Troubleshooting 2012 Jeep Liberty Factory 7-Way Wiring Connector

Updated 09/04/2024 | Published 12/12/2018

Question:

Hi, I got my 7 pin harness connector tested and it indicated only 2 lights were on with tester. As a result, the jet ski trailer 4 pin has the brake lights constantly on. The 7 pin adapter tester indicates only the brake light is reaching the 7 pin harness, prior to trailer. What part is causing this problem, and how can i repair/replace? Is it a fuse, a module, controller, etc? Where on the vehicle would the part be located? Thank you

asked by: Vincent O

Expert Reply:

For your 2012 Jeep Liberty with factory 7-way, I recommend checking your fuses. The mini fuses M2, M4, and M14 fuses are all possible issues according to your owner's manual so I recommend starting there. If that doesn't solve the issue, then I recommend using a circuit tester like # PTW2993 to test wires and trace them to determine if there is a short.

It definitely sounds like the issue is on the vehicle side, so using a circuit tester to find the issue is needed if the fuses aren't an easy solution.

expert reply by: Jason S

George

9/3/2024

I have the same issue going on the brake light stays on the whole time and out of nowhere. Nothing turns on no signal light no nothing as I connected Jessica trailer to another vehicle. Everything works, but not on the jeep. I’ve already changed the fuel fuel this on the on the box everything and nothing is working

Jon G.

9/4/2024

@George If you've followed the steps Jason mentioned above and you've changed fuses and such out then your next step is to get a second set of eyes on your Jeep. Either have a friend look at it or have a shop look at so they can see if there is anything out of place as well.