GM Service Manual Online
For 1990-2009 cars only

Headlamps, Daytime Running Lamps (DRL) On With Park Brake Applied Domestic

Step

Action

Value(s)

Yes

No

1

Was the DRL System Check performed?

--

Go to Step 2

Go to Daytime Running Lights (DRL) System Check

2

  1. Engage the parking brake.
  2. Disconnect the connector at the park brake warning switch.
  3. Connect a J 39200 DMM between the park brake warning switch connector, pin A, and ground.

Is continuity present?

--

Go to Step 4

Go to Step 3

3

Replace the park brake warning switch.

Do the daytime running lamps (DRL) light with the park brake applied?

--

Go to Daytime Running Lights (DRL) System Check

Go to Step 4

4

  1. Disconnect the connector at the DRL control module.
  2. Connect a J 39200 DMM between the DRL control module connector, cavity A, and the park brake warning switch connector, cavity A, in CKT 1134 (LT BLU).

Is continuity present?

--

Go to Step 5

Go to Step 6

5

Replace the DRL control module.

Do the daytime running lamps (DRL) light with the park brake applied?

--

Go to Daytime Running Lights (DRL) System Check

Go to Step 6

6

Repair the open in CKT 1134 (LT BLU) between the DRL control module and the park brake warning switch.

Do the daytime running lamps (DRL) light with the park brake applied?

--

Go to Daytime Running Lights (DRL) System Check

--

Headlamps, Daytime Running Lamps (DRL) On With Park Brake Applied Export

Step

Action

Value(s)

Yes

No

1

Was the DRL System Check performed?

--

Go to Step 2

Go to Daytime Running Lights (DRL) System Check

2

  1. Disconnect the connector at the daytime running lamp control module.
  2. Disconnect the connector at the park brake warning switch.
  3. Connect a J 39200 DMM between the daytime running lamp control module connector cavity A and the park brake warning switch connector cavity  A for CKT 1134 (LT BLU).

Is continuity present?

--

Go to Step 3

Go to Step 4

3

  1. Apply the park brake.
  2. Connect a J 39200 DMM between the park brake warning switch pins in order to verify continuity.

Is continuity present?

--

Go to Step 5

Go to Step 6

4

Replace the daytime running lamp control module.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

5

Repair the open in A for CKT 1134 (LT BLU) between the daytime running lamp control module and the park brake warning switch.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

6

Replace the park brake warning switch.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--