Troubleshooting Non-Working Light Functions With Diode Wiring On A 2024 Jeep Wrangler 4xe

Updated 07/13/2024 | Published 07/11/2024

Question:

Turn and and brake lighs work only side light on rear light working but not tail lighs tow truck good cable good plug wired corecctly 2024 wrangler 4xe Roadmaster Smart Diode 7-Wire to 6-Wire Wiring Kit for Variable Voltage LED Tail Lights

asked by: Gerry S

Expert Reply:

Hey Gerry,

Does your 2024 Jeep Wrangler 4xe have ParkSense Proximity Sensors?

expert reply by: Kevin C

Gerry

7/12/2024

Yes

Kevin C.

7/13/2024

@Gerry Ok, so we know you have the correct diode kit with the # RM63MR. I'm a bit confused by your initial question though. You say the turn and brake signal is coming through on a side light but not the tail lights? Or are they working on the tail lights but just the running light signal isn't coming through? If just the running light signal isn't coming through then you'll want to recheck the wiring to make sure the correct wire functions are going to and coming from the diodes. If everything is correct start testing for power at the trailer connector on the motorhome to make sure there isn't an issue on with the wiring on the motorhome. If you're getting power at the back of the motorhome connect the cable and check the towed vehicle end. I doubt the cable is the issue because it's new but it's best to rule it out. From there you can test for the signal at the diodes. If you don't get the signal at the diode then there's a break in the wiring somewhere between the diode and where you last checked for power. More than likely the outgoing wire to the running light circuit is either spliced to the wrong wire or just has a loose connection.