Quote:
Originally Posted by dglcinc
Excellent photos! Did you do the install? Was the left grommet slot blank before the install?
Talk about meticulous if you have these photos from four years ago. This is great info, what this shows me is that your trailer harness goes through the left grommet hole, not the right one (where the PDC/CA harness goes through.) My problem is the left hole is already occupied with a pretty sizable harness that feeds through and then makes an immediate turn behind the heat shielding, never to be seen again. No clue what it is for. So you're kinda confirming that if you have PDC you can't use the right grommet hole unless you figure out some way to feed a PDC harness through the trailer grommet. That's getting into some surgery I'd like to avoid. I also thought of just drilling another grommet hole, but the space in that area is pretty restricted, it would be pretty kludgey.
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Yes, I did the install. Took me a day-and-a-half to sort out and decide which way the wiring should go. I just sat on the ground, staring at the wires (having a beer or two) and rationalizing which way things should be connected, all the while reminding myself that BMW would not design something like this if it required cutting and splicing ... so:
Trailer harness goes through the left hole. Whatever is there now, should be traced, disconnected and pulled inside the wheel well. I believe that one side had CA and one side had PDC. I combined the two to come out of the right hole.
The new trailer harness with blue/black connector needs to be taken apart so that it will fit through the left hole going into the wheel well where it needs to connect to the AHM module.
Cap and tie the CA connector that is part of the trailer harness. You won't be using it.
You will use the CA and the PDC coming out of the right hole that was originally already connected to your car.
Follow the instructions as per attached PDF.
I discussed this with Daryl from Invishitch. He wrote the installation PDF.