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Roadmaster Tow Bar Wiring Kit Installation - 2014 Jeep Cherokee

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How to Install a Roadmaster Tow Bar Wiring Kit on a 2014 Jeep Cherokee

Today, on a 2014 Jeep Cherokee, we're going to install part number RM-154. This is the Roadmaster Universal Hy-Power Diode Wiring Kit. Before we do any work, want to make sure that the key is in the off position. The electronics in this vehicle are so sensitive that if you disconnect the tail lights, it could cause the computer to malfunction.Let's go ahead and open up the back hatch. Here are two fasteners that we have to remove to take off the tail light. We'll use a T30 torque bit to remove the fasteners.

If you'll rock the lens a little bit back and forth and pull straight back. Now we'll go ahead and remove the wire harness from the tail light. We'll push down a small tab right here and we can pull it apart.We'll be working with the driver's side tail light. We got it on a towel to help protect the lenses so when we set it down we won't scratch it. This socket right here, we have to loosen up from the bracket.

There's a small tab you push down about right here and you can pull it apart. You see the connection point here. This is intended for an upgrade for a towing package. However, in this case when we install our diodes, we want to be as close to the tail light bulb, in this case, LEDs, as possible so were going to go past this junction and install right here.So lets get our wires ready. We need to get the tape out of our way.

We tested these wires earlier using our tester and found out our green wire is a left turn signal and our purple wire is our running light circuit. Anytime you apply power going into the circuit you always want to use a diode. Thats what comes with the kit. To do that will just go ahead and cut a wire in half and add these terminals, one to each side.Out always goes towards the tail light and this in is for our input from the vehicle. One of these wires is going to the input and then our other wire harness which is powered by the RV will go into the other tab.

It doesnt matter which tab you use. Well go ahead and mark our diodes too; put a L for left turn and well use a R for our running light circuit.Lets go ahead and take our terminals off our diode first. So well work with our green wire first. Well cut it in half, strip the wires back. Its a very fine gauge so you want to be careful with it. And well go ahead and install our terminals. Lets go ahead and install our diode. This is our left turn. Remember we want our output going to our tail light. Output to tail light, input from our vehicle. It does not matter which tab.Were already done with our first circuit. Alright, so weve got our left turn signal, and this is actually our brake signal as well because its combined in this car, and it will also be combined coming out of the RV typically. So were done with our left turn and brake signal. Now our running light circuit. That will be our purple wire. Lets get our diode out of our way as best we can and install the second diode.Remove our terminals. Youll notice that there is one yellow one. Well put that off to the side for now because we have a special use for that. Lets go ahead and install our diode out to the tail light and our input. We have to unwind our wires just a little bit to give us some slack. Alright, were done with our driver side. Lets go ahead and do the same thing with the passenger side.Lets go ahead and repeat the same thing on the passenger side. Well go ahead and remove our tail light like we just did before and then well go ahead and mark our diodes. Well make this one RT for right turn and well make this one just R for running light circuit. Lets go ahead and remove the terminals from the diodes. Go ahead and release our socket to give us some working room and well cut our wires just like we did before.Its going to be the same colors on both sides. Well go ahead and separate our two same wires. Well work with our green wire first for our turn signal. Lets go ahead and add our terminals. Lets go ahead and install the right turn signal. Single tab to the tail light, and then our input is here. Next up, our purple wire.Single tab output, and our input. Now we have both our taillights prepared which I think this is the hardest part. Now on to the easy stuff. Lets set our taillights aside. Lets go ahead and work with our wire harness. Thats about a 30 foot long harness here and weve got two four-pole ends. We dont need one of these so lets go ahead and cut off one end. Well go ahead and take our four-pole end and well go to the drivers side tail light and well go ahead and run this between the body and the bumper cover on down to the ground for now.Well go ahead and pull it out the bottom to take up our slack as well. Were not going to take all of it and push it down there. We need to leave enough well pull it back out because eventually two of these wires are going to have to go over to our passenger side. Well just go ahead and just kind of loosely lay it out to see how much we need to get to our passenger light. Eventually well have to split up all our wires, but well work with one wire at a time. First off, well go ahead and split off a white wire. This is going to be ground.Well go ahead and pull it apart a little bit, and on the end here well go ahead and cut it and well add a ring terminal and attach it to the body work for ground. This is going to carry our ground from our RV to our car. Lets go ahead and pull apart our brown wire now. Were going to cut this wire in half. For lack of a better term, were going to put it back together again. What were creating is actually a junction that will go to our drivers side tail light for a running light circuit and then also over to our passenger side. Thats why we need that yellow terminal; so it can accept both wires.Alright, now lets go ahead and work for a yellow wire. This will be simple, just like our ground wire. Were going to cut this wire in half. Basically the same thing like we do with our ground wire. The rest of this yellow wire is not even going to be used. Well go ahead and add a terminal to this end and this will be ready to plug into our diode. So now weve got our two wires that are ready to plug into our diode thats already been installed into our tail light. Lets go ahead and get rid of our excess wires. Well get rid of our white wire and our yellow wire because we dont need fees to add to the confusion.Now that weve got our two separate wires, well go ahead and keep them together by using some loom material. This loom material does come with the kit. All right, weve got our loom material on our wires. Now well go ahead and what were going to do is pull away on the weather strip. We want to make sure we can tuck it behind the plastic; then our seal can go back into place. Lets work one small section at a time, tying it in place. Were just using a typical plastic tool that you can find at any auto parts store to help tuck in a wire.Lets go ahead and put our terminals on the end of our wires now and well get our wires prepared to plug into the diodes. All right, lets go ahead and make our final connections. Now, our brown wire is going to be our running light circuit so well go ahead and run that right to our diode labeled R for running light circuit. Our green wire will be for our right turn signal, so well go ahead and run that to the diode labeled RT. Lets go ahead and plug the factory wiring back into the tail light and we can go ahead and reinstall our tail light. Look very carefully, since theres a lot of stuff behind the tail light now.All right; just like before, well go ahead and hook up our diodes. Our brown wire is for our running lights, so well go ahead and run it to the diode labeled R for running light circuit and then our left turn signal will go to the diode labeled left. Lets go ahead and plug the factory wire harnesses together and we can go ahead and install our tail light.Okay, at this point, we have our vehicle electrically connected, so its a good idea to go ahead and try it out before we run our wire from the back all the way up to the front just to make sure everything is working. So at this point, you can simply just back it up to your RV and try it out. Well go ahead and try out our running light circuit first, then our left turn and our right turn. Lets go ahead and try out our brake signal. Now that weve verified that our circuits work and everything, well go ahead and start taking our four-pole wire and running it towards the front of the vehicle. Now, when we do this, we want to make sure we stay away from anything moving, like suspension components or steering components up front. Also want to stay away from the exhaust as well.Well go ahead and zip tie it to secure it. Now, theres this rather large panel that we unbolted, and then we just went ahead and just let the panel hold the wire and secure it in place as well. Now, when we run our wire up to the front, we used a pull wire to help pull it from the bottom to the top; in this case, an old piece of air line tubing. We can just go ahead and just tape it to the bottom of the wire and pull up. Its pretty complicated around the suspension, so its just easier I think to come up and over and then back down the grill. With the small plastic cover, we can go ahead and slide it underneath.To do that, well go ahead and remove some rivets, sometimes a trim panel tool also helps. Well go ahead and zip tie our wires as best we can. Then well go ahead and reinstall our plastic rivets. Well go ahead and rout down towards the grill at the bottom and well go ahead and cut a hole that will be eventually used for a break-away switch as well but we could use this also to run our wires. Well go ahead and zip tie it to secure it. To make our wires look nice, well go ahead and use some loom material to help cover up the wires. Okay, when were not using it, we can go ahead and tuck it behind the grill.With that, thatll finish it for our install, part number RM-154 from Roadmaster. This is the Roadmaster Universal Hy-Power Diode Wiring Kit on our 2014 Jeep Cherokee. .

Questions and Comments about this Video

Steve M.

I had your wiring harness installed by the person who installed the base plate on my 2014 jeep cherokee and I noticed that the licence plate light was not working when hooked up to the RV. My question, is the licence plate light suppose to work and if not, do you know if it is required by California or any other state law.Thanks for your help.

Etrailer Expert
Reply from Rachael H.

As far as we know yes the license plate light is supposed to be illuminated when your Jeep is being flat towed in all 50 states. However, it would not hurt to check with your local DOT office for clarification. In some vehicles the circuit that illuminates the license plate light is the same as the running lights, or other lighting signals that would have been used for the diode wiring install. But is sound like in your case this is a separate circuit and you might have to have another wire run to activate this light. You would need another wire run off the RV side of the taillight wireing, with a diode installed in-line. You would need an extra diode, like # RM-790, an extra length of at least 14 Gauge Wire like # D07550 (sold by the foot), and a splice connector like # 804c for this installation.

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