2-1/2 in. Tachometer
3
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4230082
V 2.8
b. Install and crimp or solder
ring terminal (#11) on
tachometer ground (BLACK)
wire. (Fig. 4)
c. Connect tachometer ground
(BLACK) wire to negative (-)
battery terminal or to a good
chassis ground.
d. Connect tachometer power
(RED) wire to a switched
+12V circuit at fuse box,
or splice into any vehicle
harness wire which is
energized ONLY when
ignition key is in ON (RUN)
position.
NOTE:
If necessary, use a splice connector (#6) when
connecting tachometer wires to the vehicle’s wire harness.
Insert the tachometer and vehicle wires (Fig. 5), press down
on the piercing clip to pierce wires, then close and latch
splice connector cover.
e. Connect tachometer lighting (WHITE) wire to panel
lights circuit at fuse box, or splice into any vehicle
harness wire connected to the panel lights circuit.
f. Connect tachometer signal (GREEN) wire to
appropriate vehicle tachometer signal source.
NOTE:
Tachometer signal (GREEN) wire connections vary with vehicle make, model, and ignition
type. Typical tachometer signal source locations are shown in the accompanying illustrations. (Fig. 6)
Always consult the service manual for the vehicle you are working on to ensure proper connection.
g. Secure lead wires along their route to prevent damage from sharp edges, moving parts or
hot engine components.
h. Start engine and let it run. Rev engine several times and verify tachometer indication
changes as RPMs increase and decrease. Make sure tachometer pointer operation is smooth
and even.
5. Install tachometer on mounting bracket, and secure with tachometer nut.
6. A red RPM pointer (#13) has been provided with this tachometer. You may use this as an
optional shift indicator or max. speed (redline) indicator.
Fig. 4
Fig. 5
