Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Quickly and easily install a 4-way trailer connector on your Jeep Grand Cherokee with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.
Note: Early production models built before April 1994 require wiring harness 118348, if built March 1994 or beyond, 118349 is correct.
This custom-fit T-One connector plugs into your Jeep Grand Cherokee's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your rear cargo area. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.
Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area.
It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
A ModuLite power module is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your Jeep Grand Cherokee's three-wire system need to be combined so they are compatible with the wiring system of your trailer. This power module functions as a tail light converter to combine the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your Jeep Grand Cherokee operate.
With a ModuLite, your trailer's lights will be powered without overloading your Jeep Grand Cherokee's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.
Video of T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today on this 1998 Jeep Grand Cherokee, were going to install part number 118349 from Tow Ready. This is the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. To start off, we need to go ahead and get inside the vehicle to get access to the wiring. We need to remove the spare tire and well go ahead and remove the threshold. Threshold is out of the way. Underneath the threshold are a couple of screws, one on each side.
Now, well go ahead and take off the tie down points. Now, all these parts will go back here when were done.Theres a fastener right here. Well use a plastic pry bar and help pull it out. This will give us some working room. Well do the other side and do the same thing.
Now, well go ahead and find our connection point, just like the ends on our T connector here with the yellow wire. This is for the drivers side. We actually popped that loose so its going to make it easier to see. Press down on this side of the tab. Pull it and pull it apart.
For our T connector in between 2 pieces they click back together. Next, well go ahead and take our T connector with the green wire. Route it behind the plastic and well go ahead and pull out the slack then well route it towards the other sideWell go ahead and find the connection point over there and then go ahead and attach it. All right, we have those connections ready. Lets go ahead and put them back we originally we're at.
We can hide it in this little pocket here. It has an insulation in there. I dont like to go ahead and just hide underneath the carpet. Now on the passengers side, well go ahead and put our panel back into place. Were going to put these connections back into place. All right, now back on our drivers side, lets go ahead and work for white wire with a ring terminal. We need to attach that to the sheet metal on the inside.All right, next well go ahead and work for red wire. This end eventually has to be ran up to the front of our 12-volt power supply. To do that, we need to run it outside the body of the vehicle and then up towards the hood. Were going to route ours up behind the tail light. Well go ahead and take the tail light off. Well use a 10-mm socket on these bolts. You pull it straight back, and well go ahead and make a slit in this ground right here and pass the wire through. Lets take our black wire that comes with the kit. Push to the slice we made in the grommet. Lets go ahead and put our tail light back into place. Look for it on the inside and pull it out.Well use the supplied butt connector and connect these two together. Now, well go ahead and take our module well attach to the sheet metal right here. Lets go ahead and take our black wire. Well go ahead and route it down below and blow the bumper for now. Lets go ahead and put our tail light back into place. For now, well leave our 4-pole out and well go ahead and put our panel back into place. Well go ahead and reinstall our interior.All right, now when we run our wire towards the front, well make sure we stay from anything moving like suspension components or anything hot like the exhaust. Also, when you go towards the front of the vehicle in the engine compartment, you want to stay away from the steering components as well.Now, well go ahead and show you how to run our wire. Heres the wire that came down from behind the tail light and zip tie it to the hitch using extra long zip tie. We zip tie to the line going across the top of the suspension. We threaded it through and just keep following the lines along the frame rail going up towards the front. Then going up front, were going to use a pull wire and bring it from the bottom to the top. Now, were using the old piece of air line that we ran from the top to the bottom. This is also going to be any piece of wire that can hold its shape and we can thread it through.When we routed ours, we stayed inside on the far side of the drivers side as possible because youll end up being close to the steering components. Were going to attach our wire to our pull wire and well go ahead and pull it back up through. I dont have much to tie our wire to, so I'm going to add some loom clamps. This is part number A0250. Were going to use the number 8 self-tapping screw that uses a 1/4-inch hex driver. Well go ahead and attach a fuse holder to the end of our wire hire. Well connect it up to our 12-volt power supply. Lets go ahead and add our fuse holder.Well go ahead and cut the loop in half. One end will get a ring terminal and the other end will get a butt connector. The butt connector will go to the black wire. Well protect this connection with some electric tape. Now, batteries can get corroded up and lose connections or collect mud debris in this case. Were actually going to use as little bit different point. Put our power right here. Well go ahead and use a 13-mm socket and the ring terminal will go to our power supply. Well go ahead and put the nut back into place. Put our fuse into the fuse holder with the cap on. Lets tuck that safely away down the side of the battery.All right, lets go ahead and try it out. Its always good to use a light tester on it before you try it on the trailer. Well take a ground clamp and connect to the white wire and well test the brown wire for our ring light circuit. Yellow for left turn, green for right turn, and our brake signal will be a solid signal on the yellow and green wires. That will finish it for our install of part number 118349 from Tow Ready on this 1998 Jeep Grand Cherokee. .
Average Customer Rating: 4.8 out of 5 stars (57 Customer Reviews)Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.
by: Robbin S.06/25/2013
Fast service, correct product sent, and very helpful and knowledgeable staff. Thanks for your great service. I got my product in the time you said and I found it was easy to install and everything fit as described.. I am attaching some pics of the installation process.Thanks again. 86151
by: Leon A10/28/2012
I ordered this converter for my 97 Jeep Grand Cherokee. After a 2-3 minute read of the instructions I proceeded to access the tailight plugs on my vehicle. You will need to remove the spare tire and open up both left and right side panels in the rear of the vehicle to gain access to the rear lights harness. After that it was simply unplug the existing connectors, plug in the adapter, route your wires under the tailgait cover panel, connect a power wire to a battery source and reassemble. Easy to do. Took me about 20 minutes and I was done. The Etrailer adapter kit was litterally plug and play. Works great. I am satisfied with my purchase and would recommend to anyone. 58212
To start off my harness was delivered 4 days after ordering.I dont know what there thinking over there @ e-trailer but it's suppose to take 7 days! lol. I am glad that it did come in so fast. The instillation was very simple (i did watch there video,very helpful.) took about 15 min. to hook the harness up ,the time consuming task is running your hot wire to the battery. And that just depends on how picky u are with your work. Then of all things it worked!! lol. It realy does work like it's supose too! e-trailer I give u an A+ Thank u for making my task easy. 5904
Very Good design and relatively easy to install. Works as described, was very impressed that my vehicle wiring harness was spared after the rental trailer I hooked up to deteroiating wiring shorted out. Since I prefer to run wiring along established safe routes within the vehicle (instead of as suggested in the installation instructions and video) an extra 2ft of primary lead wire and and extra foot in the right side signal harness would have been beneficial andf appreciated. 106172
Poor Instructions Product fits great. Instructions have you run the positive lead wire down passenger side, under vehicle, which is the side the exhaust system is on. Very difficult to keep away from heat no places to zip tie it to. I routed wire accross back of engine, zip tied it to existing wire harness, then pulled it through existing hole in fender. Under the vehicle on the driver side, you can zip tie it to the brake lines out of harms way. 1274
by: Mark T.07/08/2011
I am installing this harness this weekend so I cannot give a product review yet, but would like to praise Etrailer's service. Email confirmations were immediate and shipping was prompt! I recieved the harness within 3 days after placing my order! The price (with shipping) was much better than my local RV or auto parts store. This is my second purchase from Etrailer and I'm a satified customer! 18948
by: Ronald Godwin10/13/2011
It works very well but I think the instructions need to be a lot more detailed for most people. It took some time to figure out a few things and the fuse that must be installed does not explain what to do very well at all, (Thats the yellow thing up there in the picture). Other then needing much better instructions it is a great product and I WOULD buy it again without any problems. 25517
Good. but tough to install Our 1998 Grand cherokee DID NOT HAVE the little access panel that is shown in the instructions and photos. That meant taking out several interior panels which was a huge problem since the fasteners usually break. The lengths of wire worked OK, but what a hassle getting access to the vehicle wiring! Our 1997 had the little access door the '98 didn't. 1816
by: Bob P.06/27/2012
Called etrailer.com at noon on Thursday in a bind and needing a wiring harness for my 1997 Jeep Grand Cherokee. With the assistance of the sales woman I placed an order and requested over night shipping. I received a package by noon the next day!!! Hooked up the wiring harness and it worked great!! Just in time for my weekend camping trip with my pop-up camper. 45758
My review is mainly for etrailer and not just the product. First order I placed with them and it was on a sunday morning, got and email that day letting me know the item was in stock, notified on monday afternoon that it shipped, and received it on wednesday. Etrailer will get more of my business and I would recommend them to others. 26315
by: David W05/28/2009
Well made, easy to install Liked the instruction video. It was easier to understand than the written instructions. Everything from ordering to installation was easy and well thought out. It wasn't the lowest price but the website gave me confidence that this was the one for my car and everything was included for an easy install. 1904
by: Steve F02/16/2015
This is an excellent product and a time saver. I almost started splicing wires and found it very troublesome so I researched 4 prong trailer hook ups and found this awesome harness. The video is a must see! Very simple and easy to follow. Now I will have a professional looking job that taught me something about my jeep. 175007
Review would have been excellent except the primary wire from the battery in the right front to the trailer connection area in the left rear was barely long enough. I had to try 3 different routings to get one that would make it. Instructions were clear and the videos were a real help. Service also outstanding. 171742
by: Mike S05/26/2014
Great Product. Detailed and accurate instructions. etrailer got my order right the first time, which is something another company could not get right, twice. Item arrive 1 day ahead of date originally scheduled to arrive. I am very pleased with this product and etrailer as a whole. 132407
by: brian r.05/15/2008
Good but Worked well but the positive wire going to the battery needs to be several feet longer for the 98 Jeep Cherokee Kit. I had to run it on the inside of the vehicle to have enough wire and still barely had enough. Had to remove several interior trim panels in the process. 866
by: Keith R12/11/2010
Easier than I expected. Follow the video instructions and you can't go wrong. Route wire under truck along driver's side and you'll avoid most of the hot, exhaust system. Product works great! Installed on 96 Grand Cherokee Laredo with the tow package. 3981
by: clifton m.04/09/2012
the product was packaged very well and all parts were there. other than having a little difficulty getting panel off jeep all the conections and routing whent extremely well and was completed in a little over an hour.and everything worked perfect. 36716
by: Dave Byers06/28/2013
The trailer wiring harness arrived within a few days of ordering and installed in minutes and is working fine.. Everything I needed to make the harness connection was included and I am very happy with the whole ordering process.. thank you 86632
by: Ken E04/18/2012
the harness was easy to hook up.the t connector is the key. no trying to tap into wiring harness, just plug in.. Then run a small wire from the battery to the harness and hook up a ground wire to frame and you are good to go. 37651
by: Billie K.03/20/2012
It was very easy to install . I am very happy with the product. I wish they gave about six more zip ties in the kit though! Had the harness installed in an hour or less. I would recommend this product to everyone! 34538
This harness was very easy to install. Had no trouble hooking it up. I would purchase this product again if needed. The shipping was fast. I will be ordering more off e-trailer in the near future. 121316
by: Pete B.06/21/2011
This wiring system was so easy to install. eTrailer.com provided a great online video tutorial of the installation. That helped a lot because the instructions from the manufacture was limited. 17517
The kit contained every thing needed for installation. Clear on line instructional video made it simple. The in-line plugs made connection into my Jeep's wiring harness easy and clean. 24594
by: Buddy J07/23/2012
Items ordered arrived fast and i received everything I needed. Instructions were included and online video answered all other questions. Great folks to deal with here! 49098
by: Jason C06/22/2012
Wiring harness installed in 30 minutes, super easy being that my 12v power wire was already in place from the old harness. Great service and extremely fast shipping. 45182
by: chris p04/30/2012
easy to install, but fuse line instructions and where to connect it on the black box were not as clear as they could have been. no markings on the black box. 38801
It was very easy to install Everything that came in the package was exactly what I needed. It helped to watch the installation video on youtube. Thanks 1759
by: Ron Hartl03/01/2012
Great Product. Excellent Quaulity. Easy online video instructions. Below average Price. Great Customer Service. it doesn't get much better than that. 32919
by: Phaedra W.02/11/2012
easy to order / recieved in 2 days /easy to hook up / pluged it in / on down the road we went pulling our trailer.. No problems as of this date .. 31488
by: Matt S05/03/2011
It came fast, and installed fast! I just added a little shrink tube over the splices under the hood but it probably wasn't necessary. 12834
by: Clint Powell06/20/2011
trailer harness is working fine. you should put a flyer in your packaging or email a link to your youtube videos of installations. 17418
by: Gerald J. Latiolais01/07/2011
Product shipment Without a doubt, this is the best service I have ever had from a distributor. Thanks !! I'll pass the word. 5177
by: Mark T10/25/2013
Excellent Product , Great Directions , Prompt Shipping , I will definetly purchase more items whem needed from etrailer.com 105190
by: chris little06/15/2012
but i think you need to provide better illustratio maybe some pics on here of the installment of said product .ty chris 44220
by: Jasper Pyles10/27/2014
Good product. What made it great was the amazing assistance I got from Nicole. Highly recommended company. 157982
this wiring harness works great ,very easy install.very good price,i did check around. thank you 67278
This was an excellent experience. The part fit perfectly. Install was a snap. Thank you etrailer. 166671
by: Richard H.05/22/2012
Great, arrived very quickly, just followed the video on the site and was very simple, works great 41265
by: Mike R.06/07/2013
Easy to install. Video on your web site was very helpful. Could have used a few more zip ties. 83768
The harness kit was very complete, and installed as shown on the video. Excellent product. 42963
It was very easy to install and it works great! Highly recommend this product for others! 144572
by: Tom White04/28/2014
Instruction were great, there were sufficient quantities of items required for the task. 127815
Great product! Fast shipping! Extremely easy to install!! Thanks very much!! 38848
excellent service great service loved shopping will do again a +++++ 4163
by: Pete E.08/07/2014
Courteous service, fast delivery. Taillight converter works great. 144973
Very fast shipping. The wiring harness is very well built as well. 118484
Easy to install following the video instructions and works well. 163501
by: Dana H06/06/2011
awsum trailer hook up!!!! simple to install and SUPER service!!!! 16197
by: Eric L.06/29/2011
Fit well and worked well. Instuctions made install a breeze. 18169
by: Wil M.04/28/2013
Easy product to install thanks to the video how-to. 78182
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