DEFINITION: The courtesy lamps stay on with all the doors closed, I/P lamp dimmer switch off, and none of the interior lighting modes activated. However, the inadvertent load (battery rundown) protection is unable to turn off the courtesy lamps after 20 minutes, or 3 minutes if the vehicle has less than 15 total accumulated miles.

Was the BCM diagnostic system check performed?

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Go to Step 2

Go to Diagnostic System Check - Body Control System in Body Control System

1. Disconnect the Body Control Module (BCM) connectors C2 and C3.
2. Using a DMM, measure the voltage between the BCM harness connector C3 terminal F and ground.

Is the voltage within the specified range?

Less than 2V

Go to Step 3

Go to Step 6

Using a DMM, measure the resistance between the BCM harness connector C2 terminal B1 and ground.

Is the resistance within the specified range?

∞

Go to Step 4

Go to Step 7

Using a DMM, measure the resistance between the BCM harness connector C2 terminal A1 and ground.

Is the resistance within the specified range?

∞

Go to Step 5

Go to Step 8

1. Reconnect the BCM connector C2 and C3.
2. Turn the ignition switch from off to on, then back to off.
3. Turn the I/P lamp dimmer switch to the DOME position for 20 minutes.

Did the courtesy lamps turn off after 20 minutes, or 3 minutes, if the vehicle has less than 15 total accumulated miles?

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System OK

Go to Step 9

Repair short to voltage in circuit 1732.

Is the repair complete?

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Go to Step 3

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Repair short to ground in circuit 156.

Is the repair complete?

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Go to Step 4

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Repair short to ground in circuit 157.

Is the repair complete?

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Go to Diagnostic System Check - Body Control System in Body Control System

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1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
2. Perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Is the repair complete?

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Go to Diagnostic System Check - Body Control System in Body Control System

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