Twilight Sentinel Photo Sensor Malfunction
- Disconnect twilight photocell connector. Turn ignition on. Measure voltage between photocell harness connector terminal "A" (White wire) and ground. If voltage is not greater than 5 volts, go to next step. If voltage is greater than 5 volts, repair short circuit to voltage in White wire.
- Turn ignition off. Measure resistance between twilight photocell terminal "A" (White wire) and ground. If resistance is not 6 ohms or less, go to next step. If resistance is 6 ohms or less, repair short to ground in White wire.
- Measure resistance between twilight photocell terminal "B" (Black wire) and ground. If resistance is 5 ohms or less, replace IPC. If resistance is not 5 ohms or less, repair open circuit in Black wire.