GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the headlamp switch harness connector.

Are the exterior lamps on?

--

Go to Step 3

Go to Step 2

2

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Has the repair been made?

--

Go to Headlight System Check

--

3

Disconnect the connectors C1 and C2 at the DRL control module.

Are the exterior lamps on?

--

Go to Step 5

Go to Step 4

4

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

Has the repair been made?

--

Go to Headlight System Check

--

5

Repair a short to B+ on circuit 9.

Has the repair been made?

--

Go to Headlight System Check

--