Courtesy Lamps Inoperative. Buick GL7 (Export) 2000

For 1990-2009 cars

Step | Action | Yes | No
DEFINITION: None of the interior lights activate when the instrument panel (IP) dimmer switch is in the DOME position.
1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems

2

1. Turn ON the Interior Lamps Override Switch (interior lamps enabled).
2. Turn the Headlamp and IP Lamp Dimmer Switch to the DOME position.

Are the courtesy lamps illuminated?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Perform the BCM Input/Output test. Refer to On-Board Diagnostic Features In Body Control System.

NOTE: While the BCM is performing the Input/Output test, the chime sounds when any of the BCM inputs is activated. Example: The chime sounds when any Door is opened.

Does the BCM enter the Input/Output test?

Go to Step 4

Go to Step 6

4

1. Cycle the IP dimmer switch from the DOME position to the OFF position and back to the DOME position in order to move to test 2.
2. Turn ON the Roof Rail Reading Lamps and the Sunshade Lighted Vanity Mirror Lamps.

Do the Roof Rail Reading Lamps and the Sunshade Lighted Vanity Mirror Lamps illuminate?

Go to Step 5

Go to Step 7

5 | Test the Courtesy Lights Control Output circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 8

6

Test the Interior Lights On Request Input circuit for an open or an inoperative headlamp and IP lamp Dimmer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

If the Headlamp and IP Lamp Dimmer Switch is inoperative, refer to Headlamp Switch Replacement .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Test the Protected B+ Output Courtesy Lights circuit for an open or for an inoperative Interior Lamps Override Switch . Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

If the Interior Lamps Override Switch is inoperative, refer to Dome Lamp Override Switch Replacement .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

8

1. Inspect the BCM connectors for faulty terminal contacts. Refer to Testing for Intermittent Conditions and Poor Connections or Connector Repairs in Wiring Systems.
2. If the BCM connectors are OK, replace the BCM. Refer to Body Control Module Replacement in Body Control Systems.

Did you find and correct the condition?

Go to Step 9

--

9

1. Turn the ignition switch to the LOCK position.
2. Reinstall any connectors/components that were previously removed.
3. Operate the system to verify the repair

Did you find and correct the condition?

System OK

Go to Step 2