GM Service Manual Online
For 1990-2009 cars only

Daytime Running Lamps (DRL) Headlamps Always On Domestic

Step

Action

Value(s)

Yes

No

1

Was the entire Headlight System Check performed?

--

Go to Step 2

Go to Headlight System Check

2

Disconnect the dash integration module (DIM) connector C1.

Do the daytime running lamps (DRL) turn off?

--

Go to Step 8

Go to Step 3

3

Disconnect the underhood junction block connector C2.

Does the DRL turn off?

--

Go to Step 9

Go to Step 4

4

Remove the DRL relay from the underhood junction block .

Does the DRL turn off?

--

Go to Step 10

Go to Step 5

5

  1. Disconnect the underhood junction block connector C1.
  2. Remove terminal A9 from the underhood junction block connector C1.
  3. Reconnect the underhood junction block connector C1.

Does the DRL turn off?

--

Go to Step 7

Go to Step 6

6

Repair the short to battery positive voltage (B+) in CKT 1200 (PNK) between the underhood junction block and the LH high beam headlamp. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--

7

Replace the underhood junction block . Refer to Underhood Fuse Block Replacement in Engine Electrical.

Is the underhood junction block replacement complete?

--

Go to Headlight System Check

--

8

Replace the dash integration module (DIM). Refer to Body Control Module Replacement in Body Control System.

Is the DIM replacement complete?

--

Go to Headlight System Check

--

9

Repair the short to ground in CKT 592 (LT GRN/BLK). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--

10

Replace the DRL relay in the rear compartment relay center. Refer to Wiring Repairs in Wiring Systems.

Is the relay replacement complete?

--

Go to Headlight System Check

--

Daytime Running Lamps (DRL) Headlamps Always On Norway and Sweden

Step

Action

Value(s)

Yes

No

1

Was the entire Headlight System Check performed?

--

Go to Step 2

Go to Headlight System Check

2

Disconnect the dash integration module (DIM) connector C1.

Do the daytime running lamps (DRL) turn off?

--

Go to Step 5

Go to Step 3

3

Remove the DRL relay from the rear compartment relay center.

Does the DRL turn off?

--

Go to Step 6

Go to Step 4

4

Repair the short to battery positive voltage (B+) in CKT 691 (GRY) between the underhood junction block and the rear compartment relay center. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--

5

Replace the dash integration module (DIM). Refer to Body Control Module Replacement in Body Control System.

Is the DIM replacement complete?

--

Go to Headlight System Check

--

6

Connect a DMM from the DIM connector C1 cavity A4 (LT GRN/BLK) to ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 8

Go to Step 7

7

Replace the DRL relay in the rear compartment relay center. Refer to Wiring Repairs in Wiring Systems

Is the relay replacement complete?

--

Go to Headlight System Check

--

8

Repair the short to ground in CKT 592 (LT GRN/BLK). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--