E70 trailer hitch wiring issue
Hello all,
I have a 2012 E70 and am installing the factory hitch with factory wiring harness 71 60 2 156 525. As farf as I can tell, this is the only harness available for the E70, but it is not the correct harness for N55 E70s that have both PDC and Comfort Access. The problem is with the routing through the body into the car. In early models, the two grommets in the right rear well behind the fuses was were used for 1) Park Distance Control and 2) the Comfort Access antenna. So BMW combined the trailer hitch harness with the comfort access antenna harness so those two items could be routed through the same hole. Starting with the turbo models in 2011, there is an extra element. What looks like a harness or air pressure line for the rear exhaust gate, or perhaps a line for the air suspension, was routed through one of the two grommets and a new combined PDC/Comfort Access harness was routed through the remaining grommet. So now I have 2 harnesses, each with their own grommet, and one hole in the back of the car to fish them through. I looked but can't find a triple combined harness (i.e. hitch, PDC and comfort access), so I'm thinking it does not exist. I suppose I could unwrap both harnesses, combine the hitch wiring into the other harness (discarding the Comfort access wiring in the hitch harness) and re-wrap it all, but that's going to be a major pita. I searched around and saw that others have also encountered this problem, but nobody posted a solution.
Does anyone have any suggestions?
Thanks!
Current BMWs: 14 total. '12 X5, '09 E93 335i, '09 E91 328i, '08 E93 328i, '08 E61 535ix '02 E39 M5, '01 E39 M5, '02 E39 touring, '91 E34 M5, (2)'88 E28 M5s, '75 2002, 74 2002,
Prior BMWs: Every E-body 5 series including tourings and every E-body 3 series. '74 2002 tii
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