The 7-pin harness they provide has an additional 2 fuses built-in. They were clear that there is no 4-pin harness available at this moment because of the issues they are experiencing with the 2020 - 22 model years. I called Hyundai customer support and they provided a part number. ![]() My local dealer gave the same BS that there isn't a harness and that I should have UHaul install something. Since all 2023 Palisades come pre-wired for a trailer harness, I felt an OEM wiring harness is the safest and best route. With a full LED lighting system, splicing in a wiring harness will throw codes because the resistance changes when adding in new wires. As many on this forum have discovered, there are mixed messages and a ton of frustration. Hope it helps.I purchased a 2023 Hyundai Palisade Caligraphy and I wanted to put a trailer hitch on it. ![]() Pink/Red is fuel sender and there is a orange and black wire that go to the dome light for the hard top on mine. Not needed but also in that loom is a White wire with Red tracer for the back up lights. I just ran a ground from the frame to the connector. These two will also make your brake lights work. Mine is a 86 but the Green wire is the right turn and the Green wire with a Black tracer was the left tail light. I drilled and put a grommet next to where the factory loom goes through and taped in my wires right there inside on the cab. On the back of the tub, Inside back where the hard top light plugs into the loom you will find the wires before they become a lot of wires. I finely got fed up (to put it nicely) and decided to hook it up before all the wires that are down there. I got the drivers side to work and hooked up the pass side and the drivers side would not work right anymore. I had pulled a tail light off and there is a lot of wires in there. This will keep the vehicle's harness free from corrosion-causing hacking/piercing and it is also removable if you don't want the trailer's harness on the vehicle all of the time. verify proper operation of the vehicle's lights, and also of the trailer's. Then all you need to do is disconnect each tail light, plug in your vehicle's harness to your new harness, then plug your harness into the tail lights. Solder and heat shrink all of the splices. In the middle I spliced in the trailer 4-pin. I made the length between the 2 jumpers long enough to go across to each side of the Jeep. spliced into 4 wires of the jumper for the left side, and then into the turn signal wire of the right side. Made 2 jumpers using the 4-conductor, one for each side. I used the 2 connectors, some 4-wire trailer harness wire, and a 4-pin trailer harness. Black is tail, red is stop/turn, white is ground, and the green is reverse. The taillights on mine have Red, Black, green (may be brown - I am rd/gr colorblind ), and white. ![]() Even better is to add some dielectric grease in the cinnectors to help seal even better. Do not jam the test light into the connector either, it spreads the connector contacts for a loose connection, just lightly touch the test light probe to the metal inside the connector. I went to NAPA, got 2 complete 4-pin connectors that plugged into the harnes, and made a harness that fit in between the harness and the taillight. Piercing the insulation leaves the wire open to corrosion. Please, just unplug the 4-way to the taillight and operate the different lights while CAREFULLY probing the harness side of the connector.
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