Important: Verify functional bulbs before beginning diagnostic procedure.

Did you perform the Lighting Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

Are all of the courtesy/dome lamps inoperative?

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Go to Step 6

Go to Step 3

1. Activate courtesy/dome lamps
2. With DMM, check for battery voltage from inoperative lamp CKT 1732 (ORN) to ground

Is battery voltage present?

B+

Go to Step 4

Go to Step 5

Repair open in CKT 156 (WHT) between inoperative lamp assemply and S214.

Is the repair complete?

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Go to Step 10

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Repair open in CKT 1732 (ORN) between inoperative lamp assemply and one of the following splices:

Is the repair complete?

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Go to Step 10

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1. Turn the courtesy lamp switch to the ON position
2. Check for battery voltage at BCM C2 cavity B12.

Is battery voltage present?

B+

Go to Step 7

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

Verify continuity of the following three circuits with DMM:

Are all of the circuits functional?

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Go to Step 8

Go to Step 9

Replace courtesy lamp relay.

Is repair complete?

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Go to Step 10

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Repair the inoperative circuit.

Is the repair complete?

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Go to Step 10

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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