For 1990-2009 cars

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 | --
8 | Replace the appropriate door status indicator. Did you complete the replacement? | Go to Step 9 | --
9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2