1967-1968 Ford Mustang Tach

Part Numbers: C7ZZ-17360-6K & C7ZZ-17360-8K

Parts List:

Qty. Description
1 Tachometer Assembly
1 Plastic Spacer/Adapter
1 Wire Harness

Installation Items/Tools:

#2 Phillips Screwdriver Assorted Small Socket Set & Ratchet 15/32 Drill Bit or Uni Bit & Drill
Grinding Bit or Half Moon File Safety Glasses

Installation:

1. Disconnect the negative (ground) cable from the battery.

2. Disconnect the speedo cable from the back of the instrument cluster and remove the (x6) Phillips screws holding
the instrument bezel to the dash. Then, you need to remove the 3/8 nut that is on the back of the cluster over by
the center dash plate. It is a good idea to place a rag on the steering column to prevent scratches.

3. Carefully remove the cluster and unplug the (x2) electrical connectors that connect the instrument cluster harness
to the under dash harness.

4. Place the cluster face down on a towel or a fender cover to protect your instrument bezel. Remove the (x3)
screws that hold the white block off plate or clock assembly to the back of the cluster (Figure 1).

9 screws

Figure 1

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5. Then, remove the (x9) screws that hold the cluster to the plastic instrument bezel and carefully separate the two.
Be careful to not touch the gauge needles and also make sure that you do not loose the cardboard turn signal or
high beam “tubes” (Figures 1 & 2).

Figure 2 - Tubes

6. For now, set the plastic bezel aside.

7. You will need to trim a bit off the top of the metal cluster housing to accommodate your new Drake tach assembly.
Hold the tach up to the metal cluster housing and using a marker, mark where the metal needs to be trimmed.
You can use a metal bit in a die grinder or drill or you can use a half round file. Make sure that you are wearing
safety glasses (Figures 3, 4, & 5).

Figure 3 Figure 4

Figure 5

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8. After you have tested fitment, install the plastic spacer from the front of the cluster and install the screws through
the back of the housing. Do not over-tighten. Then, simply slide the tach through the front of the cluster and align
as to be straight (Figures 6 & 7).

Figure 6 Figure 7

9. Next, you will remove the center, small lens in your instrument bezel and discard or put away. With the bezel face
down and the turn signal tubes in place, lower the instrument cluster down onto the bezel. Pay attention to the
wiper switch arm, as you must line it up to go through the bezel. Now, go ahead and reinstall the (x9) bezel
screws.

10. With the instrument cluster assembly completed, again place it face down and install the wiring. Using the
harness supplied, attach the spade with the red wire on the +. The spade with the black/yellow wire on the S
terminal and the spade with the all black on the -. Then for the light, plug in the black male bullet connector into
the yellow/red female bullet connector and finally the blue/red wire with the female bullet connector into the red
wire with the male bullet connector (Figures 8 & 9).

Figure 8 Figure 9

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11. You will need to drill a 15/32 hole in the firewall for the black/yellow wire with the grommet to connect to the
negative coil. If you are using a MSD ignition or similar, you will need a tach adapter (Figure 10).

Figure 10

12. The red wire with the eyelet connector goes to the post on the back of the ignition switch. That post is key hot.
The blue/red wire connects to the blue/red wire with the red 3 post female connector that is part of the under dash
harness. It is located behind the lighter/radio. That connector is how the radio gets lighted when you turn on the
lights.

13. Connect the black ground wire to the metal support brace that is directly behind the instrument cluster.

14. Now, finally connect the black/yellow wire with the bullet connector that you previously passed through the firewall
that connects to the negative post on the coil or tach adapter (Figures 11 & 12).

Figure 11 Figure 12

15. Now, reinstall the instrument cluster harness (x2) plugs back into the main under dash harness, and reconnect
the speedo cable. Insert the cluster back into the dash and install (x5) screws that hold the instrument cluster to
the dash.

16. Hook back up the ground cable to the battery and enjoy your new Drake tach.

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Wiring Diagrams:

Blue/Red –
dash lights
Red wire – back
of ignition switch

Black Ground

Neg coil –
black/yellow
Black/Yellow –
lead to neg coil
MAIN
HARNESS

Blue/Red to Red
Red wire to + on lamp wire
back of tach

Black/Yellow to
Ground to
“S” terminal on
Yellow/Red for
tach
lamp

Neg on back WIRES TO

of tach
TACH

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Any questions? Please contact Technical Service: 1-866-464-6553 or 270-781-9741. For online help, please refer to: www.holley.com.

© 2022 Scott Drake, Inc. All rights reserved. Tous Droits Réservés.

IS_17360
199R12363
Date: 2-16-22