B1607

B1607-HEADLAMP SWITCH INPUT CIRCUIT LOW





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

- When Monitored:
With the ignition on.

- Set Condition:
The Cluster detects a low condition in the (L116) Headlamp/Fog Lamp Switch Signal circuit.





1. CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. Turn the Headlamps on.
3. With the scan tool, read the 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.

2. HEADLAMP SWITCH
1. Turn the ignition off.
2. Disconnect the Headlamp Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read the DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

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

3. (L116) HEADLAMP/FOG LAMP SWITCH SIGNAL CIRCUIT SHORTED TO THE (L900) HEADLAMP SWITCH MUX RETURN CIRCUIT




1. Turn the ignition off.
2. Disconnect the Cluster C1 harness connector.
3. Measure the resistance between the (L116) Headlamp/Fog Lamp Switch Signal and the (L900) Headlamp Switch MUX Return circuits.

Is the resistance below 10K Ohms?

Yes

- Repair the short between the (L116) Headlamp/Fog Lamp Switch Signal and the (L900) Headlamp Switch MUX Return circuits.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (L116) HEADLAMP/FOG LAMP SWITCH SIGNAL CIRCUIT SHORTED TO GROUND




1. Measure the resistance between ground and the (L116) Headlamp/Fog Lamp Switch Signal circuit.

Is the resistance below 10K Ohms?

Yes

- Repair short to ground on the (L116) Headlamp/Fog Lamp Switch Signal circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Cluster. Instrument Cluster - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.