Symptom:
FCM-RIGHT TRAIL RELAY OUTPUT CIRCUIT HIGH
POSSIBLE CAUSES
INTERMITTENT CONDITION
FRONT CONTROL MODULE
INTEGRATED POWER MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all FCM DTC’s.
Actuate the Trailer Tow Lamps.
With the DRBIIIt, read the DTC information.
Does the DRBIIIt read: Right Trailer Relay Output Circuit High?
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.
Remove the Front Control Module from the IPM.
Measure the voltage of the Accessory Relay Control circuit and ground.
Is the voltage above 1.0 volts?
All
Yes → Replace the Integrated Power Module.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
354
EXTERIOR LIGHTING
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