B1607

B1607-HEADLAMP SWITCH INPUT CIRCUIT LOW







- When Monitored:
With the ignition on.

- Set Condition:
The Cluster detects a low 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. HEADLAMP SWITCH




1. Disconnect the Headlamp Switch harness connector.
2. Turn the ignition on.
3. Measure the voltage of the (L116) Headlamp / Fog Lamp Switch Signal circuit.

Does the voltage read 5.0 volts?

Yes

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

No

- Go To 3

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




1. Turn the ignition off.
2. Disconnect the Headlamp Switch harness connector.
3. Disconnect the Instrument Cluster C3 harness connector.
4. Measure the resistance of the (L116) Headlamp Switch Signal circuit to ground.

Is the resistance below 5.0 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.
- Perform the BODY VERIFICATION TEST. Body Verification Test.