GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Backprobe the headlamp switch with a test lamp from terminal 5 to B+.

Did the test lamp light?

--

Go to Step 2

Go to Step 3

2

Replace the headlamp switch.

Is the repair complete?

--

System OK

--

3

Repair the open in CKT 86 (BLK) between the headlamp switch and G105.

Is the repair complete?

--

System OK

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