Symptom:
FCM-PARK LAMP RELAY OUTPUT CIRCUIT LOW
POSSIBLE CAUSES
INTERMITTENT CONDITION
PARK LAMP RELAY
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all FCM DTC’s.
Turn the Park Lamps on.
With the DRBIIIt, read the DTC information.
Does the DRBIIIt read: Park Lamp Relay Output Circuit Low?
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.
Install a know good relay in place of the Park Lamp Relay.
Turn the ignition on.
Actuate the Park Lamps.
Do the Park Lamps operate normally?
All
Yes → Go To 3
No → Replace the Park Lamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off
Remove the Park Lamp Relay.
Remove the FCM from the IPM.
Measure the resistance between ground and the Park Lamp Relay control circuit in
the IPM.
Is the resistance below 5.0 ohms?
All
Yes → Replace the Power Distribution Center(PDC).
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
342
EXTERIOR LIGHTING
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