Mopar Trailer Light Wiring Harness Install for Jeep Wrangler JL 

Great video. I will now go and pay someone to do it for me.

For what it’s worth, the Mopar harness being sold now is all woven together into one piece, and is actually run outside the Jeep along the frame rail on the passenger side. This was a fact I didn’t pick up on until I’d taken apart all the interior trim. It was a huge moment of frustration as one might expect. Your video was to be my saving grace since the Mopar instructions leave much to be desired.

for anyone else wondering in CA, i just got off the phone with the jeep dealer in roseville ca. it costs $795 installed. i just scheduled it after watching this.

Thanks Rob, Lots of details that I didn't understand from the manual supplied in the kit. Still took me most of the day to get it all together. Really great video, you didn't leave out any of the key parts of the install.

Rob, you have the patience of Job. Nice work, a real professional.

Very well made installation video.Hats off to the installer.Well done!

Great detailed video! Heads up to anyone doing this the red wire you run from the fuse box to the back can ark even if battery is disconnected, I’d put the eyelet on stud last and if it arks and lights don’t work check the fuse that runs off that eyelet it’s in that wrapped connector that you zip tie next to engine if it blows gets a new 30amp fuse.

Man I was super stressing out for this installation but thank you very much for this video. You just helped me save $800 🙏🏼

Excellent video! 100% on spot. Got mine hooked up and connected in no time. Thanks 😊

By far the best install video I have found for this. Great work, you have saved me a lot of time!

Thank you Rob!!

Very well done video. Good demonstration and excellent production quality.

EXCELLENT Tutorial, very clear! KEEP IT UP!!!

Wow great job

I have a 2021 JL 4 door. Getting the wire through the grommet behind the dashboard is a war. It was a Royal pain in the neck. The job long and testing but through determination I got it done and now I know why the dealer charges $500 for the install. The instructions that came with the harness are terrible. This video is a big help.

The new harness hitch was very easy to install, it took a little bit of time, but not hard at all. Some people on the comments make it seem like it'll be very hard to get it done, but don't get discouraged like I did at the begging. I bought a $50 dollar tool kit since I didn't have any tools and it was just enough to get it install. I wish the instructions were easier to understand, but after reading everything and taking my time under the jeep i was able to figure it out.

Great video. Thank you.

Excellent!

dang! one day i will tackle this install on my own but now it's not the time. the u-haul video i watched before this made it look so much easier. great video tho.

Great man thanx

YOU DAMN NEAR HAVE TO TAKE THE ENTIRE JEEP'S PANNELING APART!!!

Great vid and explanation. Have you a video on installing a brake controller? Especially showing how to patch into the wiring? Steve🇦🇺

Nice video, need same video for the gladiator.

thank you great help

Great video. Could you possibly due an update on the new kit that does not require any of the removal of the interior trim panels?

I installed the hitch on my own. Ask about having someone else install just the wiring harness. Cost was around $750. I think it is time for a wiring harness adventure!

So I have the mopar trailer light wires installed. I now want to put on my tekonsha break control with the wrangler wire adapter. What do I do with the blue wire. I figured there would be another video on that but I have not seen any.

Wow didn't know u would have to dismantle the rear half of the jeep for this

The 2020 is a little different from this Jeep--some of the clips. I'm stuck on the grommet. It's sealed pretty good around existing wires on the outside. Probably going to have to unwrap them and then wrap them back up. Also, the Jeep toolkit doesn't include the panel tool or the tool for the T25s. I used an Allen key for the T25s. The kit for the wiring harness should come with a plastic panel tool considering the price of the kit. The Christmas trees aren't likely to break. They do break. Those should be included too.

Excellent video and great added comments by viewers referencing the newer MOPAR wiring harness. At the end of your installation, did you have to flash, or program, the CPU to recognize the installed wiring harness? I'm reading information about a "Tazer JL Mini" that is supposed to be able to allow the owner to program things like this on their own, although the unit is $329, making the dealership reprogram pricing from about $90 (seen in comments below) to $198 as quoted by my Jeep dealership if they reprogram my computer. I have a bit more research to do on the best route to go, but my new MOPAR towing harness kit is on it's way in, along with our new Wrangler 4XE...lots to learn and plan for. Thank you in advance for any information on the programming you may be able to provide. Regards, Paul

This install is ridiculous🤯

Awesome. When can we see this sort of video for the Mopar trailer brake controller?

If the kit is the same for 2 door and 4 door, is there a need on a 2 door installation to stow the excess harness length in a particular location?

How or is there a video that I haven’t found yet that show how to add a front RV wire harness to this rear hitch harness. Thanks for your help.

Can you do a install on a 2019 Cherokee trail hawk

Is there a part number for just the mounting bracket? Thanks for sharing.

STOP THE PRESS!!! There is a NEW HARNESS! They finally figured out that this is a terrible design and now all of the wiring is done on the exterior. Unfortunately we did not look at our "updated" harness and instructions and spent way too much time taking out trim for no reason. We still used many of your tips and would suggest adding to or clarifying the removal of the white locking tab in the supplied pig-tail harness.

There's got to be an easier way lol. I installed the hitch itself on our Sahara in 30 minutes, but the wiring looks like a huge pain. Can't you fine gents just create a harness as others have pointed out that taps into the rear lights? Plenty of 12V power running back there. Thanks for the install video either way.

Can your company make a hybrid kit that uses the OEM trailer connector and uses just the rear taillights power and switches?

What about for 21 Jeep JLU RHD? The battery it’s on the opposite side so should I do everything opposite ?

The new wiring kit is easier to install, but the directions are horrible (just abstract pictures). I used this video to help clarify how to unlock wiring connectors on the driver side taillight. Also with both kits, be careful to use trailer hitches that do not interfere with large housing bracket for the 4 & 7 way outlets; the mounting holes are predrilled into the rear frame and are very close to the hitch mounting holes, so harness 82216359aa is not compatible with many non-Mopar hitches. JEEP WRANGLER JL NEW BODY 7 WAY TRAILER TOW WIRING HARNESS 82216359AA really needs it's own RU-vid video...

Guess who cheaped out on the towing package, when the dealership said it's only $600 to add to the factory order. not even that but it comes with a bigger alternator and better radiator Cooling. this one hurt boys.

What about the blue wire that you put in the glove compartment

So many satisfying "clicks"......

I just wired a JK hitch over the weekend and it hurts my brain to see how big of an effort it is to wire the harness for a JL.

Terrific video !!!! Does installing this void the warranty ?

If I cut the 7/4way connection hole in my Steel bumper will it snap in? I have the RedRock Solid Steel Rear Bumper with LED Lighting (18-24 Jeep Wrangler JL)

Great video, however it is outdated. I followed this video and removed my interior only to find out the new revised kit runs outside the Jeep. Do not follow this video if you ordered the newer revision of this kit.

question. the instructions say to do the install from the outside. does not show it being done from the inside. you recommend installing the way the video shows easier?

What about the 4 pin connector? does it automatically connect with the 7 pin???

There’s no way I can do that on my own. Lol Great video by the way.

"Double nutting" lmao 😂😂🗯🗯

Ok I done it but no brake lights or running lights please help

Like I said on other videos that I’ve seen. Do you not have a cigarette 12 V plug right by the back tail light it could be either constantly on or switched. Does that not run to the battery itself. It’s got to be powerful enough people plugging coolers into that. I get it if you’re gonna plug in a seven pin and charge a battery in the back but for flat pin I don’t think you need that. your manual says you shouldn’t be towing heavy duty trailers anyway so why would you need trailer brakes? Unless you got a 392 with upgraded axles.

My 2023 Jeep Wrangler high altitude came with the Trailer sway damping. But did not come with a hitch. Does anyone know what that means ?

Is there an updated version of this video? It doesn't match the instructions that came with my kit, which says that I need to route the wiring outside the body, not under the interior trim.

Where does the blue wire tucked behind glove box go?

wow!! I guess I am not towing anything! lol

Thanks, but I'll write the check!

Anyone know if the fuses need to be installed once you do this?

Can you show me again? I volunteer mine as the demo. Thanx in advance.

Any idea what the blue wire will be for? It’s routed under the passenger side/glove box and supposed to be for adding a brake controller but the factory installed version has a plug for the controller under the drivers side. Haven’t found any install information for using the blue wire?

Where does the blue wire connect to?

i did install the kit over 2020 Rubicon but the signal lights are'nt working... can i have your advice for that plz..

The kit works great, but there is no information, or I missed it, on where the blue wire is to be connected?

Wat sorta rivet gun do i need

this process has changed with the 2021 wiring harness, it now routes under the vehicle.

What wire do you tap into for brake signal on a trailer brake when adding this kit?

What about the blue wire left at the glovebox?

Can anyone tell me if the kit in the install is the 82216359AA or 82215896? The link in the title goes to the former (59AA), but based on comments, I think this might be the older style (5896) which...I think I prefer the routing of even though it's more complicated.

How different is it for the diesel

2:31 it is absolutely not necessary to mess with the interior trim. Also, Mopar harness now has all wires and fuse wrapped up in outdoor-rated tape. Simply tie new wires to existing wires running under the car. The only item that needs popping off is rear lights and a few tabs, if the car has inner fender liner. Please follow included Mopar instructions. This guy’s process is discouragingly complex.

Mopar’s newest trailer warning harness kit part 82216359AA is slightly different and does not allow for easily getting through the firewall, so these instructions will not work for the newest Mopar harness kit.

Hi! Thanks for the video again! I just installed my harness but I think the new harness has couple of minor differences. So the next to the cable that goes into the fusebox, I have a blue cable that (brake control) - I don’t know what to do with it. Instructions don’t really explain well what to do with this blue cable. Does this mean I have a trailer brake system or that is something else that I would have to add to the system. I’m little confused can you please explain the trailer brake situation?

Mopar has changed the wiring and you no longer dismantle the interior of your Jeep. You now only need to pin the Y harness behind the left tail light and the plug for the 7 pin.

Is it possible to run the wiring underneath the jeep to avoid the hassle of taking apart half of the jeep??

Hey where the blue wire get connect he never said thanks

I'm contradicting myself because this video is helpful and, at the same time, not accurate for the 2020 Jeep Wrangler JL?! Meaning if you move forward with the installation yourself, you will have to make some modifications to the wiring harness. Unfortunately, Mopar redesigned the wiring harness after this video was created and Mopar's limited instructions have you running the wiring harness underneath the vehicle instead of inside the cabin. Unfortunately, I did not unbundle the wiring harness until I had completely disassembled my interior and didn't realize it until it was too late. So, if you want to have a more professional install and run the harness through the cabin, this video is excellent for showing you how to do that. The problem is that Mopar has the red power wire securely tapped to the black ground wire and the light blue wire for the parking brake. And they are all the same length! It took me about an hour to separate about 3/4 of the red wire from the other two. I had to splice the red wire to attach it to the fuse box to run into the engine compartment because the transistor on the red wire is too big to try to run into the cabin. I had to make some other adjustments. The other problem was that the 7-way trailer connector that connects and drops down from the rear passenger taillight wasn't long enough to reach the 7-way trailer bracket. The bracket is supposed to be bolted on the driver's side of the hitch. Therefore I had to drill and tap the frame on the passenger side of the hitch and connect the trailer bracket there. Frustrating and a good learning experience at the same time. It took me about nine hours for the install.

Como conpro el conector de la trailer

This video needs an update. The Mopar wiring harness is now all connected, no separate red wire harness. You do not have to take all the trim pieces off of the passenger side because the wiring harness is now designed to go under the vehicle...now it's just removing the passenger side rear fender liner. The ground lead now connect to the grounds by the fuse box.

What happen whit the blue wire ??

Does this kit work on the 4xe? I can't get a straight answer from the dealer

Is my JK the same as a JL? What is the part number for the 5 pin harness only?

Mr jeep is still live until you disconnect the wire he said to not disconnect at the fuse box terminals. This is the auxiliary battery wire going to a second battery well well hidden behind the wheel well liner. The dealers don’t even know this. - my jeep became electronically locked up , and the dealer couldn’t disconnect all power to computer until I figured this out the hard way….

Unfortunately this is outdated, newest mopar harness goes under the vehicle, not through the body, or firewall. Good way to get familiar with most of the work though.

Anyone recognize the trailer at the end of the video?

Amen C

The kit you sell is a made by mopar?

Getting the wiring through the grommet in the front is near impossible. Not sure wtf Mopar was thinking. Ended up cutting it out of there.

great video! shame that jeep doesn't include this as a basic thing.

Why is there so much dust under the hood? And the wheel wells need washed water 🚿 🧽

The new kit comes with one harness and you cannot pass it through the grommet, neither do you have to run the wiring inside under the trim.

F that, I’ll option it at sticker lol

UPDATE THIS VIDEO FOR THE NEW KIT

Video does not match the instructions for my 2018 JLU. No need to tear the entire inside of the Jeep apart. Apparently the wiring harness has been updated also since my "red" wire is built into the main harness.

Mine goes under the car and it’s from mopar, they probably changed it for easier installation

Buy the curt kit you don't have to dismantle you jl jeep

The 22 is different.

I was told that after the install, I would need to go to a dealership to have the computer upgraded to recognize the harness. ANY TRUTH TO THAT??

Just got to be a better way maybe tapping into the aux power supply in tbe rear. This guy nearly took the jeep apart