GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

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.

Has the repair been made?

--

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 light, backprobe between the inoperable front side marker lamp harness connector terminal A and ground.

Does the test light 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.

Has the repair been made?

--

Go to Exterior Lights System Check

--

6

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

Does the test light illuminate?

--

Go to Step 7

Go to Step 8

7

Replace the inoperative side marker lamp Front Side Marker Lamp Replacement .

Has the repair been made?

--

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.

Has the repair been made?

--

Go to Exterior Lights System Check

--

9

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

Does the test light 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.

Has the repair been made?

--

Go to Exterior Lights System Check

--

11

Replace the park/turn signal lamp. Refer to Park/Turn Signal Lamp Bulb Replacement .

Has the repair been made?

--

Go to Exterior Lights System Check

--