GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Check the TAIL fuse.

Is the fuse open?

--

Go to Step 2

Go to Step 3

2

Repair a short to ground in circuit 301.

Has the repair been made?

--

Go to Exterior Lights System Check

--

3

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

Does the test light illuminate?

--

Go to Step 7

Go to Step 4

4

  1. Turn the headlamp switch to the PARK.
  2. Using a test light, backprobe the headlamp switch harness connector between terminal E 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 .

Has the repair been made?

--

Go to Exterior Lights System Check

--

6

Repair a poor connection or an open in circuit 1340.

Has the repair baleen made?

--

Go to Exterior Lights System Check

--

7

Using a test light, backprobe between the fuse block terminal H7 to ground.

Does the test light illuminate?

--

Go to Step 9

Go to Step 8

8

Repair a poor connection or an open in circuit 74 between S227 and the fuse block harness connector terminal H5.

Has the repair baleen made?

--

Go to Exterior Lights System Check

--

9

Repair a poor connection or an open in circuit 301 between the fuse block terminal H8 and S419.

Has the repair baleen made?

--

Go to Exterior Lights System Check

--