GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

Connect an unpowered test lamp between the headlamp switch connector, cavity H for CKT 240 (BRN), and ground.

Does the test lamp light?

--

Go to Step 4

Go to Step 3

3

Repair the open in CKT 240 (BRN) between the instrument panel fuse block and the headlamp switch.

Are all of the park lamps operative?

--

Go to Exterior Lights System Check

Go to Step 4

4

  1. Place the headlamp switch in the park lamps position.
  2. Connect an unpowered test lamp between the headlamp switch connector, cavity S, and ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

Repair the open in CKT 9 (BRN) between the headlamp switch and splice S225.

Are all of the park lamps operative?

--

Go to Exterior Lights System Check

Go to Step 6

6

Replace the headlamp switch.

Are all of the park lamps operative?

--

Go to Exterior Lights System Check

--