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5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I put an after market trailer hitch on my X5 and am very happy with it. But now I am challeged with trying to connect the trailer wiring. I have a 5 wire system that has a converter. It looks as though there is a 5 wire plug-in in the center of the trunk for plugging the factory wiring system into. Does anyone have a schematic or something that shows the color coding for the wiring?
your BMW has a lamp control module which controls the output to the exterior lights. The BMW factory trailer hitch kit comes with an interface module which takes the sigmals from the lamp module and will output them to the trailer hitch wiring. without that interface module I dont know if you will be able to get it working. Im not sure if the module is sold separately but you could check with your local BMW parts dept.
regards,
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