Test 5, Supply Voltage Circuit

1. Reconnect coil wire to distributor cap (if still removed).
a. If starter relay is equipped with a I terminal, disconnect starter cable from starter relay.
b. If starter relay is equipped with a S terminal, disconnect S wire from relay.
2. With ignition ``Off,'' install straight pins into module red and white wires. Do not allow straight pins to contact engine ground.
3. Using a suitable voltmeter, connect negative lead to ground at distributor base.
a. With ignition in ``On'' position, measure voltage at red wire pin.
b. Place ignition in ``Start'' position, measure voltage at white wire pin and at coil Batt. terminal. When measuring voltages, wiggle wires to simulate any open circuits that might exist.
4. If readings obtained are 90% of battery voltage or greater, supply circuits are satisfactory. Proceed to test 6.
5. If readings obtained are less than 90% of battery voltage:
a. Defective wiring harness or connectors in supply voltage circuits.
b. Defective ignition switch.
c. Defective radio interference capacitor on ignition coil.