Problem installing OEM hitch and harness

[smassey321]

Originally Posted by dglcinc

The problem is, there are TWO circuits on the one grommet that I have to take out and replace with the trailer harness. The two circuits are the comfort access antenna (two wires, one connector) and the PDC harness (six wires, one connector). When you pull that two-circuit harness into the wheel well and replace it with the trailer harness, the trailer harness has a retrofit connector only for the comfort antenna (two wires), not for the PDC (six wires). I suppose I could drill a third hole in the wheel well so I have a dedicated grommet hole for the hitch, but that seems really lame and un-necessary.

I was looking back there today and noticed a grommet with blue wires laying in the rear wheel well. I can only assume it was removed and replaced with the trailer hitch wiring grommet when the dealer did it back in 2009. I have PDC and CA.