Wiring Harness & Connector
CAUTION:
When removing or installing wiring connector, ignition switch must be in "OFF" position.
Measure voltage across battery terminals, record this measurement. Turn ignition switch "OFF", then disconnect harness connector from control unit. Connect voltmeter negative lead to a good ground and then turn ignition "ON". Make checks as follows.
- Connect voltmeter positive lead to harness connector pin 1 (pin 2 on 4-cyl.). Reading should be battery voltage. If not, check and repair wire/components from harness connector back to battery. Refer to Fig. 1 or Fig. 2.
- Connect voltmeter to harness connector pin 2 (pin 5 on 4-cyl.). Voltmeter reading should be battery voltage. If reading is not to specifications, check and repair wire or components from harness connector through coil and ignition switch back to battery.
- If reading jumps to battery voltage on the positive side of the coil, make primary and secondary checks on coil. If coil is bad, replace it. Also check ballast resistor on V8 and 6 cylinder models. To make this check, disconnect wires from resistor, then make an ohmmeter reading. Resistance should be 1.1 to 1.3 ohms. If reading is not as specified, replace resistor.