Diagnostic Routine A

Diagnostic Routine A

Diagnostic Overview

The Courtesy Lamps Do Not Illuminate With a Door Open

Refer to Wiring Diagram Set 117 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Courtesy Lamps .

Visual Inspection and Diagnostic Pre-checks

- Inspect the door for correct latching.

Pinpoint Test

1. CHECK THE OPERATION OF THE COURTESY LAMPS FROM THE FLM (Front Lighting Control Module)

NOTE: Make sure that the dark car feature is not enabled in the BCM (Body Control Module). The dark car feature disables activation of courtesy lamps due to a door unlock, door ajar or removing the key from the ignition cylinder. The feature can be disabled using a scan tool.

1. NOTE: Make sure all the doors are closed.
Ignition OFF.

2. Turn the courtesy lamps on by pressing the courtesy lamp switch on the FLM (Front Lighting Control Module) for approximately 3 seconds.

Do the interior courtesy lamps illuminate?








2. CHECK THE DOOR AJAR SWITCH OPERATION

1. Turn the courtesy lamps off by pressing the courtesy lamp switch for approximately 3 seconds.

2. Disconnect: Suspect Door Latch.

Do the courtesy lamps illuminate?








3. CHECK THE DOOR AJAR SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

1. Disconnect: BCM (Body Control Module) C2280C.

2. Measure:





Is the resistance greater than 10,000 ohms?








4. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Disconnect the BCM (Body Control Module) connectors.

2. Repair:

- corrosion (install new connector or terminals - clean module pins)
- corrosion (install new connector or terminals - clean module pins)
- pushed-out pins - install new pins as necessary

3. Reconnect the BCM (Body Control Module) connectors and make sure they seat and latch correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?