Section C

Electrics
Service Manual - 3DX / 4DX Backhoe Loader
Section 1 - General Information
Section 2 - Operator’s Manual
Section A - Attachments
Section B - Body and Framework
Section C - Electrics
Section D - Controls
Section E - Hydraulics
Section F - Transmission
Section G - Brakes
Section H - Steering
Section K - Engine

Publication No.
9813/2050-3

World Class
Customer Support
Copyright © 2004 JCB SERVICE. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any other means,
electronic, mechanical, photocopying or otherwise, without prior permission from JCB SERVICE.

Issued by JCB Technical Publications, JCB Aftermarket Training, Woodseat, Rocester, Staffordshire, ST14 5BW, England. Tel +44 1889 591300 Fax +44 1889 591400
 Section C - Electrics

Notes:

C-0 9813/2050-3 C-0

 Section C - Electrics
Contents

Contents Page No.

Service Procedure
Using a Multimeter ..................................................................................... 1-1
Measuring DC Voltage ..........................................................................1-2
Measuring Resistance ...........................................................................1-2
Measuring Continuity .............................................................................1-3
Measuring Frequency ............................................................................1-3
Testing a Diode or a Diode Wire ............................................................1-4
Battery ....................................................................................................... 1-5
Maintenance ..........................................................................................1-5
Testing ...................................................................................................1-5
Specific Gravity Testing .........................................................................1-7
Alternator ................................................................................................... 1-8
General Description ...............................................................................1-8
Service Precautions ..............................................................................1-8
Charging Circuit Test .............................................................................1-8
Alternator Charging Test ........................................................................1-9
Starter Motor ............................................................................................ 1-11
Starting Circuit Test ............................................................................. 1-11

Circuit Schematics
Electrical Circuit ....................................................................................... 1-13
Electrical Circuit ....................................................................................... 1-14
Maxi Fuses Harness ................................................................................ 1-15
Electrical Harness .................................................................................... 1-16
Cab Harness - 2WD ................................................................................ 1-17
Panel Harness 4WD ................................................................................ 1-18

Fuses
................................................................................................................ 1-19

C-i C-i
 Section 1 - Electrics

Service Procedure
Using a Multimeter
TC-002

In order to obtain maximum benefit from the fault finding

information contained in Section C it is important that the
technician fully understands the approach to fault finding
and the use of the recommended test equipment, in this
case a FLUKE 85 or AVO 2003 digital multimeter, or a
moving pointer (analogue) multimeter. The approach is
based on a fault finding check list. In tracing the fault from
the symptoms displayed you will be directed to make
measurements using a multimeter.

These instructions are intended to cover the use of the

recommended multimeters.

Fig 2. AVO 2003

Fig 1. FLUKE 85

Fig 3. A Typical Analogue Meter

1-1 9813/2050-3 1-1

 Section 1 - Electrics
Service Procedure
Using a Multimeter
1 Make sure that the test leads are plugged into the Measuring Resistance
correct sockets. The black test lead should be
plugged into the black socket (sometimes, this socket 1 Make sure there is no power to the part of the circuit
is also marked by a "-", or "E" or marked as you are about to measure.
"COMMON" or "COM"). The red test lead should be
plugged into the red socket marked with "+", "V" or 2 Connect one probe at one end of the component or
"Ω". wire to be checked and the other probe at the other
end. It does not matter which way round the two
2 When making measurements ensure that the test probes are placed.
probes have a good clean contact with bare metal,
free from grease, dirt, and corrosion as these can 3 Select the correct range on the multimeter.
cause a false reading.
a On the FLUKE 85.
3 When measuring voltage: Make sure that the correct
range is selected, that is set the selector to a value i Turn the switch to position 1-C and check that
equal to or greater than that you are about to the W sign at the right hand side of the display
measure. e.g. If asked to measure 12 Volts, set the window is on. If the F sign is on instead, press
selector to the 12V range. If there is no 12V range, set the blue button 1-G to change the reading to
the selector to the next range higher, 20V for Ω. Touch the meter lead probes together and
instance. If the meter is set to a range that is too low, press the REL3 key on the meter to eliminate
it may be damaged. e.g. setting to the 2V range to the lead resistance from the meter reading.
measure 12V.
b On the AV0 2003.
Measuring DC Voltage
i Move the right hand slider switch to position 2-
1 Select the correct range on the multimeter. B, and the left hand slider switch to the
appropriate Ohms (Ω) range.
a On the FLUKE 85.
c On an analogue meter.
Turn the switch to position 1-B.
i Move the dial to the appropriate Ohms (Ω)
b On the AV0 2003.
range.
Move the right slider switch to position 2-A, and
the left hand slider switch to the appropriate
range.

c On an analogue meter.

Turn the dial to the appropriate DC Volts range.

2 Connect the black probe to the nearest available

suitable earth point, usually this will be the starter
motor earth, the battery negative, or the chassis.
Connect the red probe to the wire or contact from
which you are measuring the voltage.

1-2 9813/2050-3 1-2

 Section 1 - Electrics
Service Procedure
Using a Multimeter

Measuring Continuity Measuring Frequency

1 Make sure there is no power to the part of the circuit The AVO 2003 and the analogue meter are not capable of
you are checking for continuity. measuring frequency, therefore a Fluke 85 digital
multimeter must be used.
2 Connect one probe to one end of the component or
wire to be checked and the other probe to the other 1 Insert the black plug into the COM socket on the
end. It does not matter which way round the two meter and attach the probe to the nearest suitable
probes are placed. earth point on the chassis, for example, the battery
negative terminal.
3 Select the correct range on the multimeter.
2 Insert the red probe into socket 1-J.
a On the FLUKE 85.
3 Turn the selector switch to position 1-A and depress
Turn the switch to position 1-C and check that the 1-G repeatedly until 1-F is highlighted on the top row
beeper symbol appears at the left hand side of the of the display.
display window. If the F sign is on instead, press
the button labelled 1-F in the meter drawing. 4 Press button 1-H once.

If there is continuity in the circuit, the beeper will 5 Touch or connect the red probe to the frequency
sound. If there is no continuity (open circuit), the source to be measured. Press and hold button if an
beeper will not sound. average reading is required.

b On the AV0 2003.

Move the right hand slider switch to position 2-B,

and the left hand slider switch to position 2-C.

If there is continuity (i.e. very low resistance)

between two points the buzzer will sound.

c On an analogue meter.

Turn the dial to the lowest Ohms (Ω) range.

If there is continuity (i.e. very low resistance)

between two points the needle will move across
fully (or almost fully) to the right hand side of the
scale.

1-3 9813/2050-3 1-3

 Section 1 - Electrics
Service Procedure
Using a Multimeter

Testing a Diode or a Diode Wire c On an analogue meter.

A diode wire is a diode with male connector fitted on one i Select the Ohms 1000s (1k) range.
end and a female connector fitted on the other end. The
diode is sealed in heatshrink sleeving. Connect the black probe to the end of the
diode marked with a band, or to the male
1 To test a Diode or a Diode Wire connector of the diode wire, the red probe
should be connected to the other end of the
a On the FLUKE 85. diode or diode wire. The meter should read
20-400 kΩ, if it reads more than this the diode
i Turn the switch to position 1-D. is faulty.

ii Press the HOLD button and check that the H ii Select the Ohms 100s range.
sign appears at the top right hand side of the
display window. Connect the red probe to the end of the diode
marked with a band, or to the male connector
iii Connect the black probe to the end of the of the diode wire, the black probe should be
diode with a band or to the male connector of connected to the other end of the diode or
the diode wire. Connect the red probe to the diode wire. The meter should read 300-400Ω,
other end of the diode or diode wire. If the if it reads less than this the diode is faulty.
beeper does not sound the diode or diode wire
is faulty.

iv Connect the red probe to the end of the diode

marked with a band, or to the male connector
of the diode wire, the black probe should be
connected to the other end of the diode or
diode wire. If the beeper sounds or the meter
does not read O.L., the diode or diode wire is
faulty.

v Press the HOLD button and check that the H

sign disappears from the right hand side of the
display window.

b On the AV0 2003.

i Move the right hand slider to position 2-A, and

the left hand slider switch to position 2-C.

ii Connect the black probe to the end of the

diode marked with a band, or to the male
connector of the diode wire, the red probe
should be connected to the other end of the
diode or diode wire. If the Avometer does not
buzz the diode is faulty.

iii Connect the red probe to the end of the diode

marked with a band, or to the male connector
of the diode wire, the black probe should be
connected to the other end of the diode or
diode wire. If the Avometer does not read "1"
the diode is faulty.

1-4 9813/2050-3 1-4

 Section 1 - Electrics
Service Procedure
Battery

Battery
TC-001_5

Maintenance !MWARNING
To ensure that the battery provides optimum performance Batteries give off an explosive gas. Do not smoke
the following steps should be observed: when handling or working on the battery. Keep the
battery away from sparks and flames.
1 Make sure that the electrical connections are clean
and tight. Smear petroleum jelly on connectors to Battery electrolyte contains sulphuric acid. It can burn
prevent corrosion. you if it touches your skin or eyes. Wear personal
protective equipment (PPE). Handle the battery
2 When applicable - never allow the electrolyte level to carefully to prevent spillage. Keep metallic items
fall below the recommended level - 6 mm (1/4 in) (watches, rings, zips etc) away from the battery
above the plates. Use only distilled water for topping terminals. Such items could short the terminals and
up. burn you.

3 Keep the battery at least three quarters charged, Set all switches to OFF before disconnecting and
otherwise the plates may become sulphated connecting the battery. When disconnecting the
(hardened) - this condition makes recharging the battery, take off the earth (-) lead first.
battery very difficult.
Re-charge the battery away from the machine, in a well
Extra precautions must be taken when bench charging ventilated area. Switch the charging circuit off before
maintenance free batteries, they are more prone to connecting or disconnecting the battery. When you
damage by overcharging than the standard type of battery: have installed the battery in the machine, wait five
minutes before connecting it up.
– Never boost-charge a maintenance free battery (if
fitted). When reconnecting, fit the positive (+) lead first.
5-3-4-12_2
– Never charge a battery at a voltage in excess of 15.8
Volts.
Testing
– Never continue to charge a battery after it begins to
gas.
This test is to determine the electrical condition of the
battery and to give an indication of the remaining useful
'life'.

Before testing ensure that the battery is at least 75%

charged (SG of 1.23 to 1.25 for ambient temperature up to
27°C).

Ensure that the battery is completely disconnected from

the vehicle.

Connect up the battery tester as follows:

1 Set the CHECK/LOAD switch 4-A to OFF.

2 Set rocker switch 4-B to the battery voltage (12V).

3 Connect the red flying lead to the battery positive (+)

terminal and the black flying lead to the battery
negative (-) terminal.

1-5 9813/2050-3 1-5

 Section 1 - Electrics
Service Procedure
Battery
4 Set the CHECK/LOAD switch 4-A to CHECK to read
the battery no-load voltage which should be at least
12.4 volts.

5 Set the CHECK/LOAD switch 4-A to LOAD and hold

down for 5-10 seconds until the meter reading
stabilises. The reading should be at least 9 volts.

Note: Do not hold the switch in the LOAD position for more
than 10 seconds.

6 K Table 1. Fault Diagnosis ( T 1-6), if the foregoing

tests are unsatisfactory. Fig 4. Battery Tester

Table 1. Fault Diagnosis

Battery Tester Readings Remedy
1 CHECK: 0 - 12.6 Volts Renew battery

LOAD: less than 6 Volts

2 CHECK: 6 - 12.4 Volts Recharge and re-test. If tests still unsatisfactory renew
battery.
LOAD: less than 9 Volts and falls steadily but remains
in yellow zone.
3 CHECK: less than 10 Volts Indicates battery has been over-discharged and unlikely to
recover. Renew battery.
LOAD: less than 3 Volts
4 CHECK: more than 11 Volts Charge battery which will probably recover.

LOAD: 6 - 10 Volts steady

1-6 9813/2050-3 1-6

 Section 1 - Electrics
Service Procedure
Battery

Specific Gravity Testing Readings should be as tabulated and should not vary
between cells by more than 0.04. A greater variation
The specific gravity of the electrolyte gives an idea of the indicates an internal fault on that particular cell.
state of charge of the battery. Readings should be taken
using a hydrometer, when the electrolyte temperature is If the electrolyte temperature is other than 15°C (60°F) a
15°C (60°F). If the battery has recently been on charge, 'correction factor' must be applied to the reading obtained.
wait approximately one hour (or slightly discharge the Add 0.07 per 10°C (18°F) if the temperature is higher than
battery) to dissipate the surface charge before testing. 15°C (60°F) and subtract the same if the temperature is
lower.

Table 2. Specific Gravity at 15°C (60°F)

Fully Charged Half Discharged Fully Discharged
Ambient temperature up to 27°C (80°F) 1.270 - 1.290 1.190 - 1.210 1.110 - 1.130
Ambient temperature above 27°C (80°F) 1.240 - 1.260 1.170 - 1.190 1.090 - 1.110

1-7 9813/2050-3 1-7

 Section 1 - Electrics
Service Procedure
Alternator

Alternator
TC-006_2

General Description Charging Circuit Test

The alternator is a three phase generator having a rotating 1 Ensure that all battery and alternator connections are
field winding and static power windings. in place, secure and making good metal - to - metal
contact, especially the 'earth' connections to chassis
When the start switch is turned on, current from the battery and engine.
flows by way of the 'No Charge' warning light to the field
winding. This creates a magnetic field which supplements 2 Adjust the alternator drive belt tension if necessary
the residual magnetism in the rotor poles. As the engine is and make sure that the battery is well charged.
started, the fan belt drives the rotor and alternating current
is generated in the power windings as they are cut by the 3 Turn the start switch to the ON position.
rotating magnetic field. Output is controlled by a solid state
regulator which varies the field current in accordance with 'Oil pressure' and 'No charge' warning lights should
electrical demand. glow. If any light fails, K Check 1 ( T 1-8).

Servicing is restricted to periodic inspection of slip ring 4 Start the engine; all warning lights should extinguish
brushes. Bearings are 'sealed for life'. rapidly.

Service Precautions If the 'No charge' warning light remains ON, K Check
2 ( T 1-9).
1 Ensure that the battery negative terminal is
connected to the earthing cable. If the oil pressure warning remains on stop engine
Immediately and investigate the engine lubrication
2 Never make or break connections to the battery or system.
alternator, or any part of the charging circuit whilst the
engine is running. Disregarding this instruction will Check 1
result in damage to the regulator or rectifying diodes.
With start switch 'ON' try the heater motor and screen
3 Main output cables are 'live' even when the engine is wiper.
not running. Take care not to earth connectors in the
moulded plug if it is removed from the alternator. If they operate normally, check the warning light bulb/LED
is not defective.
4 During arc welding on the machine, protect the
alternator by removing the moulded plug (or if Simultaneous failure of all items indicates a fault at the
separate output cables fitted, remove the cables). start switch. Check for cable disconnection before
condemning the switch itself.
5 If jump starting starting is necessary, connect the
second battery in parallel without disconnecting the If the 'No charge' warning bulb/LED is in good order,
vehicle battery from the charging circuit. The second withdraw the triple plug from the back of the alternator.
battery may then be safely removed after a start has Make a temporary connection between the SMALL
been obtained. Take care to connect batteries terminal in the plug and earth as shown below. If the 'No
positive to positive, negative to negative. charge' warning bulb/LED still fails to light, check the cable
for continuity. If the bulb/LED now lights, check the
alternator for a defective regulator. K Alternator
Charging Test ( T 1-9).

1-8 9813/2050-3 1-8

 Section 1 - Electrics
Service Procedure
Alternator

Alternator Charging Test

Fig 5.

Check 2

Note: The following checks should be made using an

analogue (moving pointer) type meter.

1 Stop the engine and turn the starter switch to OFF.

2 Withdraw the alternator plug and connect the test Fig 7.

meter between the large terminals and 'earth'. With
the meter set to measure 12V DC, the meter should 1 Ensure that all battery and alternator connections are
show battery voltage. If the reading is zero, check the in place, secure and making good metal - to - metal
cables for continuity, particularly at the starter contact, especially the 'earth' connections to chassis
terminals. and engine.

2 Make sure that the alternator drive belt tension is

correctly adjusted.

3 If the battery is in a fully charged condition, switch on

the working lights for 3 minutes before commencing
the test. Alternatively, operate the starter for a few
moments with the engine stop fuse removed (See
Fuse Identification).

4 Install a 100 amp open - type shunt between the

battery positive lead and the battery positive terminal.
Fig 6.
5 Connect a multimeter positive lead to machine side of
If the voltage is correct, check the alternator. the shunt and negative lead to battery side of the
K Alternator Charging Test ( T 1-9). shunt.

6 Connect the leads to the meter and set the meter to

the relevant range as follows.

1-9 9813/2050-3 1-9

 Section 1 - Electrics
Service Procedure
Alternator
11 Faults d, e, and f may be checked only by removing
AVO 2002 – Red lead to volts (middle) socket on
and dismantling the alternator for further testing.
meter.
– Black lead to negative on meter.
– RH slider to DC voltage.
– LH slider. K Fig 7. ( T 1-9).
AVO 2003 – Red lead to amps socket (marked A) on
the meter.
– Black lead to negative on meter.
– RH slider to DC voltage
– LH slider to 200 Shunt
FLUKE 85 – Red lead to volts socket (marked V ) on
meter.
– Black lead to COM socket on meter.
– Set dial to mV.

7 Start the engine and run at maximum speed (see

Technical Data). Meter should show maximum
alternator output in Amps (see Technical Data).

Note: The meter reading should be taken as soon as

possible after starting the engine, as the charging current
will fall rapidly.

8 A zero reading indicates failure of the alternator and

may be caused by one of the following conditions.
These are listed in the order of probability.

a Defective suppression capacitor.

b Dirty slip rings or worn brushes.

c Defective regulator.

d Defective rectifier.

e Open or short - circuited field (rotor) windings.

f Open or short - circuited power (stator) windings.

9 To check for fault a, disconnect the capacitor and

repeat the charging test. Renew the capacitor if
necessary.

10 To check for faults b and c, remove the regulator and

brush box assembly. Check the condition of the
brushes and, if necessary, clean the slip rings using
extra-fine glass paper. The regulator may only be
checked by substitution.

1-10 9813/2050-3 1-10

 Section 1 - Electrics
Service Procedure
Starter Motor

Starter Motor
TC-005

Starting Circuit Test than 0.5V below the reading obtained in Step 1.
Minimum permissible reading in 'start' position 9.0V.
Before carrying out the voltmeter tests, check the battery
condition and ensure that all connections are clean and If the reading is within this limit, continue to Step 3. If
tight. the reading is outside the limit, proceed to Step 4 and
Step 5.
To prevent the engine starting during the tests ensure that
the engine stop fuse is removed, (refer to Fuse
Identification page).

Check the readings in the following sequence using a

voltmeter. Unless otherwise stated, the readings must be
taken with the starter switch held in the 'start' position ('HS')
and the transmission forward/reverse selector in neutral.

Note: Do not operate the starter motor for more than 20

seconds at one time. Let the starter motor cool for at least
two minutes between starts.

1 Connect the voltmeter across the battery terminals.

K Fig 8. ( T 1-11). Reading in 'start' position: 10.0V
approximately. Minimum permissible reading in 'start' Fig 9.
position 9.5V.
3 Connect the voltmeter between the solenoid terminal
A low reading probably indicates a fault in the starter 10-C and a good earth. Minimum permissible reading
motor. in 'start' position: 8.0V.

Fig 8. Fig 10.

2 Connect the voltmeter between the starter main a If the reading is less than specified, connect the
terminal 9-A and the commutator end bracket 9-B. In voltmeter between the neutral start relay terminal
the 'start' position, the reading should not be more 11-D and earth. An increase in reading to 8.0V
indicates a fault in the wiring from the start relay to
the solenoid.

1-11 9813/2050-3 1-11

 Section 1 - Electrics
Service Procedure
Starter Motor
b If the reading between terminal 11-D and earth is 5 Connect the voltmeter between battery positive and
below 8.0V, connect the voltmeter between the starter main terminal 13-A. With the starter switch
terminal 11-E and earth. An increase in the 'off', the voltmeter should indicate battery voltage, but
reading to 8.0V indicates either a faulty start relay it should fall to practically zero when the switch is
or a fault in the feed from the transmission turned to the 'on' position, maximum permissible
selector switch to the relay solenoid. Check also reading 0.25V.
the solenoid earth connection.

If the reading between 11-E and earth is less than

8.0V, the fault must be in either the starter switch
or in the wiring between the solenoid, starter
switch, and the start relay.

Fig 13.

If the reading is above 0.25V, a high resistance is

present in the insulated lead or in the solenoid.
Connect the voltmeter between the battery positive
and solenoid connection 14-H. If the voltmeter now
reads zero with the switch closed, the fault is in the
Fig 11. solenoid.
4 Connect the voltmeter between battery negative and
starter earth connection 12-B. The reading in the
'start' position should be practically zero, maximum
permissible reading 0.25V.

If the reading is above 0.25V, a high resistance in the

earth lead or connections is indicated.

Fig 14.

6 Finally refit the engine stop fuse.

Fig 12.

1-12 9813/2050-3 1-12

 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX

Circuit Schematics
Electrical Circuit - 3DX

From Serial Number

– 1828001 to 1899999

Fig 15.

1-13 9813/2050-3 1-13

 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX

Fig 16.

1-14 9813/2050-3 1-14

 Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
1-15

From Serial Number

– 1486501 to 1502999 and 1414001 to 1416999
9813/2050-3

Electrical Circuit - 3DX Xtra, 3DX Super and 4DX

Section 1 - Electrics
Circuit Schematics
1-15

D070880-01
Fig 17. 334/Y7150 sheet 1
 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
D070880-02
Fig 18. 334/Y7150 sheet 2
1-16 9813/2050-3 1-16
 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
D070880-03
Fig 19. 334/Y7150 sheet 3
1-17 9813/2050-3 1-17
 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
D070880-04
Fig 20. 334/Y7150 sheet 4
1-18 9813/2050-3 1-18
 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
D070880-05
Fig 21. 334/Y7150 sheet 5
1-19 9813/2050-3 1-19
 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
D070880-06
Fig 22. 334/Y7150 sheet 6
1-20 9813/2050-3 1-20
 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
D070880-07
Fig 23. 334/Y7150 sheet 7
1-21 9813/2050-3 1-21
 Section 1 - Electrics
Circuit Schematics
Electrical Circuit - 3DX Xtra, 3DX Super and 4DX
D070880-08
Fig 24. 334/Y7150 sheet 8
1-22 9813/2050-3 1-22
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX

Harness Data - 3DX

From Serial Number

– 1828001 to 1899999

Maxi Fuses Harness

Fig 25.

1-23 9813/2050-3 1-23

 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX
Chassis Harness

Fig 26. To 1828000

1-24 9813/2050-3 1-24

 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX
Fig 27. (1828001 to 1833426)
1-25 9813/2050-3 1-25
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX
Cab Harness - 2WD

Fig 28.

1-26 9813/2050-3 1-26

 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX
Panel Harness 4WD

Fig 29.

1-27 9813/2050-3 1-27

 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX
Fig 30. (1828001 to 1833426)
1-28 9813/2050-3 1-28
 Harness Data - 3DX Xtra, 3DX Super and 4DX
1-29

From Serial Number

– 1486501 to 1502999 and 1414001 to 1416999

Chassis Harness
9813/2050-3

Harness Data - 3DX Xtra, 3DX Super and 4DX

Section 1 - Electrics
Circuit Schematics
D070870-01
Fig 31. 334/Y4606
1-29
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX Xtra, 3DX Super and 4DX
D070870-02
Fig 32. 334/Y4607
Panel Harness
1-30 9813/2050-3 1-30
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX Xtra, 3DX Super and 4DX
D070870-06

D070870-07
Fig 33. 334/Y7355 (3DX Xtra Base)

Fig 34. 334/Y7356 (3DX Super)

1-31 9813/2050-3 1-31
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX Xtra, 3DX Super and 4DX
D070870-08
Fig 35. 334/Y7358 (3DX Super Servo and AC)
1-32 9813/2050-3 1-32
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX Xtra, 3DX Super and 4DX
D070870-03
Fig 36. 333/Y8485
Roof Harness
1-33 9813/2050-3 1-33
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX Xtra, 3DX Super and 4DX
D070870-04
Fig 37. 40/302817
Maxi Fuse Harness
1-34 9813/2050-3 1-34
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX Xtra, 3DX Super and 4DX
D070870-05
Fig 38. 334/Y7733
Rear Horn Pigtail
1-35 9813/2050-3 1-35
 Section 1 - Electrics
Circuit Schematics
Harness Data - 3DX Xtra, 3DX Super and 4DX

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1-36 9813/2050-3 1-36

 Section 1 - Electrics
Fuses
Fuses

Fig 21.
1-19 9813/2050-3 1-19
 Section 1 - Electrics
Fuses

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1-20 9813/2050-3 1-20