B1660
B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGHB1660-Front Fog Lamp Control Circuit High:
WHEN MONITORED
With the Front Fog Lamps activated.
SET CONDITION
When the FCM detects a HIGH condition.
POSSIBLE CAUSES
- Front fog lamp relay
- Module-power distribution
- Front control module
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
DIAGNOSTIC TEST
1. INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all FCM DTC's.
Actuate the Front Fog Lamps.
With the Scan Tool read the DTC information.
Q: Does the Scan Tool read: B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH?
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 the BODY VERIFICATION TEST - VER 1. Body Verification Test
2. FRONT FOG LAMP RELAY
Turn the ignition off.
Remove and install a known good relay in place of the Front Fog Lamp Relay.
Q: Do the Front Fog Lamps operate normally?
YES: Replace the Front Fog Lamp Relay. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3
3. FRONT CONTROL MODULE
Turn the ignition off.
Remove the Front Fog Lamp Relay from the MPD.
Remove the FCM from the Module Power Distribution.
Measure the voltage of the (L139) Front Fog Lamp Relay Output circuit and ground.
Q: Is the voltage above 1.0 volts?
YES: Replace the Module Power Distribution center. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Module Front Control. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test