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Trailer hitch wiring
I am thinking of building a custom hitch for our Z4. I'm a certified welder and done lots of fabbing so I'm not worried about the mechanics of the hitch, I more concerned about not screwing up the Z's electrical system with the extra load of the trailer lights. What sort of electrical isolation module did you use? I suspect one would want a unit that takes power from the battery. Could you provide a make and model number of the one you used? Have you had any issues or concerns with the electrical connections? Thanks!
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