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Old 02-05-2013, 08:10 AM   #3
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The orange single wire is constant power. It has power even when the key is removed from the car.

The two black wires are the grounds. One is a constant ground allowing you to turn on the dome light whenever you'd like. The other ground is managed by the door ajar system; when a door is opened, it connect the ground which activates the dome light. I don't remember which ground is which but a tester or trial and error will find them.
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