B1608

B1608-HEADLAMP SWITCH INPUT CIRCUIT HIGH





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

- When Monitored:
With the ignition on.

- Set Condition:
The Cluster detects a high 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. (L116) HEADLAMP/FOG LAMP SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Headlamp Switch harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (L116) Headlamp Switch MUX circuit.

Is the voltage above 5.0 volts?

Yes

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

No

- Go To 3

3. HEADLAMP SWITCH




1. Turn the ignition off.
2. Connect a jumper wire between ground and the (L116) Headlamp/Fog Lamp Switch Signal circuit at the Headlamp Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read the DTCs.

Does the scan tool display DTC: B1607-HEADLAMP SWITCH INPUT CIRCUIT LOW?

Yes

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

No

- Go To 4

4. (L116) HEADLAMP/FOG LAMP SWITCH SIGNAL CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Cluster C1 harness connector.
3. Measure the resistance of the (L116) Headlamp/Fog Lamp Switch Signal circuit.

Is the resistance below 5.0 Ohms?

Yes

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

No

- Repair the (L116) Headlamp/Fog Lamp Switch Signal circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.