Dome Lamp Circuit

DOME LAMP CIRCUIT

Dome Lamp Circuit:

WHEN MONITORED
With the ignition on.

SET CONDITION
The Body Control Module (BCM) reports a short to power, ground, or an open on the Dome Lamp circuit.

POSSIBLE CAUSES
- Dome lamp circuit short to voltage
- Dome lamp circuit short to ground
- Dome lamp circuit open
- Body control module internal failure

DIAGNOSTIC TEST

1. MEASURE THE RESISTANCE OF THE DOME LAMP CIRCUIT




Turn the ignition off.
Disconnect the BCM harness connector.
Disconnect the Dome Lamp harness connector.

NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the Dome Lamp circuit between the BCM harness connector and the Dome Lamp harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 2
NO: Repair the Dome Lamp circuit for an open. Perform BODY VERIFICATION TEST. Body Verification Test

2. MEASURE THE VOLTAGE OF THE DOME LAMP CIRCUIT




Turn the ignition on.
Measure the voltage of the Dome Lamp circuit between the Dome Lamp harness connector and Ground.

Q: Is voltage present?

YES: Repair the Dome Lamp circuit for a short to battery. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Go to 3

3. MEASURE THE RESISTANCE OF THE DOME LAMP CIRCUIT




Turn the ignition off.
Measure the resistance of the Dome Lamp circuit between the Dome Lamp harness connector and ground.

Q: Is the resistance below 10K ohms?

YES: Repair the Dome Lamp circuit for a short to ground. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Replace the Body Control Module. Perform BODY VERIFICATION TEST. Body Verification Test