Kripas
Well-Known Member
- First Name
- Kripas
- Joined
- Mar 21, 2019
- Threads
- 12
- Messages
- 381
- Reaction score
- 411
- Location
- San Leandro California
- Vehicle(s)
- Jeep Wrangler JLU
This happened to me and cost me $2200 from the dealership. Never run or cut hole in the firewall on passenger side where all the wire is . The wire got cut some how when I tried to use a hanger to snake my positive wire and threw me a 4WD error and could not use 4WD and they have to remove everything to re wire it. From now on I just run the wire under the Jeep thru the grommet hole under the passenger seatExpensive day at the dealer. This weekend I went to install the AUX switch pannel. I ran the harness across the engine bay, dropped it down into the fender well. Cut a hole though the grommet to feed the harness in and... oops.
First off, the cut didn't pierce both sides of the grommet. Went at it again. Couldn't get the interior portion of the harness in. Eventually did so but managed to bust one of the connectors for the 10 pin plug into the switch panel itself.
I wired everything else up except for the switch, figuring I'd find a replacement pin to crimp on. Hulk would not start. The dash threw lots of errors about not being in park (it was). Put my code reader on, U0101. This means the TCM wasn't communicating. Checked the harness points that I worked on, and didn't see anything unusual. Called roadside assistance and got the Hulk towed in.
They brought everything back to factory spec. noting that pin 13 on the bus connector under the kick plate wasn't staying in the harness, but we worked around that. Same error was coming up. They had to over night it to do more investigations.
They traced it to a short or something in the harness that runs from outside the firewall into the cabin. Took apart the 2' or so run of wiring. Turns out the TCM bus wire wasn't in the bundle/loom of other wires and when I cut a hole through the grommet I nicked the wire. It was grounding out. Repaired ($1100 after tax) and now I need to source a replacement AUX cable harness because mine’s f'd up. At least the Jeep is running again.
EDIT: spelling