B1609-15

B1609-15-PANEL DIMMER INPUT - CIRCUIT SHORT TO BATTERY OR OPEN





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
The Body Control Module (BCM) detects that the Panel Dimmer Input signal is greater than 4.8 volts for more than one second.





1. CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. Activate the Panel Dimmer Switch.
3. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE (E2) PANEL LAMPS DIMMER SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Dimmer Switch harness connector.
3. Disconnect the BCM G harness connector.
4. Turn the ignition on.
5. Measure the voltage on the (E2) Panel Lamps Dimmer Signal circuit at the Dimmer Switch harness connector.

Is there any voltage present?

Yes

- Repair the short to voltage in (E2) Panel Lamps Dimmer Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (E2) PANEL LAMPS DIMMER SIGNAL CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Measure the resistance of the (E2) Panel Lamps Dimmer Signal circuit between the Dimmer Switch harness connector and the BCM G harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the open in the (E2) Panel Lamps Dimmer Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE OPERATION OF THE PANEL LAMPS DIMMER SWITCH
1. Reconnect the BCM G harness connector.
2. Connect a jumper wire at the Dimmer Switch harness connector between the (E2) Panel Lamps Dimmer Signal circuit and ground.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the scan tool display DTC: B1609-11-PANEL DIMMER INPUT - CIRCUIT SHORT TO GROUND as active?

Yes

- Replace the Dimmer Switch. Dimmer Switch - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the BCM. Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.