B1633

B1633-LEFT HI BEAM CONTROL CIRCUIT LOW





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
- With the Headlamps activated.
- Set Condition:
- When the FCM detects a LOW condition.





Diagnostic Test

1. INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all FCM DTC's.
Turn the Highbeam Headlamps on.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B1633-LEFT HI BEAM CONTROL CIRCUIT LOW?

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. (L33) LEFT HIGHBEAM OUTPUT CIRCUIT




Turn the ignition off.
Disconnect the FCM C2 harness connector.
Disconnect the Left Headlamp harness connector.
Measure the resistance between ground and the Left Highbeam Output circuit.
Is the resistance below 5.0 ohms?

Yes

- Repair the (L33) Left Highbeam Output circuit for a short to ground condition.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Front Control Module (FCM).
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test