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brake wires
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  1. X5 E53 (1999 - 2006)
    I have a 2004 BMW X5 4.4i, I have already installed a trailer hitch and now I am working on installing the trailer wiring harness. I need to find out what wires control what lights. On the factory wiring harness that plugs in to the tail lights there are 4 wire's. Please help Identify what these...
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