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 Headlamp/fog lamp switch signal circuit.





1. CHECK FOR ACTIVE 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

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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 / Fog Lamp Switch Signal circuit.

Is the voltage above 10.0 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. Disconnect the Headlamp Switch harness connector.
3. Connect a jumper wire to the (L116) Headlamp / Fog Lamp Switch Signal circuit at the Headlamp Switch harness connector.
4. Turn the ignition on.
5. With the scan tool, read the DTCs.

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

Yes

- Replace the Headlamp Switch.
- 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 Headlamp Switch harness connector.
3. Disconnect the Cluster C3 harness connector.
4. Measure the resistance of the (L116) Headlamp / Fog Lamp Switch Signal circuit.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Cluster.
- 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.