Low Beam Relay Circuit Low

LOW BEAM RELAY CIRCUIT LOW

For a complete wiring diagram refer to Diagrams/Electrical

- When Monitored:

With ignition on.

- Set Condition:

BCM detects a low (ground) on the Low Beam Relay even though it is not attempting to turn on the Low Beams for more than 5 seconds.





Diagnostic Test

1. INTERMITTENT CONDITION

Turn the ignition on.

With the scan tool, clear all BCM DTC's.

Turn the Low Beams on.

With the scan tool, read the DTC information.

Does the scan tool read: LOW BEAM RELAY CKT LOW?

Yes

- Go To 2

No

- The condition is not present at this time. Monitor DRBIII 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. LOW BEAM RELAY SHORT TO GROUND

Turn the ignition off.

Disconnect the Low Beam Relay.

Measure the resistance between ground and the Low Beam Relay Control circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the Low Beam Relay Control circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3

3. LOW BEAM RELAY

Turn the ignition off.

Disconnect the Low Beam Relay harness connector.

Measure the voltage of the Low Beam Relay harness connector coil side feed circuit to ground.

Is the voltage above 10.0 volts?

Yes

- Replace the Low Beam 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