GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Set the headlamp switch to the PARK position.
  2. Disconnect the left/right door harness side marker lamp connector in the left/right door outer trim panel.
  3. Connect a test lamp between terminals A and B in the left/right door harness side marker lamp connector.

Does the test lamp light?

Go to Step 2

Go to Step 3

2

Replace the left/right door side marker lamp.

Is the repair complete?

System OK

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3

Connect a test lamp between terminal A and ground on the left/right door harness side marker lamp connector.

Does the test lamp light?

Go to Step 4

Go to Step 5

4

  1. Disconnect the harness connector C501/C601.
  2. Connect a test lamp between terminals A and D on the lower IP harness connector C501/C601.

Does the test lamp light?

Go to Step 6

Go to Step 7

5

Repair the open in CKT 88/CKT 89 (BRN) between S321/S320 and terminal A in the lower IP harness connector C501/C601.

Is the repair complete?

System OK

--

6

Repair the open in CKT 4/CKT 21 (BLK) between terminal D on the left/right door harness connector C501/C601 and the left/right door harness side marker lamp connector.

Is the repair complete?

System OK

--

7

Locate and repair the open in CKT 68/CKT 69 (BLK) between G105 and terminal D in the lower IP harness connector C501/C601.

Is the repair complete?

System OK

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