15-Step A, System Power Supplies (No Code 88)

1. Place ignition switch in OFF position.
2. Connect a digital voltmeter between terminal 1 of the logic module white electrical connector and ground.
3. Place ignition switch in the On position and note voltmeter reading.
4. If voltmeter reading is minimum of 4 1/2 volts, proceed to Test 15 step B.
5. If voltmeter reading is 0 volts, proceed to Test 15 step D.