Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics

Did you perform the Lighting Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Verify the fault is present.

Does the system operate normally?

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Go to Testing for Electrical Intermittents in Wiring Systems

Go to Step 3

1. Turn the headlamp switch to the AUTO position.
2. Cover the ambient light sensor in order to block out all light.

Do the headlights illuminate and the daylight running lamps (DRL) turn off?

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Go to Step 9

Go to Step 4

1. Turn OFF the ignition .
2. Disconnect the BCM.
3. Remove the DRL relay.
4. Using a J 39200 DMM and J 35616 adaptor, test the control circuit of the DRL relay for a short to ground.

Does the resistance measure greater than the specified value?

1M ohms

Go to Step 5

Go to Step 6

Using a J 39200 DMM, measure the resistance from terminal 30 to terminal 87 of the DRL relay.

Does the resistance measure greater than the specified value?

1M ohms

Go to Step 8

Go to Step 7

Repair the short to ground in the DRL relay control circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 9

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Replace the DRL relay. Refer to Daytime Running Lamps (DRL) Relay Replacement .

Did you complete the replacement?

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Go to Step 9

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Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

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Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3