Control Unit Power Feed Check
NOTE:
Always check ignition coil primary circuit first before making this check.
- Disconnect 2-wire connector at control unit. Connect voltmeter negative lead to ground and positive lead to harness connector terminal "F2". If reading is the same as battery voltage, with ignition on, replace control unit. If not, proceed to next step.
- Connect voltmeter negative lead to ground and positive lead to Light Blue wire at harness connector terminal "F1" in 2-wire connector. Crank engine. Voltmeter reading should be within one volt of battery cranking voltage. If not, check for bad connections, ignition switch or starter solenoid.
- Turn ignition switch off. Connect 2-wire connector and disconnect 4-wire connector. Attach ammeter between ground and Black wire terminal "C1" on control unit side of connector. With ignition on, reading should be 0.9-1.1 amps. If reading is other than specified, replace control unit.