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Makes 🢒 Pontiac 🢒 2007 🢒 G3 🢒 Body Systems 🢒 Lighting 🢒 Daytime Running Lamps (DRL) Inoperative

Daytime Running Lamps (DRL) Inoperative Hatchback

Diagnostic Aids

The daytime running lamp (DRL) system will not work if the parking brake is applied. The system is designed to work only when the engine is running and the parking brake is released. If the parking brake circuit is shorted to ground or the switch stays closed when the engine is running, the DRL system will not work.

Step

Action

Values

Yes

No

1

Turn ON the headlamps with the headlamp switch.

Do the headlamps work?

--

Go to Step 3

Go to Step 2

2

Repair the regular headlamp system before completing this diagnostic table.

Does the daytime running lamp (DRL) system work after the headlamps have been repaired?

--

System OK

Go to Step 3

3

Test fuse EF19.

Is fuse EF19 open?

--

Go to Step 4

Go to Step 5

4
  1. Test for a short circuit and repair if necessary.
  2. Replace fuse EF19.

Is the repair complete?

--

System OK

--

5
  1. Turn ON the ignition, with the engine OFF.
  2. Measure the voltage at fuse EF19.

Does the voltage equal the specified value?

11-14 V

Go to Step 7

Go to Step 6

6

Repair the power supply circuit for fuse EF19.

Is the repair complete?

--

System OK

--

7
  1. Disconnect the electrical connector from the DRL module.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure fuse EF19 voltage feed to the DRL module terminal.

Is the voltage equal to the specified value?

11-14 V

Go to Step 9

Go to Step 8

8

Repair the open circuit between fuse EF19 and the terminal of the DRL module connector.

Is the repair complete?

--

System OK

--

9

With the DRL module still disconnected, use an ohmmeter to measure the resistance between ground and terminal E of the DRL module connector.

Does the ohmmeter indicate continuity?

--

Go to Step 11

Go to Step 10

10

Repair the circuit between ground and the terminal of the DRL module connector.

Is the repair complete?

--

System OK

--

11
  1. Parking brake released.
  2. Turn on the ignition, with the engine OFF.
  3. Observe the parking brake indicator lamp.

Is the parking brake indicator lamp ON?

--

Go to Step 12

Go to Step 15

12

Disconnect the electrical connector to the parking brake lever switch.

Is the parking brake indicator lamp still ON?

--

Go to Step 13

Go to Step 14

13

Repair the short to ground in the parking brake circuit.

Is the repair complete?

--

System OK

--

14

Replace the parking brake lever switch.

Is the repair complete?

--

System OK

--

15
  1. Make sure the headlamps are turned OFF.
  2. Turn ON the ignition, with the DRL module disconnected.
  3. Measure fuse F4 voltage at the DRL module connector terminal.

Is the voltage equal to the specified value?

11-14 V

Go to Step 17

Go to Step 16

16

Repair the open between fuse F4 and the terminal of the DRL module connector.

Is the repair complete?

--

System OK

--

17

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

Is the repair complete?

--

System OK

--

Daytime Running Lamps (DRL) Inoperative Notchback

Diagnostic Aids

The daytime running lamp (DRL) system will not work if the parking brake is applied. The system is designed to work only when the engine is running and the parking brake is released. If the parking brake circuit is shorted to ground or the switch stays closed when the engine is running, the DRL system will not work.

Step

Action

Values

Yes

No

1

Turn the headlamps ON with the headlamp switch.

Do the headlamps work?

--

Go to Step 3

Go to Step 2

2

Repair the regular headlamp system before completing this diagnostic table.

Does the DRL system work after the headlamps have been repaired?

--

System OK

Go to Step 3

3

Check fuse Ef23 and F21.

Is fuse Ef23 and F21 blown?

--

Go to Step 4

Go to Step 5

4
  1. Check for a short circuit and repair if necessary.
  2. Replace fuses Ef23 and F21.

Is the repair complete?

--

System OK

--

5
  1. Turn the ignition ON.
  2. Check the voltage at fuse Ef23 and F21.

Does the voltage equal the specified value?

11-14V

Go to Step 7

Go to Step 6

6

Repair the power supply circuit for fuse Ef23 and F21.

Is the repair complete?

--

System OK

--

7
  1. Disconnect the electrical connector from the DRL module .
  2. Turn the ignition ON.
  3. Check the voltage at terminal 13 of the C203 connector.

Is the voltage equal to the specified value?

11-14V

Go to Step 9

Go to Step 8

8

Repair the open circuit fuse Ef23, F21 and terminal 13 of the C203 connector.

Is the repair complete?

--

System OK

--

9
  1. Release the parking brake.
  2. Turn the ignition switch ON.
  3. Observe the parking brake indicator lamp.

Is the parking brake indictor lamp on?

--

Go to Step 10

Go to Step 13

10

Disconnect the electrical connector to the parking brake lever switch.

Is the parking brake indicator lamp still on?

--

Go to Step 11

Go to Step 12

11

Repair the short to ground in the parking brake circuit.

Is the repair complete?

--

System OK

--

12

Replace the parking brake lever switch.

Is the repair complete?

--

System OK

--

13
  1. Make sure the headlamps are turned OFF.
  2. Turn the ignition ON.
  3. Check the voltage at terminal 73 of the C201 connector.

Is the voltage equal to the specified value?

0V

Go to Step 15

Go to Step 14

14

Repair the open between fuse F3 and terminal 73 of the C201 connector.

Is the repair complete?

--

System OK

--

15

Replace the controller module SJB.

Is the repair complete?

--

System OK

--