GM Service Manual Online
For 1990-2009 cars only

Side Marker Lamp Inoperative - One Lamp Left

Step

Action

Value(s)

Yes

No

1

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

Does the test lamp light?

Go to Step 2

Go to Step 3

2

Repair the open in left door side marker lamp assembly.

Is the repair complete?

System OK

--

3

Connect a test lamp between terminal A and ground on the left 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.
  2. Connect a test lamp between terminals A and D on the lower IP harness connector C501.

Does the test lamp light?

Go to Step 6

Go to Step 7

5

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

Is the repair complete?

System OK

--

6

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

Is the repair complete?

System OK

--

7

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

Is the repair complete?

System OK

--

Side Marker Lamp Inoperative - One Lamp Right

Step

Action

Value(s)

Yes

No

1

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

Does the test lamp light?

Go to Step 2

Go to Step 3

2

Repair the open in right door side marker lamp assembly.

Is the repair complete?

System OK

--

3

Connect a test lamp between terminal A and ground on the 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 C601.
  2. Connect a test lamp between terminals A and D on the lower IP harness connector C601.

Does the test lamp light?

Go to Step 6

Go to Step 7

5

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

Is the repair complete?

System OK

--

6

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

Is the repair complete?

System OK

--

7

Locate and repair the open in CKT 69, CKT 650 or CKT 22 (BLK) between G105 and terminal D in the lower IP harness connector C601.

Is the repair complete?

System OK

--