GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Backprobe the left headlamp with a fused jumper from terminal B to ground.

Does the headlamp light?

--

Go to Step 2

Go to Step 3

2

Repair the open in CKT 691 (RED/BLK) between the left headlamp and S315.

Does the headlamp light?

--

System OK

--

3

Replace the left headlamp.

Does the headlamp light?

--

System OK

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