Thank you for posting this. I have a flat tow Mopar harness for my JLUR with LED tail lights (only) and also have a battery charge circuit (RVi brand) off the tow vehicle power. Am I going to be ok for the long nights?
Hmmm, I like the notion of disconnecting the circuit. If one were to utilize relays then could't there be be a "back box" that sits in between the rear lights and the wiring harness. This relay set could be normally on, so if not powered the Jeep has OEM config, and if +12V is supplied from the coach +12V line the relay set switch to control the lights from the motorhome. This special LED signal wire could then be interrupted too.
.If all works as it should, the charging current you are supplying should offset the drain the Jeep incurs in its "awake" state. That said, your current solution is the classic case of addressing the symptom but not solving the underlying problem. I *think* you will be OK as is, but if you wanted an extra degree of safety and less burden/dependency on the charging circuit, you can install our fix kit.
Cool beans, of course! I've looked for the install doc but cannot find. Can you give a pointer to it please?
Got it. Thanks much.
Just registered to thank you for solving this problem for me. Took me only 15 minutes.Confirmed. It's the communication back to the BCM through the fault-sense wire.
I removed both taillights and applied brakes on the RV. Jeep did not wake up.
Removed the fault-sense pin from the harness, reattached the lights and applied the brakes. Jeep did not wake up. Taillights and turn signals worked when actuated.
Re-installed the fault-sense pin, put the brakes on the in the RV, Jeep woke up.
Interestingly enough, when the brake pedal is pushed through the window with a broom handle, the pedal doesn't trigger the brake lights. It seems like the Jeep is smart enough to ignore the pedal press when it's asleep but not smart enough to ignore the fault.
I'm assuming this is because the circuit board in the LED taillight is alive from the 12v supplied by the RV and it initiates the signal.
I don't know what the legality or other impacts might be for doing this. This was just for diagnostic purposes.
On the LED taillight assembly:
remove the white cover
push the pin show forward out of the connector for the gray wire
rotate the pin 180 degrees
pull it back down into the connector to where it sits far below the other pins.
CoolTech, thank you and to all the other participants that helped with the solution. I have a Wrangler on order with LED lights so I am so glad I found this thread. It no doubt has saved me a lot of head scratching. I anticipate ordering the CooTech wiring harness based on this thread once I receive the Jeep.
Anything is possible if you throw enough time or money at it but the wire harness you're tapping into runs along the inside of the right side rocker panel. Not worth the trouble in my opinion.
