GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 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, the park brake switch (air ABS), the park brake switch (hydraulic ABS).

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

--