GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Vehicle Access Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Install a scan tool.
  2. Turn on the ignition switch, with the engine OFF.
  3. Open the door with the inoperative door status indicator.
  4. With a scan tool, observe the lock switch indicator command parameter in the appropriate door control module data list.

Does the scan tool cycle between On/Off?

Go to Step 3

Go to Step 5

3

Test the appropriate door lock status indicator voltage supply circuit for an open, short to ground, or short to battery voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 4

4

Test the appropriate door lock status indicator signal ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 6

5

Inspect the poor connections at the appropriate door control module harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 7

6

Inspect for poor connections at the harness connector of the appropriate door status indicator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

7

Replace the appropriate door control module. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 9

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8

Replace the appropriate door status indicator.

Did you complete the replacement?

Go to Step 9

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9

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2