GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Inspect fuse H5-H6.

Is the fuse open?

--

Go to Step 2

Go to Step 3

2

Repair a short to ground in circuit 9.

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

--

3

  1. Place the headlamp switch to PARK.
  2. Using a test light, backprobe between the underhood accessory wiring junction block harness connector C2 terminal F8 and ground.

Does the test light illuminate?

--

Go to Step 5

Go to Step 4

4

Repair a poor connection or an open circuit 9 between the fuse block terminal H6 and the underhood accessory wiring junction block harness connector C2 terminal F8.

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

--

5

Replace the underhood accessory wiring junction block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - Lighting Systems

--