluted split loom, or electrical
tape for harness coverings.

6.0 GENERAL HARNESS INSTALLATION INSTRUCTIONS

6.1 ROUGH INSTALLATION

CAUTION: DISCONNECT THE POWER FROM YOUR VEHICLE BY REMOVING THE

NEGATIVE BATTERY CABLE FROM THE BATTERY.

4
 Note: Make no wire connections or permanent mounting of any kind at this
time!!!

6.1.1 Position the fuse block in its original mounting area. Making sure that you are
clear of the vent handle. See Figure 6.1. See Illustration 1, template for
proper drilling of mounting holes.
6.1.2 Install the large firewall grommet route engine and headlight group and the hood
sections in the areas you noted in Sections 5.3 and 5.4.
6.1.3 Install the grommet with the smallest center hole in the firewall. As shown in
Figure 3.1. Route the TAIL SECTION through here and down the firewall to the
frame. Note: The firewall and frame have mounting brackets.
6.1.4 Install the next large grommet and route the ENGINE SECTION A wire through it.

Note: The original harness has clips for mounting. This will help in securing
your harness.

6.1.5 Route the dash group (ignition, headlight, instrument panel, etc.) upward to the
rear of dash and temperory tie into place.
6.1.6 Route the cab wire section along your floor pan, under the door jamb toward the
rear of the cab. Duct tape is good to hold them in position.

6.2 HARNESS ATTACHMENT

Note: Harness routing and shaping is a time consuming task. Taking your
time will enhance the beauty of your installation. Please be patient and
TAKE YOUR TIME.

6.2.1 Permently mount your fuseblock. ( The fuseblock itself does not have to be
grounded)
6.2.2 Mold harness groups to contour of the floor pan, firewall, fender panels, and any
other area where wire or harness groups are routed. Remember to always route
harness away from sharp edges, exhaust pipes, hood and door hinges.

Note: Do not tighten tie wraps and mounting devices at this time. Make all
harness attachments LOOSELY.

6.2.3 Attach harness groups to your truck with clips or ties starting at the fuse block
and working your way to the rubber grommets for the front and rear groups.
Those wires that stay in the cab route those along the floor pan.The dash wires
should be routed out of the way of any under dash obstacles, such air
conditioning, radio, etc.
6.2.4 When used every 1-1/2” or so on the visible areas of the harness, the plastic
wire ties make a very attractive assembly. A tie wrap in other areas every 6” or
so will hold the wires nicely. Convoluted loom also makes for an attrachtive
assembly.

5
Figure 6.1 Fuse Block - mounted

Figure 6.2 Routing of the Headlight, Hood and Engine Sections

6
Figure 6.3 Routing of the Tail Section. Arrows showing harness and original mounting
bracket on driver’s side.

Figure 6.4 Routing of the Engine Section A wires. Arrows showing cylinder head and
harness on passenger’s side.

7
Figure 6.5 The cross-member at the rear of the truck has a hole and grommet to route your
tail light wires through.

Figure 6.6 Mounting brackets are along the frame for your Tail Section mounting.

8
Figure 6.7 Routing of the Cab Section. Down from the fuse block and through the groove in
the door jamb. Arrows are pointing at the Dimmer Switch and a mounting bracket.

Figure 6.8 Cab mounted fuel tank, has mounting clips on the seam of the tank.

9
Figure 6.9 Grounding strap, engine to chassis.

6.3 GROUNDING THE AUTOMOBILE

A perfectly and beautifully wired automobile will neverless have bugs and problems if
everything is not properly grounded. Do not go to the careful effort of installing a quality
harness only to neglect proper grounding.

6.3.1 Connect a Ground strap or Cable (even a 10-gauge is too small) from the
Negitive Battery terminal to the truck chassis (frame).
6.3.2 Connect a Ground Strap from the Engine to the Chassis. DO NOT RELY UPON
THE MOTOR MOUNTS TO MAKE THIS CONNECTION.
6.3.3 Connect a Ground Strap from the Engine to the Body.
6.3.4 If you have a fiberglass body you should install a terminal block to ground all
your gauges and accessories. Ground the Terminal Block and everything will be
grounded.

Note: Grounding straps may be purchased from most auto supply stores.

6.4 TERMINAL INSTALLATION AND MAKING CONNECTIONS

Note: In the following steps you will be making circuit connections. Before
you start, you should carefully read Sections 1 through 8, as
appropriate, and continually refer to Section 5, DOUBLE-CHECKING
your routing and length calculations before cutting any wires and
making connections. Giving special attention to all switches.

10
 6.4.1 Have all needed tools and connectors handy.
6.4.2 Select the correct size for the wire and stud application.
6.4.3 Determine the correct wire length and cut the wire. Remember to always allow
enough slack in the harness and wires at places where movement could possibly
occur, such as automobile body to frame, frame to engine, etc. Double-check
your calculations.
6.4.4 Strip insulation away from wire. Strip only enough nessessory for the type of
terminal lug you are using. As shown in Figure 6.10.
6.4.5 Crimp the terminal onto the wire.

Note: Make sure the terminal is crimped with the proper crimping tool. An
improper crimp will NOT make a good conection.

CAUTION: DO NOT OVER CRIMP

6.4.6 Connecting the harness throughout the groups is a redundant process. Make
sure that each wire is first properly routed and then attach. DO NOT ATTACH
FIRST THEN ROUTE AFTERWARD.
6.4.7 When all wires are attached, tighten the mounts and ties to secure the harness
permanently.

Figure 6.10 Strip and crimp your wires. CAUTION: DO NOT OVER CRIMP.

11
 6.5 TESTING THE SYSTEM

6.5.1 Use a small battery charger (10 amp or less) to power up the vehicle for circuit
testing. If there is a problem anywhere, the batter charger’s low amperage and
internal circuit breaker will provide circuit protection.

CAUTION: IF YOU HAVE NOT YET DISCONNECTED THE BATTERY FROM THE
AUTOMOBILE, DO SO NOW! DO NOT CONNECT THE BATTERY
CHARGER WITH THE BATTERY CONNECTED.

6.5.2 Connect the battery charger’s NEGATIVE output to the automobile chassis or
engine block and its POSITIVE output to the automobile’s positive battery
terminal.
6.5.3 INDIVIDUALLY turn on each light, ignition, wiper circuit, etc. and check for
proper operation.
6.5.4 When all circuits are checked out THEN attach the battery cable to the battery
for vehicle operation.

7.0 SPECIFIC CIRCUIT CONNECTIONS

Note: Your Alternator may not appear exactly as represented in the Figures. The
circuits are wired the same way, though.

7.1 EARLY GM ALTERNATOR (BEFORE 1969) – EXTERNAL REGULATOR.

(SEE FIGURE 7-1)

7.1.1 Connect ENGINE SECTION wire #915 (RED) to Alternator Output Lug (BATT).
7.1.2 In your kit there is a pigtail labeled ALT/VOLTAGE REG. Take this and plug it
into the alternator. The other end will plug into the regulator. Take the Blu wire
#966, plug it into the F-terminal. The Wht #967 wire will plug into the 2-
terminal.
7.1.3 Take ENGINE SECTION wire #968 Red and attach it to the 3-terminal on the
voltage regulator.
7.1.4 Take the ENGINE SECTION wire #914 Brn and attach it to the 4-terminal on the
voltage regulator.
7.1.5 Take the Blk wire #971 (labeled ALT GROUND) and run it from the Alternator
Ground Lug (G) to chassis ground.

7.2 LATE GM ALTERNATOR (AFTER 1972) – INTERNAL REGULATOR.

(SEE FIGURE 7.2)

7.2.1 Connect ENGINE SECTION wire #914 Brown to Alternator terminal #1.
7.2.2 Connect ENGINE SECTION Wire #968 Red to Alternator terminal #2.
7.2.3 Connect wire #915 to the Alternator Output Lug (BAT).
7.2.4 A connector and terminals for the late GM Alternators are included in the Painless
parts kit.

7.3 GM ONE-WIRE ALTERNATOR (SEE FIGURE 7.3)

7.3.1 Connect ENGINE SECTION wire #915 Red to the Alternator Output Lug (BAT).
7.3.2 Insulate and stow ENGINE SECTION wires #914 Brn and #968 Red. Alternator
terminals 1 & 2 are not used.
7.3.3 When using a 1-wire alternator you must use a voltmeter or ammeter. A
WARNING LIGHT CANNOT BE USED.

Note: If you are going to install an Ammeter, see Section 7.5

12
 Figure 7.1 Early GM Alternator – External Regulator

Figure 7.2 Late GM Alternator – Internal Regulator

13
7.4 HIGH OUTPUT ALTERNATORS (SEE FIGURE 7.4)

7.4.1 If using an alternator larger than 65 amps, you will need to use the high output
wire #960 Red (Coiled 10ga wire found in separate bag kit). It will route from
the alternator (B+) post to the Maxi-Fuse.

Note: This will be used along with the alternator wires in the main harness.

7.5 CONNECTING AN AMMETER AND MAXI FUSE (SEE FIGURE 7.5 AND 7.6)

7.5.1 Most, but not all ammeters must be inserted IN SERIES onto the ENGINE
SECTION wire #916 (10 GA. Red) that routes from the fuse block to the Starter
Solenoid.
7.5.2 The overall physical length of this circuit should be as short as possible (allow
some slack, however). You may have to cut wire #916 and you may have to add
some additional length to it. USE ONLY 10GA. WIRE.
7.5.3 Route wire #916 (from the fuse panel) and connect to the Ammeter NEGATIVE
Terminal.
7.5.4 Route the remainder of the wire #916 from the Ammeter POSITIVE terminal to
the Maxi-Fuse then the Starter Solenoid Battery (B+) terminal.

CAUTION: BOTH AMMETER TERMINALS MUST BE ISOLATED FROM

GROUND. IF EITHER AMMETER TERMINAL COME IN CONTACT
WITH GROUND A HARNESS FIRE IS INEVITABLE. USE EXTREME
CARE AND DILIGENCE IN CONNECTING AN AMMETER.

Figure 7.3 GM One-wire Alternator

14
Figure 7.4 High Output Alternators (over 65 amps)

Figure 7.5 Ammeter and Maxi-Fuse

15
 Figure 7.6 Maxi-Fuse

7.6 IGNITION (START/RUN) SYSTEM

7.6.1 With a crimping tool, attach Maxi Fuse (Figure 7.6) onto ENGINE SECTION
(single) 10GA. Wire #916 Red AFTER having routed this wire from the Fuse
Panel to the Starter Solenoid. This serves as a fuse to protect the entire harness.
DO NOT OMIT IT! (Alternators over 65 amps see Section 7.4).
7.6.2 Connect wire #916-Maxi Fuse installed to the Starter Solenoid Battery terminal.
This is the same lug that the large cable from the battery is connect to.
7.6.3 Connect ENGINE SECTION A wire #919 Pur to Starter Solenoid Start (S)
terminal.
7.6.4 Connect ENGINE SECTION A wire #920 Pnk to the Ignition Coil B+ Terminal.

7.7 STEERING COLUMN, TURN SIGNAL AND IGNITION SWITCH CONNECTORS

Note: This kit is set-up for orginal switches. The orginal vehicle did not have
hazard lights.

7.7.1 In Figure 7.7 the orginal connector is shown. YOU MUST KEEP YOURS, if you
plan on using the original type switch. We have included the the late model
connectors for updated columns.
7.7.2 The TURN SIGNAL SECTION wires have bee pre-terminated for you. If you use
the late model connector you will have to cut off the terminal, and re-terminate
with the proper ones.
7.7.2 See Table 7.1 and Figure 7.7 for original style hook-up.
7.7.3 See Table 7.2 and Figure 7.8 for late model styles.
7.7.4 IGNITION SWITCH SECTION, these wires will have to be pre-terminated with
original push-on terminals. Refer to Table 7.1 for installation.
7.7.5 For later model wiring you will need to cut off the existing terminals and
terminate with the proper terminals. Refer to Table 7.2 and Figure 7.8 for
installation.

16
 Figure 7.7 Original Connector. Viewed from wire insertion side. (See arrow)

TURN SIGNAL SECTION

Wire Color Designation Painless Wire # Position
Blk Horn 953 1
LtBlu Left Front (LF) Turn Signal 926 3
DkBlu Right Front (RF) Turn Signal 925 2
Ylw Turn Flasher 952 5
Pnk Left Rear (LR) Turn Signal 949 7
Pur Right Rear (RR) Turn Signal 948 4
Wht Stop Lamp Switch 918 6
Brn Hazard Flasher 951 See Note

Note: Hazard Lights are not stock, this wire has been installed so that you may
install them. (See Figure 7.5)

IGNITION SWITCH SECTION

Pur Start 919
Org Ignition Switched Accessories/ Coil 933
Red Battery (B+) 934
Brn Accessory (Radio) 932
Wht Ignition Switch Ground 969

Note: Most ignition switches do not have a ground terminal but if yours does, then
you will be required to install the Wht #969 wire.

Table 7.1 Original Turn Signal and Ignition Wiring

17
 TURN SIGNAL SECTION
GM Painless Designation Connector Wire #
Wire Color Wire Color

Blk Blk Horn G 953

LtBlu LtBlu LF Turn Signal H 926
DkBlu DkBlu RF Turn Signal J 925
Brn Brn Hazard Flasher K 951
Pur Ylw Turn Flasher L 952
Ylw Pnk LR Turn Signal M 949
Grn Pur RR Turn Signal N 948
Wht Wht Stop Lamp Switch P 918

IGNITION SWITCH SECTION

Pur/Wht Pur Ignition Start 919

Pnk Org Ignition Switched Accessories/Coil 933
Brn Brn Accessory (Radio) 932
Red Red Battery B+ 934

Table 7.2 Late Model Ignition and Turn Signal Wiring

Figure 7.8 Late Model Turn Signal and Ignition Connectors

(The Black Ignition Connector is not used.)

7.8 HEADLIGHT SECTION

7.8.1 Connect Grn wire #924 to the horn and install grommet for headlight wiring.

18
 Note: The grommet may have to be trimmed a little.

7.8.2 Route the Headlight wires through it.

7.8.3 If you have a 2-headlight system you must terminate a blue male bullet terminal
to the LtGrn and Tan wires, and plug them into the harness.
7.8.4 If you have a 4-headlight system you will use all 4 pigtails. Terminate the Lt.Grn
wire into a yellow male bullet terminal.

Note: You will use one headlight plug with three wires and 1 headlight plug
with two wires. Doubling the two LtGrn wires into one yellow terminal.

7.8.5 Ground the Headlights on the grill. Once again, if you have a 4-headlight system
uses the larger non-insulated ring terminal.

Note: In the 4-headlight system there are only two tan wires.

Figure 7.9 Headlight Section Wiring

(Arrow pointing to the horn connection and the routing of the headlight wires.)

7.9 HOOD SECTION

7.9.1 After routing through the firewall, route it through the hood and down the hood
support. As shown in Figure 7.10 and Figure 7.11.
7.9.2 Splice your wire pigtail to the harness and install. See Figure 7.12.

19
Figure 7.10 Hood Section Wiring
(Routed through the bottom of the hood and grommet installed.

Figure 7.11 Turn Signal and Park Light (shown coming out of the hood support.)

20
 Figure 7.12 Turn Signal has been spliced to the harness and ready to install.

7.10 TAIL SECTION

7.10.1 Measure and cut your Tail Light wires to length desired, then strip and splice
these wires to your tail lights. See Table 7.3.
7.10.2 Cut the license plate light wire and splice to the light. Once spliced install the
light in the bumper. See Figure 7.15.

TAIL LIGHT WIRING

GM Painless Designation Wire #

Color Color

Grn Pur RH Turn 948

Ylw Pnk LH Turn 949
Brn Brn License 950

Table 7.3 Tail Light Hook-Up

21
 Figure 7.13 Tail Lights and License Light (after being removed)

Figure 7.14 Tail Lights removed, wire ready to measure, cut, splice and re-install

22
Figure 7.15 License Light has been spliced and installed back in the bumper

7.11 ENGINE SECTION A - TEMPERATURE SENDING UNIT

7.11.1 These trucks were equipped with gauges, hot and cold lights or just a single
light. This kit is set-up for the hot and cold lights, but can be easily modified for
gauges. Start routing the Grn wire #921 and LtGrn wire #962 to the
temperature-sending unit. Measure and cut to length.
7.11.2 Take the LtGrn wire #962 and strip the wire back about a ¼ in. Crimp the silver
non-insulated terminal to the wire. Then install the connector. This will plug on
the terminal (G) on the sending unit. See Figure 7.16.
7.11.3 Take the Grn wire #921, strip the wire ¼ in. and terminate with a .250 push-on
terminal. Then install on the (R) terminal on the sending unit.
7.11.4 If your sending unit only has one terminal, then you will only use the Grn wire
#921. Once again you will need to strip the wire back a ¼ in., but this time you
will need to terminate the wire with one of the ring terminals supplied in the
parts kit. Once terminated install this wire to the sending unit.
7.11.5 Take the Lt.Grn wire #962 and trim it back, stow the rest in the harness. You will
not need this wire.

7.12 ENGINE SECTION A – ELECTRIC COOLING FANS

Note: The Gry/Wht Wire#901 IS NOT A POWER FEED WIRE TO THE FAN OR
FANS.

7.12.1 If you are running electric cooling fans then you will run Gry/Wt wire #901 to the
fan relay not directly to the fan. This wire is an activation wire for the relay only.
Painless Performance has a relay kit Part #30101 that can be used for your fan
relay. See Figure 7.17.

23
 Figure 7.16 Hot and Cold Sending Unit
(On the left is the terminal and connector for LtGrn wire #962, on the right
side is the .250 terminal for the Grn wire #921.)

Figure 7.17 Typical Fan Relay Installation (Painless Part #30101 Fan Relay Kit)

7.13 ENGINE SECTION A – OIL SENDING UNIT

7.13.1 Find the Blu wire# 922 and route it to the Oil Pressure Sending Unit. Once you
have this, cut and strip your wire.
7.13.2 After strippng your wire back ¼ inch, you now can terminate your wire with the
proper terminal and install.
24
7.14 INSTRUMENT AND CAB WIRING

Note: There are several different variations of instrument panels. This

section may not cover all types of instrument panels.

7.14.1 Hot And Cold Light- Take the light sockets labeled (HOT) and (COLD) and
install the bulbs (provided with this kit) into them. Insert these into their proper
slots in the instrument panel. Some instrument panels only have a HOT light
and no COLD light.
7.14.2 Hot Light only - Take the light socket labeled (HOT), install the bulb and insert it
into the proper slot in the instrument panel.

7.14.3 Temperture Gauge - Take the light socket labeled (HOT) and cut off the socket.
Strip the wire and terminate it with the proper terminals. These terminals have
been supplied in the parts kit. Install the PINK power wire for this gauge. Then
install the GREEN sending unit wire. Remember to GROUND your gauge.

7.14.4 High Beam Indicator – Take the light socket labeled (HIGH BEAM IND.) and
install the bulb and insert it into the proper slot in the instrument panel.

7.14.5 Oil Pressure Light - Take the light socket labeled (OIL), install the bulb and
insert it into the proper slot in the instrument panel.
Oil Pressure Gauge – Take the light socket labeled (OIL) and cut off the socket.
Strip the wires and terminate them with the proper terminals. These terminals
have been supplied in the parts kit. Install the PINK power wire for this gauge.
Then install the BLUE Sending Unit wire. Once again remember to GROUND
your gauge.

7.14.6 Generator Light - Take the light socket labeled (GEN LIGHT) and install the
bulb. Then insert it into the proper slot in the dash. If you are using an
Ammeter or Voltmeter you will cut the light socket off and crimp the two wires
together. NOTE: If using a Voltmeter, crimp these two wires together into a
terminal that will connect to the positive side of your voltmeter. Ground the
other post of the voltmeter. (Ammeter: see Section 7.5)

7.14.7 Fuel Gauge – The (FUEL GAUGE) wires are preterminated. Install the wires,
remember the PINK wire is the power wire and the TAN wire is from the Sending
Unit. Remember to GROUND your gauge.

7.14.8 Turn Signal Indicator - The light socket labeled (TURN) will be used here. Install
the bulb and insert it into the proper slot in the instrument panel. Note: This is
for a single Indicator Light.
7.14.9 Dual Turn Signal Indicator Lights – The light socket labeled (TURN) will be used
here. First, cut the Light Blue wire off this socket. (Leave enough wire
length on the socket to crimp another wire to it). Take the extra turn
signal light pigtail included in the kit and splice this Light Blue wire to the
harness side of the Light Blue wire you just cut. Splice the loose Black wire on
the extra turn signal light pigtail to the socket side of the Light Blue wire you cut.
Install the extra turn signal light socket into the Left Turn Indicator slot. The light
socket labeled (TURN) will be installed in the Right Turn Indicator slot. Refer
to Figure 7.18C.
7.14.10 Headlight Switch Connections- The harness is preterminated and the correct
plug is preinstalled for a ’64-’66 Chevrolet Pickup Headlight Switch. See Figure
7.18A for connector pinout. If you are using a 1963 headlight switch you will
need to cut off the headlight switch connector and crimp a female spade
connector onto each wire. These spade connectors are included in the parts kit.
Refer to Figure 7.18B for the correct pinout of this headlight switch
25
 Figure 7.18A ’64-’66 Headlight Switch Figure 7.18B ’63 Headlight Switch

Figure 7.18C Turn Signal Diagram

7.15 WINDSHIELD WIPERS

7.15.1 Find the pigtail labeled Wipers, taking the end with the clear connector and
installing it onto the wiper switch in the dash.

7.15.2 Routing it to the wiper motor. See Figure 7.19 for installation.

26
 A B
1 2 3
4

Figure 7.19 Wiper Motor

WIPER DIAGRAM

Wire Color Connector Designation

Blk/Ylw¹ Blue push-on Terminal A

Blu Blue push-on Terminal B
Blk/Ylw¹ Red 1-pin Terminal 1
Pnk² Black 2-pin Terminal 2
Wht Black 2-pin Terminal 3
Blk Red 1-pin Terminal 4

Notes:
1 Blk/Ylw is a Jumper Wire.
2 Black 2-pin connector with the pink and white connectors
are from the main harness.

Table 7.4 Wiper Diagram

(Letters and numbers are for reference only, not printed on motor.)

27
8.0 WIRE CONNECTION INDEX AND FUSE REQUIREMENTS

In each section, connect the wire, as indentified by its wire color, to the appropriate item in the
CONNECT TO column. Pay close attention to the NOTES in this section. Indentified by small,
raised number such as the one at the end of this sentence.¹

Table 8.2 is divided into sections that correspond to the sections of your wire harness, (HOOD
SECTION, CAB SECTION, TAIL SECTION, etc). The Index is divided vertically into six columns:
COLOR, GA. NUMBER, CONNECT TO, ORGIN, and SECTION OF ORGIN.

The columns labelled ORGIN and SECTION OF ORGIN are for your reference ONLY. The items in
these columns tell you where each originates (ORGIN) and from which section (SECTION OF
ORGIN) of the harness.

The column NO contains a 900-series number that is used to indentify various wires in the wiring
diagrams that are a part of these instructions.

Many (but not all) of the numbers occur TWICE in this index. That is because you will be
connecting BOTH ENDS of many of the particular wire segments. However, some wire segments
are pre-connected at one end. For instance all wires orginating from the fuse panel and certain
other wires such as those orginating from the horn relay, the dimmer switch, and the instrument
panel section. These pre-connected wires are indentifed by an asterick (*) in the ORGIN column.

8.1 FUSE REQUIREMENTS

Headlight Switch 30
Emergency Flashers 15
Turn Signals 15
Gauges 10
AC/Heat Relay 5
Radio (Constant) 10
Horn 20
Wipers 15
Brake Switch 20
Dome/Trunk 10
Electric Fan Relay 5
Coil 30
Radio Ignition (Switched) 10

Table 8.1 Fuse Requirements

28
8.2 WIRE CONNECTION INDEX

Color Ga. No. Connect to Wire Starting Point Section of

Starting Point
ACCESSORY SECTION
SWITCHES
Gry/Wht 18 901 Cooling Fan Switch Fan Relay Engine Section A
Wht 18 971 Wiper Switch Wiper Motor Radio Section

ACCESSORY SECTION
B+
Brn 14 904 AC/Heat Switch B+ Fuse Panel Fuse Panel
Pnk 18 905 Wiper Motor B+ Fuse Panel Fuse Panel
Gry/Wht 18 906 Cooling Fan Switch B+ Fuse Panel Fuse Panel

DIMMER SWITCH
SECTION
LtBlu 14 907 Dimmer Switch Headlight Switch Headlight Section B
LtGrn 14 908 Dimmer Switch High Beam Headlight Section A
Tan 14 909 Dimmer Switch Low Beam Headlight Section A

ENGINE SECTION
Brn 18 914 Alternator Exciter Charging Light Dash Section
Red 10 915 Alternator B+ Fuse Panel Fuse Panel
Red 14 968 Voltage Regulator Fuse Panel Fuse Panel
Red 10 960 Alternator B+ Starter Solenoid Engine Section A
(“B” Terminal)

ENGINE SECTION
(SINGLE WIRE)
Red 10 916 Battery Positive or Fuse Panel Fuse Panel
Starter Solenoid
(Large Terminal)

ENGINE SECTION A
Orn 14 917 Brake Switch B+ Fuse Panel Fuse Panel
Wht 16 918 Brake Switch Turn Signal Switch Turn Signal Switch
Pur 12 919 Starter Solenoid Ignition Switch Ignition Switch
("S" Terminal) Start Section
Pnk 14 920 Coil B+ Fuse Panel Fuse Panel
Grn 18 921 Temperature Sending Temperature Gauge Instrument Panel
Unit (Hot) (Hot) Section
Blu 18 922 Oil Pressure Sending Oil Pressure Light Instrument Panel
Unit Section
LtGrn 18 962 Temperature Sending Temperature Gauge Instrument Panel
Unit (Cold) (Cold) Section
Red 18 954 Electric Choke Fuse Panel Fuse Panel
Gry/Wht 18 901 Fan Relay Fan Switch Accessory Section
Switches
Red 10 960 MAXI-FUSE Alternator B+ Engine Section

Table 8.2 Wire Connection Index (1 of 3)

29
Color Ga. No. Connect to Wire Starting Point Section of Starting
Point
HEADLIGHT SECTION A
Grn 14 924 Horn B+ Horn Relay Fuse Panel
LtGrn 14 908 High Beam Dimmer Switch Dimmer Switch Section
Tan 14 909 Low Beam Dimmer Switch Dimmer Switch Section

HOOD SECTION
Blu 18 925 RF Turn Signal Turn Signal Switch Turn Signal Section
LtBlu 18 926 LF Turn Signal Turn Signal Switch Turn Signal Section
Wht 18 927 Front Park Lights Headlight Switch Headlight Section B

HEADLIGHT SECTION B
Red 12 928 Headlight Switch B+ Fuse Panel Fuse Panel
LtBlu 14 907 Headlight Switch Dimmer Switch Dimmer Switch Section
Brn 14 929 Headlight Switch Tail Lights Tail Section
Wht 18 927 Headlight Switch Park Lights Headlight Section A
Gry 18 930 Headlight Switch Instrument Panel Instrument Panel
Lighting Section
Orn 14 959 Headlight Switch B+ Fuse Panel Fuse Panel
Wht 18 961 Headlight Switch Dome Switch Cab Section

IGNITION SWITCH SECTION

Org 12 933 Ignition Switched Acc/ Coil Fuse Panel Fuse Panel
Brn 16 932 Accessory (Radio) Fuse Panel Fuse Panel
Wht 12 969 Ignition Switch Ground Temperature Light Dash Section
Red 12 934 Ignition Switch B+ Fuse Panel Fuse Panel
Pur 12 919 Starter Signal Starter Solenoid Engine Section A

INSTRUMENT PANEL
SECTION
Brn 18 914 Charging Light Voltage Regulator Voltage Regulator
Brn 18 970 Charging Light Fuse Panel Fuse Panel
LtGrn 18 936 High Beam Indicator Dimmer Switch Dimmer Switch Section
LtBlu 18 937 Turn Indicator LF Turn Signal Turn Signal Section
Blu 18 938 Turn Indicator RF Turn Signal Turn Signal Section
Gry 18 930 Instrument Panel Lighting Headlight Switch Headlight Section B
Tan 18 939 Fuel Gauge Fuel Sending Unit Tail & Cab Sections
Grn 18 921 Temp. Gauge (Hot) Temp. Sending Unit Engine Section A
Blu 18 922 Oil Light Oil Pres. Sending Unit Engine Section A
LtGrn 18 962 Temp. Gauge (Cold) Temp. Sending Unit Engine Section A
Orn/Blk 18 955 4 Wheel Drive Switch Fuse Panel Fuse Panel

Table 8.2 Wire Connection Index (2 of 3)

30
 Color Ga. No. Connect to Wire Starting Point Section of
Starting Point
RADIO SECTION
Red 18 940 Radio B+ Unswitched Fuse Panel Fuse Panel
(Constant)
Red/Blk 18 941 Radio B+ Switched Fuse Panel Fuse Panel

TAIL SECTION
Pur 16 948 RR Turn Signal Turn Signal Switch Turn Signal Section
Pnk 16 949 LR Turn Signal Turn Signal Switch Turn Signal Section
Tan 16 939 Fuel Sending Unit Fuel Gauge Instrument Panel
(Frame) Section
Brn 16 929 Tail Lights Headlight Switch Headlight Section B

CAB SECTION
Wht 18 961 Dome Light (Ground) Headlight Switch Headlight Switch B
Orn 18 945 Dome Light (Power B+) Fuse Panel Fuse Panel
Tan 18 939 Fuel Sending Unit (Cab) Fuel Gauge Dash Section

TURN SIGNAL
SECTION
Brn 14 951 Emergency Flasher Emergency Flasher Fuse Panel
Switch B+ Relay
Ylw 14 952 Turn Signal Switch Turn Flasher Relay Fuse Panel
Flasher B+
Blk 18 953 Horn Switch Horn Relay Fuse Panel
Pur 14 948 Turn Signal Switch RR Turn Signal Tail Section
Pnk 14 949 Turn Signal Switch LR Turn Signal Tail Section
Blu 18 925 Turn Signal Switch RF Turn Signal Hood Section
Wht 16 918 Turn Signal Switch Brake Switch Engine Section A
LtBlu 18 926 Turn Signal Switch LF Turn Signal Hood Section
Table 8.2 Wire Connection Index (3 of 3)

31
Figure 7.20 Engine Run-on

This condition occurs when installing GM alternators. Use the drawing above for a simple cure.

32
Illustration 1 Template for mounting fuse block

33
 Painless Performance Limited Warranty
and Return Policy

Chassis harnesses and fuel injection harnesses are covered under a lifetime warranty.

All other products manufactured and/or sold by Painless Performance are warranted to
the original purchaser to be free from defects in material and workmanship under
normal use. Painless Performance will repair or replace defective products without
charge during the first 12 months from the purchase date. No products will be
considered for warranty without a copy of the purchase receipt showing the sellers
name, address and date of purchase. You must return the product to the dealer you
purchased it from to initiate warranty procedures.

34