B1660

B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH





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

- When Monitored:
With the Front Fog Lamps activated.

- Set Condition:
When the Front Control Module (FCM) detects a high condition in the fog lamp relay control circuit.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all FCM DTCs.
3. Actuate the Front Fog Lamps.
4. With the scan tool read the DTCs.

Does the Scan Tool read: B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH?

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. FOG LAMP RELAY
1. Turn the ignition off.
2. Remove and install a known good relay in place of the Fog Lamp Relay.

Do the Fog Lamps operate normally?

Yes

- Replace the Fog Lamp Relay.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. FRONT CONTROL MODULE (FCM)




1. Turn the ignition off.
2. Remove the Fog Lamp Relay from the PDC.
3. Disconnect the 49 way FCM IPM harness connector.
4. Turn the ignition on.
5. Measure the voltage of the (L139) Fog Lamp Relay Output circuit in the 49 way FCM IPM harness connector.

Is the voltage above 1.0 volt?

Yes

- Replace the Integrated Power Module (IPM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Front Control Module (FCM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.