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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 Seville 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Daytime Running Lamps (DRL) Inoperative

Daytime Running Lamps (DRL) Inoperative Domestic

Step

Action

Yes

No

Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

1

Was the Lighting System Diagnostic System Check performed?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Important:: Gear selector must be out of the PARK position in order to operate the daytime running lamps (DRL).

  1. Turn ON the ignition, with the engine OFF.
  2. Depress and hold the brake pedal.
  3. Move the gear selector out of the PARK position.
  4. Verify the parking brake is disengaged.
  5. Expose the ambient light sensor to a bright incandescent lamp.
  6. Wait more than 20 seconds.
  7. Place the gear selector in the PARK position.
  8. Release the brake pedal.

Did the DRL operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Do the high beam headlamps operate properly?

Go to Step 4

Go to Headlamps Inoperative - High Beams

4
  1. Turn ON the ignition, with the engine OFF.
  2. With a scan tool, command the DRL relay ON and OFF.

Do you hear a click when you command the DRL relay ON and OFF?

Go to Step 8

Go to Step 5

5
  1. Turn OFF the ignition.
  2. Disconnect the DRL relay.
  3. Connect a test lamp between the supply voltage circuit of the DRL relay coil and a good ground.
  4. Turn ON the ignition with the engine OFF.

Does the test lamp illuminate?

Go to Step 6

Go to Step 12

6
  1. Connect a test lamp between the supply voltage circuit of the DRL relay coil and the control circuit of the DRL relay.
  2. Command the DRL relay ON.

Does the test lamp illuminate?

Go to Step 10

Go to Step 7

7

Test for an open circuit in the control circuit of the DRL relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 11

8

Test for an open or high resistance in the battery positive voltage circuit of the DRL relay switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 9

9

Test for a short to ground in the DRL headlamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 10

10

Inspect for poor connections at the DRL relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 13

11

Inspect for poor connections at the Dash Integration Module (DIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 14

12

Repair an open or high resistance in the supply voltage circuit of the DRL relay coil. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 15

--

13

Replace the DRL relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 15

--

14

Important:: Perform the setup procedure for the Dash Integration Module (DIM). Refer to Body Control Module (BCM) Programming/RPO Configuration .

Replace the DIM. Refer to Dash Integration Module Replacement in Body Control System.

Is the replacement complete?

Go to Step 15

--

15

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Daytime Running Lamps (DRL) Inoperative Export

Step

Action

Yes

No

Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

1

Was the Lighting System Diagnostic System Check performed?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

Important:: Gear selector must be out of the PARK position in order to operate the daytime running lamps (DRL).

  1. Verify the parking brake is disengaged.
  2. Expose the ambient light sensor to a bright incandescent lamp.
  3. Turn ON the ignition, with the engine OFF.
  4. Depress and hold the brake pedal.
  5. Move the gear selector out of the PARK position.
  6. Verify that the DRL illuminate.
  7. Place the gear selector in the PARK position.
  8. Release the brake pedal.

Did the DRL operate properly?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Do the low beam headlamps operate properly?

Go to Step 4

Go to Headlamps Inoperative - Low Beams

4
  1. Turn ON the ignition, with the engine OFF.
  2. With a scan tool, command the DRL relay ON and OFF.

Do you hear a click when you command the DRL relay ON and OFF?

Go to Step 7

Go to Step 5

5
  1. Turn OFF the ignition.
  2. Disconnect the DRL relay.
  3. Connect a test lamp between the battery positive voltage circuit of the DRL relay coil and a good ground.
  4. Turn ON the ignition with the engine OFF.

Does the test lamp illuminate?

Go to Step 6

Go to Step 11

6
  1. Connect a test lamp between the battery positive voltage circuit of the DRL relay coil and the control circuit of the DRL relay.
  2. Command the DRL relay ON.

Does the test lamp illuminate?

Go to Step 12

Go to Step 9

7
  1. Turn OFF the ignition.
  2. Disconnect the DRL relay.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp between the battery positive voltage circuit of the DRL relay switch and a good ground.

Does the test lamp illuminate?

Go to Step 8

Go to Step 10

8

Connect a 15 amp fused jumper between the battery positive voltage circuit of the DRL relay switch and the DRL headlamp supply voltage circuit.

Do the DRL headlamps illuminate?

Go to Step 12

Go to Step 14

9

Test for an open or high resistance in the control circuit of the DRL relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 13

10

Test for an open or short to ground in the battery positive voltage circuit of the DRL relay switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 14

11

Test for an open or high resistance in the battery positive voltage circuit of the DRL relay coil. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 14

12

Inspect for poor connections at the DRL relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 15

13

Inspect for poor connections at the Dash Integration Module (DIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

Go to Step 16

14

Repair an open or short to ground in the DRL headlamp supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 17

--

15

Replace the DRL relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 17

--

16

Important:: Perform the setup procedure for the Dash Integration Module (DIM). Refer to Body Control Module (BCM) Programming/RPO Configuration .

Replace the DIM. Refer to Dash Integration Module Replacement in Body Control System.

Is the replacement complete?

Go to Step 17

--

17

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2