GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Headlamp Diagnostic System Check performed?

--

Go to Step 2

Go to Headlight System Check

2

Check the DRL fuse located in the fuse block.

Is the DRL fuse open?

--

Go to Step 4

Go to Step 3

3

  1. Turn the ignition switch to the ON position.
  2. Using a test lamp, backprobe between the Daytime Running Lamp (DRL) control module connector C2 terminal C and ground.

Is the test lamp on?

--

Go to Step 5

Go to Step 6

4

Repair short to ground in circuit 1239.

Is the repair complete?

--

Go to Headlight System Check

--

5

Replace the DRL control module. Refer to Daytime Running Lights (DRL) Control Module Replacement for service procedure.

Is the repair complete?

--

Go to Headlight System Check

--

6

Repair poor connection or open in circuit 1239.

Is the repair complete?

--

Go to Headlight System Check

--