Replaced bulb but that didn't fix anything. What could it be? Bad relay maybe?
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2002 Jaguar XJ8 Question: Right rear brake light and back up sensors went out at same time.
scan body control module for codes and post so we can adv
The exterior lighting control is a direct output of the BPM (Body Processor Module). The parking distance system has its own control module. There is a ground connection for the parking module in the right rear of the trunk that may be shared with the lighting system. That would be a good place to start.
The next step would be to take it to a qualified service center with the Jaguar Landrover diagnostic system for further diagnostics.
We are familiar with these vehicles and would be happy to help if needed.
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