Symptom:
FCM-FRONT FOG LAMP RELAY OUTPUT CIRCUIT OPEN
POSSIBLE CAUSES
INTERMITTENT CONDITION
MISSING RELAY
FOG LAMP RELAY
FRONT CONTROL MODULE
FOG LAMP RELAY OUTPUT CIRCUIT OPEN
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all FCM DTC’s.
Turn the Front Fog Lamps on.
With the DRBIIIt, read the DTC information.
Doe the DRBIIIt read: Front Fog Lamp Relay Output Circuit Open.
All
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 BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Check the IPM to make certain the Fog Lamp Relay is present.
Is the Fog Lamp Relay present?
All
Yes → Go To 3
No → Replace the missing Fog Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Install a known good relay in place of the fog lamp relay.
Turn the Fog Lamps On.
Do the Fog Lamps operate normally?
All
Yes → Replace the Fog Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 4
4 Turn the ignition off
Remove the Fog Lamp Relay.
Measure the voltage of the Fused B+ circuit of the fog lamp relay.
Is the voltage above 10 volts?
All
Yes → Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No → Repair the Fog Lamp Relay Output Circuit.
Perform BODY VERIFICATION TEST - VER 1.
327
EXTERIOR LIGHTING
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