GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC C-Series Medium Duty Truck B7 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Headlamps, Daytime Running Lamps (DRL) On With Park Brake Applied

Step

Action

Value(s)

Yes

No

1
  1. Set the parking brake.
  2. Observe the park brake indicator lamp.

Did the park brake indicator lamp light?

--

Go to Step 2

Go to Step 4

2
  1. Remove the daytime running lamp (DRL) control module from the harness connector.
  2. Place the ignition switch in the RUN position.
  3. Connect a test lamp between terminals A and C in the DRL control module harness connector.

Did the test lamp light?

--

Go to Step 3

Go to Step 5

3

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

Is the repair complete?

--

System OK

--

4

Locate and repair the open in CKT 1134 (LT BLU) between S227 and the DRL control module/park brake switch.

Is the repair complete?

--

System OK

--

5

Locate and repair the open in CKT 1134 (LT BLU) between S227 and the DRL control module.

Is the repair complete?

--

System OK

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