Installed today the S8F67-AC700 4pin/7pin Trailer harness 2023
Palisade. Took 1.5 hrs total.
Honestly, pulling the rear jack compartment out, the sill plate, and popping open the two left trim panels was fairly straight forward. The trick was sorting the best way to run the harness through the OEM rubber grommet. I modified it slightly more than the directions.
First, the white 8 pin harness plug above the rubber gromet just inside the trim panel, was there under a piece of white padding. The white connector was taped with athletic type tape to the harness that runs to the rubber plug. I felt around inside and the white plug's harness had no slack. I was afraid to un-tape it and have it shrink back inside the panel and cause stress once the new harness was plugged into it. So, I left it taped and plugged the new harness into it as it was.
The rubber plug lifts out of the body metal hole quite easily. The rubber is very, very soft. I opted to drill the gromet with a 1/2 hole and then use tin snips to cut the gromet from the edge to the hole. This allowed for a better fit of the harness vs it spreading the cut too wide. There is only 3\4 inch room to drill the hole between the harness already running through it and the lip of the gromet that the body metal fits into. You'll see I drilled the hole fairly close to the harness already going through the grommet. There is no way the new harness can somehow rub against the metal body panel.
I then installed the 7pin plug harness through the gromet. To maximize the amount of harness going to the hitch, the new harness is inserted through the gromet so just 1 inch of the convoluted plastic tube is protruding into the trunk area. I connected everything inside the trunk first and then pulled it tight to make sure I maximized that length going to the bumper. That allowed me to RTV seal the gromet to the plastic tubing vs the cloth covering.
Lastly, I did not photograph the RTV application to both sides. I'm sure you can sort that out. Though, work the gromet and squeeze it some to minimize the gap in the cut before sealing with RTV.
When the Redarc brake controller arrives this week, I'll take some photos of the install as well.
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Fist ten photos. .............................