Diagnostic Aids
Inspect the daytime running lamps (DRL) resistor located on the left frame rail for cracks and corrosion. A failure of the resistor due to corrosion brought on by the original fastening procedure to the frame has been common on this vehicle.
Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | |||||||||
1 | Did you perform the Lighting System Diagnostic System Check? | Go to Step 3 | |||||||
2 | Recheck the scan tool for the following:
Have any of the above DTCs set? | Go to Step 3 | |||||||
3 |
Do the daytime running lamps (DRL) illuminate? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 4 | ||||||
4 |
Are the headlamps illuminated? | Go to Step 5 | Go to Step 6 | ||||||
5 | Connect a 15-amp fused jumper wire between the ground circuit of the DRL relay at the DRL resistor connector and the ground circuit at the DRL resistor connector. Are the headlamps illuminated? | Go to Step 8 | Go to Step 9 | ||||||
6 | Test the ground circuit of the DRL relay for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 7 | ||||||
7 | Inspect for poor connections at the DRL relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 10 | ||||||
8 | Inspect for poor connections at the harness connector of the DRL resistor. Refer to Underhood Electrical Center or Junction Block Replacement and Connector Repairs . Did you find and correct the condition? | Go to Step 12 | Go to Step 11 | ||||||
9 | Repair an open or high resistance in the ground circuit of the DRL resistor. Refer to Circuit Testing and Wiring Repairs . Did you complete the repair? | Go to Step 12 | -- | ||||||
10 | Replace the DRL relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 12 | -- | ||||||
11 | Replace the DRL resistor. Did you complete the replacement? | Go to Step 12 | -- | ||||||
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||||
