GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Exterior Lights System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

Is vehicle equiped with Remote Keyless Entry?

--

Go to Step 3

Go to Step 6

3

Disconnect the remote control door lock receiver connector.

Did the lamps stop illuminating?

--

Go to Step 5

Go to Step 4

4

Test the LT GRN/BLK wire between junction block 2, the remote control door lock receiver, and the daytime running lamps (DRL) control module for a short to ground.

Is the wire shorted to ground?

--

Go to Step 7

Go to Step 6

5

Replace the remote control door lock receiver. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry.

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Test the LT GRN/BLK wire between the daytime running lamps (DRL) control module and the turn signal/headlamp switch for a short to ground.

Is the wire shorted to ground?

--

Go to Step 7

Go to Step 8

7

Repair the wire. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

8

Disconnect the turn signal/headlamp switch connector.

Did the lamps stop illuminating?

--

Go to Step 9

Go to Step 10

9

Replace the turn signal/headlamp switch. Refer to Turn Signal Switch Replacement - On Vehicle in Power Steering Systems.

Is the replacement complete?

--

Go to Exterior Lights System Check

--

10

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

Is the repair complete?

--

Go to Exterior Lights System Check

--