Circuit 121, 121A

CIRCUIT 121

Type:
White 22 gage wire.


CIRCUIT 121A

Location:
Circuit 121A connects E1 module cavity E to engine I/P inline connector cavity E Circuit 121 connects engine I/P inline connector cavity F to I/P cluster cavity L.

Type:
White 20 gage wire.

Function:
Supplies a square wave signal from the E1 module to the I/P cluster for use by the tachometer.

Repairs:
Check the circuit feeding the tach signal from the E1 to the cluster by testing for signal voltage along Circuit 121A. If voltage is zero, the circuit is open.

Repair as needed.

If this component is good, go to the next item indicated on the Symptom Chart.