Power for the dome light comes from the A pillar along roof then to light. Tipping it would be pretty tricky to try and route a wire from this down the D pillar and that would be with pulling back headlining and dicking around with it. Might work but think would be much easier to run a new one along chassis or body in the floor IMO.

There will be power to the courtesy switch on the rear doors, that would closest i think unless there is one to do with trailer wiring.

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