GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you review the Exterior Lighting Systems Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Lighting Systems

2

Verify that the headlamp low beams are inoperative.

Do the headlamp low beams operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the Turn Signal/Headlamp Switch connector.
  2. Connect a fused jumper wire from the Turn Signal/Headlamp Switch connector cavity 13 to ground.

Do the low beams operate?

Go to Step 4

Go to Step 5

4

Replace the Turn Signal/Headlamp Switch. Refer to Headlamp Switch Replacement .

Did you complete the repair?

Go to Step 6

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5

Repair the open in the low beam ground circuit between cavity 13 of the Turn Signal/Headlamp Switch connector and S233. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

Go to Step 6

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6

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3