Daytime Running Lamps (DRL) Always On
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Daytime Running Lamps (DRL) Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Testing for Electrical Intermittents | Go to Step 3 |
| 3 | Remove the DRL fuse in the underhood fuse block. Do the DRL turn OFF? |
Go to Step 4 | Go to Step 7 |
| 4 |
|
Go to Step 5 | Go to Step 6 |
| 5 | Inspect for poor connections at the harness connector of the underhood fuse block. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 10 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 10 | Go to Step 9 |
| 7 | Repair the DRL supply voltage circuit. Refer to Wiring Repairs
. Did you complete the repair? |
Go to Step 10 | - |
| 8 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement
. Did you complete the replacement? |
Go to Step 10 | - |
| 9 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 10 | - |
| 10 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |