Cornering Lamps Malfunction

Cornering Lamps Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

The turn signal switch sends battery positive voltage to the cornering lamps which will constantly remain illuminated until turn signal operation is cancelled. The cornering lamps are grounded at G103 and G107.

Diagnostic Aids

Verify normal operation of the park lamps.

Circuit/System Verification

Ignition ON, park lamps ON, operate the left and right turn signals and verify operation of the left and right cornering lamps.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X1 at the turn signal/multifunction switch.
2. Ignition ON, and park lamp switch ON, verify that a test lamp illuminates between the park lamp control circuit terminal E and ground.

^ If the test lamp does not illuminate, test the park lamp control circuit for a short to ground or an open/high resistance.

3. Disconnect the harness connector at the affected cornering lamp bulb.
4. Test for less than 1 ohm between the ground circuit terminal G and ground.

^ If greater than the specified range, test the ground circuit for an open/high resistance.

5. Connect the harness connector cornering lamp bulb.
6. Park lamps ON, connect a 10A fused jumper wire between the park lamp control circuit terminal E and the cornering lamp control circuit terminals D and F. Verify the cornering lamps illuminate.
7. If either cornering lamp does not illuminate, test the affected control circuit for an open/high resistance. If the circuit tests normal replace the cornering lamp bulb.
8. If all circuits test, normal replace the turn signal/multifunction switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Cornering Lamp Bulb Replacement (Envoy)
* Turn Signal Multifunction Switch Replacement