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Ring connector attached to gauge light ground and wire harness ground.
Wire the Tach lighting when wiring the remainder of the Tach.
If after hooking everything up, there are no lights or they are dim, check the Mustang dimmer switch
for adjustment. If dimmer switch is not connected, jumper the two brown wires in the connector or
jumper the brown wire coming out of headlight switch and connect to the blue wire.
Water Temperature Gauge
Remove Ford water temperature gauge sending unit from the lower intake manifold located next to the
distributor on the driver’s side with an
11
/
16
” wrench.
Wrap the adapter threads with Teflon tape. Install the new water temp adapter (short end goes in the
manifold) with a ¾” wrench.
Use the existing wire from the old sending unit and attach a ring connector to the wire and then attach
the connector to the sending unit.
Attach the ground ring connector and positive wire using a ring connector to the gauge. Pick a color
wire for the sending unit wire and connect it to the gauge using a ring connector.
Attach the other end of the same color wire to the Mustang Gray plug #3 (Water temp feed).
Oil Pressure Gauge
Remove the Ford Oil Pressure sending unit from the driver side of the engine in front of the header with
a ¾” wrench.
Assemble the new sending unit per gauge instructions, wrap the threads with teflon tape and install in
engine.
Attach the stock connector to the sending unit.
Attach the ground ring connector and positive wire using a ring connector to the gauge.
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