Front Fog Relay Circuit Low

FRONT FOG RELAY CIRCUIT LOW

Front Fog Relay Circuit Low:

WHEN MONITORED
With the ignition on.

SET CONDITION
BCM detects a low (ground) on the Front Fog Relay even though it is not attempting to turn on the Front Fog Lamps for more than 5 seconds.

POSSIBLE CAUSES
- Front fog relay short to ground
- Front fog relay
- Body control module

DIAGNOSTIC TEST

1. INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all BCM DTC's.
Turn the Fog Lamps on.
With the Scan Tool, read the DTC information.

Q: Does the Scan Tool read: FRONT FOG RELAY CKT LOW?

YES: Go To 2
NO: The condition is not present at this time. Monitor Scan Tool parameters while wiggling the related wire harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. FRONT FOG RELAY SHORT TO GROUND




Turn the ignition off.
Disconnect the Front Fog Relay.
Measure the resistance between ground and the Front Fog Relay Control circuit.

Q: Is the resistance below 5.0 ohms?

YES: Repair the Front Fog Relay Control circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 3

3. FRONT FOG RELAY




Turn the ignition off.
Disconnect the Front Fog Relay harness connector.
Measure the voltage of the Front Fog Relay harness connector coil side feed circuit to ground.

Q: Is the voltage above 10.0 volts?

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