Coil Primary Circuit
- Connect voltmeter positive lead to coil positive terminal and negative lead to ground. With ignition on, reading should be 5.5-6.5 volts. If voltage is high, proceed to step 3). If voltage is low, disconnect capacitor lead. If voltage is now correct, replace capacitor. If voltage remains low, proceed to step 6).
- If voltage was 5.5-6.5 volts in step 1), turn ignition switch to "START" position. Voltage should be the same as battery cranking voltage. If not, check wire connected to starter solenoid "I" terminal for shorts or opens. If wire is okay, check for defective starter solenoid. Replace if necessary.
- With ignition on, disconnect wire connected to starter solenoid "I" terminal and measure voltage at coil positive terminal. If voltage drops to 5.5-6.5 volts, replace starter solenoid. If voltage does not drop, connect a jumper wire from coil negative terminal to ground. If voltage drops to 5.5-6.5 volt range, proceed to step 4). If voltage does not drop, resistance wire is defective. Replace resistance wire and retest.
- Turn ignition off and connect ohmmeter lead to coil negative terminal. Connect the other lead to terminal "D4" of the 4-wire harness connector. If continuity exists, replace the control unit. Check wiring from terminal "D1" to ground. If there is no continuity, repair open wire in harness and retest beginning at step 2).
- With ignition off, connect ohmmeter leads between coil positive terminal and dash connector "FW". If resistance is not 1.3-1.4 ohms, replace resistance wire. If ohmmeter reading is correct, connect ohmmeter leads between dash connector "FW" and ignition switch terminal "L1".
- If resistance is less than 0.1 ohm, repair feed wire or replace ignition switch. If resistance is more than 0.1 ohm, check for opens in wire or for poor connections at connectors. Repair or replace as necessary.