FRONT FOG RELAY CIRCUIT HIGH





For a complete wiring diagram Refer to Section 8W


  • When Monitored:

    With the ignition on.

  • Set Condition:

    BCM detects battery on the Front Fog Relay when it is attempting to turn on the Front Fog Lamps for more than 5 seconds. The BCM learns that the Front Fog Options exists on a vehicle when it detects a ground on the Front Fog Switch Input circuit.


Possible Causes
 
MISSING RELAY
 
OPEN FUSE
 
FOG LAMP RELAY
 
BODY CONTROL MODULE
 
FOG LAMP RELAY CONTROL CIRCUIT OPEN
 




Diagnostic Test

1.INTERMITTENT CONDITION






Does the Scan Tool read: FRONT FOG RELAY CKT HIGH?

Yes
  • Go To2


No
  • The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring harness and connector terminals.
  • Perform BODY VERIFICATION TEST - VER 1.

2.MISSING RELAY




Is the Fog Lamp Relay present?

Yes
  • Go To3


No
  • Replace the missing Fog Lamp Relay.
  • Perform BODY VERIFICATION TEST - VER 1.

3.OPEN FUSE




Is the fuse open?

Yes
  • Replace the open fuse.
  • Perform BODY VERIFICATION TEST - VER 1.


No
  • Go To4

4.FOG LAMP RELAY





Do the Fog Lamps operate normally?

Yes
  • Replace the Fog Lamp Relay.
  • Perform BODY VERIFICATION TEST - VER 1.


No
  • Go To5

5.BODY CONTROL MODULE







Is the voltage above 10 volts?

Yes
  • Replace the Body Control Module.
  • Perform BODY VERIFICATION TEST - VER 1.


No
  • Repair the Fog Lamp Relay Control Circuit for an open condition.
  • Perform BODY VERIFICATION TEST - VER 1.