Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose).
The courtesy lamps work through the BCM and its powered through the BCM7 and SDM IGN #54 fuses under the left side of the hood.
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Would you like a wire diagram to double check my answer?
Use this link.
All courtesy lamps get there power from the BCM. The BCM uses the power from the fuses I listed to power these lights.
If the instrument cluster shows a door ajar with a door open and the vehicle on then its going to be the BCM that has failed.
A BCM can not be fixed, it is a computer module. To replace it you need a dealer level diagnostic tool to program the replacement module.
Hello again Chris here,
I am contacting you because the post has not been closed out. We have 7 days to get a confirmation that my help assisted you, or the post times out. When a post times out, that means its no longer on my active list (you reply I never know it.) You have already paid the fees to get this question answered, but it appears you're not pleased, or need more help.
Let me help some more. Is there anything else you feel I could offer so you would be pleased with my help. I have the option to call you if that would be better.