Dome Switch Input Short-BCM

DOME SWITCH INPUT SHORT-BCM





For a complete wiring diagram refer to Diagrams/Electrical.





Diagnostic Test

1. INTERMITTENT CONDITION

Turn the ignition on.

With the scan tool, clear all BCM DTC's.

Turn the Dome Lamps on.

With the scan tool, read the DTC information.

Does the scan tool display: Dome Switch Input Short?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

2. (E2) PANEL LAMPS DIMMER SIGNAL CIRCUIT SHORT TO GROUND





Turn the ignition off.

Disconnect the Headlamp Switch harness connector.

Disconnect the Body Control Module C5 connector.

Measure the resistance of the (E2) Panel Lamps Dimmer Signal Circuit to ground.

Is the resistance below 1000 ohms?

Yes

- Repair the (E2) Panel Lamps Dimmer Signal Circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3

3. HEADLAMP SWITCH





Turn the ignition off.

Disconnect the Headlamp Switch harness connector.

Measure the resistance of the (E2) Panel Lamps Dimmer Signal Circuit and the (L900) Headlamp Switch MUX Return Circuit to ground.

Is the resistance below 1000 ohms?

Yes

- Replace the Headlamp Switch.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Body Control Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test