GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Are all of the front side marker and front park lamps inoperable?

Go to Step  2

Go to Step  3

2

Repair the poor connection or an open in circuit 9 between S204 and S119.

Is the repair complete?

Go to Exterior Lights System Check

--

3

Is the inoperative lamp a front side marker lamp?

Go to Step  4

Go to Step  9

4

  1. Turn the headlamp switch to the PARK position.
  2. Using a test lamp, backprobe between the inoperable front side marker lamp harness connector terminal A and ground.

Does the test lamp illuminate?

Go to Step  6

Go to Step  5

5

Repair the poor connection or an open in circuit 9 between S119 and the inoperable front side marker lamp terminal  A.

Is the repair complete?

Go to Exterior Lights System Check

--

6

Using a test lamp, backprobe the inoperable front side marker lamp harness connector between terminal  A and terminal  B.

Does the test lamp illuminate?

Go to Step  7

Go to Step  8

7

Replace the inoperative side marker lamp Side Marker Lamp Replacement .

Is the repair complete?

Go to Exterior Lights System Check

--

8

Repair the poor connection or an open in circuit 14 between S136 and the Left Front (LF) side marker lamp harness connector terminal B.

Is the repair complete?

Go to Exterior Lights System Check

--

9

Using a test lamp, backprobe the inoperable front park/turn lamp harness connector between terminal B to ground.

Does the test lamp illuminate?

Go to Step  11

Go to Step  10

10

Repair the poor connection or an open in circuit 9 between S119 and the inoperable front park/turn lamp.

Is the repair complete?

Go to Exterior Lights System Check

--

11

Replace the park/turn signal lamp. Refer to Parking and Turn Signal Lamp Replacement .

Is the repair complete?

Go to Exterior Lights System Check

--