GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Interior Lights Schematics

Connector End View Reference: Master Electrical Component List in Wiring Systems

1

Did you perform the Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Turn the ignition switch to the ON position.
  2. Turn the dimmer switch to the DOME position.

Do the courtesy lamps operate from the interior lamp switch?

Go to Step 3

Go to Courtesy Lamps Inoperative

3

  1. Place the ignition in the OFF position.
  2. Turn the dimmer switch to the OFF position.
  3. Lift each front door handle one at a time waiting for the courtesy lamps to turn OFF before lifting the next door handle.
  4. Observe the courtesy lamps.

Do the courtesy lamps illuminate for each door?

Go to Step 4

Go to Step 12

4

  1. Turn the ignition to the OFF position.
  2. From the inside of the vehicle, open and close each door one at a time waiting for the courtesy lamps to turn off before opening the next door.
  3. Observe the courtesy lamps.

Do the courtesy lamps illuminate for each door?

Go to Step 5

Go to Step 7

5

  1. Unlock the vehicle doors using the Remote Keyless Entry (RKE) system.
  2. Observe the courtesy lamps.

Do the courtesy lamps illuminate?

Go to Step 6

Go to Step 8

6

  1. Turn the ignition to the ON position.
  2. Turn the ignition in the OFF position.
  3. Remove the ignition key.
  4. Observe the courtesy lamps.

Do the courtesy lamps illuminate?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 10

7

Probe the ground circuit of the inoperative door handle switch with a test lamp that is connected to battery positive voltage.

Does the test lamp illuminate?

Go to Step 9

Go to Step 13

8

Does the Remote Keyless Entry (RKE) doors unlock operate properly?

Go to Step 14

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

9

Test for an open, high resistance or a short to battery positive in the inoperative door handle switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 15

10

  1. Turn the ignition in the OFF position.
  2. Leave the ignition key in the ignition.
  3. Open the driver door.

Does the key in ignition audible chime sound?

Go to Step 11

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

11

  1. Turn the ignition to the OFF position.
  2. Remove the ignition key in the ignition.
  3. Open the driver door.

Does the key in ignition audible chime sound?

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Go to Step 14

12

Test for an open, high resistance or short to battery positive in the front exterior door handle switch signal circuit of the inoperative front door handle. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 15

13

Repair an open, high resistance, or a short to battery positive voltage in the ground circuit of the door handle switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 16

--

14

Important: After replacing the BCM, perform the setup procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.

Replace the BCM. Refer to Body Control Module Replacement in Computer/Integrating Systems.

Did you complete the repair?

Go to Step 16

--

15

Replace the door module. Refer to Door Control Module Replacement in Doors.

Did you complete the repair?

Go to Step 16

--

16

  1. Connect all connector and components that were disconnected.
  2. Operate the system in order to verify the repair.

Does the system operate properly?

System OK

Go to Step 2