FCM-Front Fog Lamp Relay Output Circuit Open

FCM-FRONT FOG LAMP RELAY OUTPUT CIRCUIT OPEN

FCM - Front Fog Lamp Relay Output Circuit Open:

WHEN MONITORED
With the ignition on

SET CONDITION
The FCM detects an OPEN condition

POSSIBLE CAUSES
- Missing relay
- Fog lamp relay
- Output circuit open
- Front control module

1. INTERMITTENT CONDITION




Turn the ignition on.
With the DRBIII(R), clear all FCM DTC's.
Turn the Front Fog Lamps on.
With the DRBIII(R), read the DTC information.

Q: Does the DRBIII(R) read: Front Fog Lamp Relay Output Circuit Open?

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. Body Verification Test

2. MISSING RELAY
Turn the ignition off.
Check the IPM to make certain the Fog Lamp Relay is present.

Q: Is the Fog Lamp Relay present?

YES:Go To 3
NO: Replace the missing Fog Lamp Relay. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. FOG LAMP RELAY




Turn the ignition off.
Install a known good relay in place of the fog lamp relay.
Turn the Fog Lamps On.

Q: Do the Fog Lamps operate normally?

YES: Replace the Fog Lamp Relay. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4

4. FRONT CONTROL MODULE




Turn the ignition off.
Remove the Fog Lamp Relay.
Measure the voltage of the Fused B+ circuit of the fog lamp relay.
Q: Is the voltage above 10 volts?

YES: Replace the Front Control Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Repair the Fog Lamp Relay Output Circuit. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test