GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Inspect the PARK LAMP fuse for an open.

Is the fuse open?

--

Go to Step 2

Go to Step 3

2

Repair a short to ground in CKT 1340.

Is the repair complete?

--

Go to Exterior Lights System Check

--

3

  1. Turn the headlamp switch to the PARK position.
  2. Using a test light, backprobe the headlamp switch harness connector between terminal R and ground.

Does the test light illuminate?

--

Go to Step 7

Go to Step 4

4

Using a test light, backprobe the headlamp switch harness connector between terminal O and ground.

Does the test light illuminate?

--

Go to Step 5

Go to Step 6

5

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Repair a poor connection or open in CKT 1340.

Is the repair complete?

--

Go to Exterior Lights System Check

--

7

Repair a poor connection or open in CKT 9 between the headlamp switch harness connector terminal R and S204.

Is the repair complete?

--

Go to Exterior Lights System Check

--