GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Daytime Running Lamps (DRL) Check?

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Go to Step 2

Go to Daytime Running Lights (DRL) System Check

2

  1. Turn the combination switch to the HEAD position.
  2. Move the dimmer switch in the HI position.
  3. Using a test lamp, backprobe the junction block connector C3 from cavity 6 to B+.

Does the test lamp light?

--

Go to Step 3

Go to Step 5

3

Inspect for an open in the RED wire between S107 and the junction block.

Is the connection OK?

--

Go to Step 4

Go to Step 6

4

Replace the junction block.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

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5

Replace the combination switch. Refer to Inflatable Restraint Steering Wheel Module Coil Replacement in SIR.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

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6

Repair the open in the RED wire between S107 and the junction block. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

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