GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Daytime Running Lamps (DRL) Headlamps Inoperative

Daytime Running Lamps (DRL) Headlamps Inoperative 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
  1. Turn the headlamp switch to the OFF position.
  2. Turn the twilight delay switch to an ON position.
  3. Expose the ambient light sensor to a bright incandescent light.
  4. Turn the ignition switch to the ON position.
  5. Remove the gear selector from the PARK position.
  6. Backprobe the underhood junction block with a DMM from battery positive voltage (B+) to connector C2 cavity B10 (LT GRN/BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 7

3

Backprobe the underhood junction block connector C1 with a DMM from cavity A9 (PNK) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 5

4

Backprobe the LH high beam headlamp with a DMM from cavity B (PNK) to ground.

Is the voltage within the specified range?

10-15 V

Go to Headlight System Check

Go to Step 10

5

Replace the DRL Relay. Refer to Wiring Repairs in Wiring Systems.

Are the DRL now operating properly?

--

Go to Headlight System Check

Go to Step 6

6

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

--

7
  1. Disconnect the dash integration module (DIM) connector C1.
  2. Remove the DRL relay from the underhood junction block.
  3. Backprobe the underhood junction block connector C2 with a DMM from cavity B10 (LT GRN/BLK) to the DIM connector C1 cavity A4 (LT GRN/BLK).

Is the resistance less than the specified value?

5 ohms

Go to Step 8

Go to Step 9

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 open in CKT 592 (LT GRN/BLK) between the underhood junction block and the DIM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--

10

Repair the open 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

--

Daytime Running Lamps (DRL) Headlamps Inoperative 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

Backprobe the rear compartment relay center connector with a DMM from cavity D9 (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 8

3

Backprobe the rear compartment relay center connector with a DMM from cavity C9 (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 8

4
  1. Turn the headlamp switch to the OFF position.
  2. Turn the twilight delay switch to an ON position.
  3. Expose the ambient light sensor to a bright incandescent light.
  4. Turn the ignition switch to the ON position.
  5. Remove the gear selector from the PARK position.
  6. Backprobe the rear compartment relay center connector with a DMM from cavity D9 (ORN) to  D7 (LT GRN/BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 5

Go to Step 10

5

Backprobe the rear compartment relay center connector with a DMM from cavity C7 (GRY) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 6

Go to Step 7

6

Do both low beam headlamps operate normally during regular low beam operation?

--

Go to Step 9

Go to Headlight System Check

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 open in CKT 3140 (ORN) between S401 and the rear compartment relay center. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--

9

Repair the open in CKT 691 (GRY) between the rear compartment relay center and the underhood junction block. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--

10
  1. Disconnect the rear compartment relay center connector.
  2. Disconnect the dash integration module (DIM) connector C1.
  3. Connect a DMM from the rear compartment relay center connector cavity D7 (LT GRN/BLK) to the DIM connector C1 cavity A4 (LT GRN/BLK).

Is the resistance less than the specified value?

5 ohms

Go to Step 11

Go to Step 12

11

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

--

12

Repair the open in CKT 592 (LT GRN/BLK) between the rear compartment relay center and the DIM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Headlight System Check

--