Did you review the Audible Warnings Description and perform the necessary inspections?

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Go to Step 2

Go to Diagnostic Starting Point

1. Insert the key in the ignition.
2. Turn the ignition switch to the OFF position.
3. Using a scan tool, enter BCM Data List INPUT 2.
4. Monitor the park lamps.
5. Move the headlamp switch to the PARK position.

Is ON displayed?

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Go to Step 3

Go to Step 6

Inspect the connections at the BCM. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Are the connections in need of repair?

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Go to Step 4

Go to Step 5

Repair the connections at the BCM as necessary. Refer to Connector Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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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 8

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Using a DMM, backprobe and measure the voltage at BCM connector C2 terminal B6 to ground.

Is the voltage near the specified value?

B+

Go to Step 3

Go to Step 7

Locate and repair the open or high resistance in CKT 9. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 8

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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 2