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Roadmaster Tow Bar Wiring Kit Installation - 2017 Jeep Wrangler Unlimited

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How to Install the Roadmaster Tow Bar Wiring Kit on a 2017 Jeep Wrangler Unlimited


Hello neighbors. It's Brad here at etrailer. And today, we're taking a look and installing the Roadmaster diode wiring for a 2017 Jeep Wrangler Unlimited. Now, the diode kit is gonna be available in a few different configurations. You can get it with no connection up front. You can get a four-pole as well as one with a six-pole.

Now, if you opt for the six-pole, you're gonna be able to pick from a few different options of your umbilical. And you could get a straight cable, a hybrid cable as you see with both, or one that is coiled throughout. Now, there's gonna be five main components that you need to flat tow your vehicle. First one is gonna be the base plate. And what that's gonna do is attach to the frame of the vehicle and create the connection point for our tow bar.

And that's gonna be our next one, which is gonna be our connection point between the vehicle and the actual RV. Now, moving along, we're also gonna have our safety chain loops here, and that's gonna keep the vehicle attached to the tow bar and RV in case of an accidental disconnect. And that way, you don't have a vehicle just rolling down on the highway. Going along with that, you also need your supplemental breaking system, which is required in a lot of states. And you're gonna have a breakaway switch here and that's gonna bring the vehicle to a stop in case of an accidental disconnect.

And you also have your diode wiring. Now, what that's gonna do is transmit the turn signals, brake lights, and running lights from your RV to your towed vehicle. So, that's gonna allow people behind you to know when you're signaling, breaking, or just driving at nighttime. They're gonna see that vehicle. Now, there may be a sixth component and that, in this case, is gonna be a high-low adapter.

This reason being is you want the height of your RV to your tow vehicle to be within a window of less than three inches. And the way to determine that is you're gonna measure the center of the hitch pin hole to the ground, and then the center of the hole here on our base plate to the ground. And take those, subtract it, and if you are greater than three inches, you're gonna wanna pick up the high-low adapter that brings it under that three inch threshold. We'll start our installation by taking our wire. And I've just put a little bit of electrical tape here where we're actually gonna have our electrical connections later on. And that way, it's not gonna move around as I pull the wires back cause we are gonna have to get back to our taillights. So, the main thing I did is try to stay away from any hot or moving parts, and also use a lot of the factory wiring. So, let's go ahead and trace this. Gone ahead and used our crossbar here to just kind of zip up. We'll be following the four colored wires here and this is just gonna taper up. And I've gone ahead and looped it up over the front sway bar. So, using a lot of the factory wiring, I just kind of put a zip tie every couple foot, or maybe 16 inches just to make sure that it's holding up in place, or any turns or bends also helps. Now, at this point, I went over where the actual engine now is. And it is kind of close to the exhaust here but kind of left with not many options. And there is a factory wire loom that I've attached too up there. Gone ahead and just kind of continued it along. And then also, to make it a little bit easier, I kind of routed it up over on the frame rail. That way, I could work on the outside of the vehicle, kind of just drape this along. You do have your fuel tank as well as some more wire loom to attach to up top, which is good. And just kind of made my way to the back here. Then I've gone ahead and just routed up over the fuel tank and over this shock mount here. That way, it's not in the way of anything moving. And then I just continued on over to our rear cross member here. And again, this is the heat shield, so that should protect a lot of that wiring and just, I followed it along. And then once we got to this back passenger corner here by this bumper mount, I went ahead and split off our wires. So, we're gonna have our white wire, which is gonna be our ground. And that, honestly, can be grounded anywhere along this run. So, if you wanted to peel the wire back and attach it, that's fine. I'm gonna actually go ahead and I'll ground it somewhere under here. I've also routed off our green and that's gonna go to your right turn signal. I've also ran the brown as well and that's gonna be just for our taillights and brake lights. And that's actually gonna need to jumper over, which I'll show you. That leaves us with our jumper wire as well as our yellow, which is gonna go over to our driver's side. Now, we can actually route our wires up behind the taillights. And to take your taillights off, you're gonna have four Phillips head screws. So, just go ahead and remove those and this should separate pretty easily. Now, this one has had some wire splicing into it previous. So, from the factory, yours is gonna look a little bit different. And I'm gonna show you what that will look like as they just added a jumper harness onto here. But what you're gonna have is gonna be something like this. And so, what you're gonna do is simply push on this clip. Sometimes these can be a little tricky to separate but it should separate like that. And that's gonna give us our wires here. And these are gonna be the ones we're gonna tie into with our spade connectors. Now, I've actually gone ahead and tested for our brake light as well as our turn signal. And we've determined on our driver's side that we're gonna have white with orange, and that's gonna be our brake light and turn signal light. And then our running light is gonna be our green. So, we're gonna want to actually keep these kind of separated. And sometimes there's gonna be a little insulation wrapped around these wires. I would say go ahead, peel that back as far as you can. It's gonna make it a lot easier to not only get these installed, but also to actually have room to move around to plug this back in later on. You can see I have a yellow and a brown wire. These we're the ones that I ran across from our passenger side. And the yellow is gonna be your left turn signal. And the brown is actually a jumper wire that's gonna go from both sides of the vehicle. So, on this side, I'll just be making the simple connection. But when we go back to the passenger, I'll show you where I've actually doubled those up in a spade connector. So, we'll be splicing into these. And the way it kind of works is I'll be cutting our orange here, the white with orange, and that's gonna be the brake and turn signal. So, that's gonna take one of the diodes, and then our running lights will be the other diode. And really what it's gonna do is kind of sit in the middle here. So, we're gonna have one portion of the wire once we cut it here. The other one on the other side. And this is gonna be where we tie in our actual wires that we've ran in. So, it's gonna be pretty easy here and I'm gonna walk you through these steps. So first, I'm gonna go ahead, remove our spade clips as we are gonna need to have those loose to be able to attach this. And then I'll just go ahead and make the cut here. Now, again, I do try my best to kind of go far back away from the plug. That way, when you are plugging it back into the taillight, you have a little bit more room to work with. The Jeeps are a little bit easier because you do have a nice, big pocket here. You don't have to worry too much. But we'll just go ahead and just strip these back a little bit. So, we put our spade connector on there and then we're gonna crimp this down. Now, with all of these connections, I always go back and just kind of give it a light tug just to make sure it's not gonna fall out. Sometimes if our crimps not on there properly, that can cause it to be loose. And that's gonna cause us a little issue later on if we have to troubleshoot why the lights aren't working. So, I have both ends of our brake and turn signal wire with spade connectors. So, the out is always gonna face towards the plug that goes to the taillight. So, we can go ahead and attach that. And then I'm gonna go ahead and attach this up top, which leads us to one more wire that needs to attach here. And this is gonna be, since it's our brake and turn signal here, this is gonna be the yellow, which is gonna be for our left turn signal. So, I'll go ahead, get our spade connector on here, attach it and that'll be one diode down. And it does kinda get tight here with these spade connectors, so just may make sure you actually are going inside in the middle. It's easy to actually slide above or below that clip, but once you have that in place. So, now that we've got this one attached, we're gonna go ahead and do the same process on our green wire here, and our brown wire is gonna go where the yellow one is. So, we'll go ahead and make those connections real quick. So, I've gone ahead and I've just zip tied the diodes together here. I've got all my plugs back together. So now, I can actually just plug our taillight back in and get this all buttoned up and then we'll meet up on the passenger side. So, here on our passenger side, it's gonna be pretty similar. Our running light is gonna be purple and white. And so, I've gone ahead and attached those. Now here, you're gonna see the yellow spade connector here with the two brown wires. So, our brown wire, we attached on the other side, this is just going down and meeting up with the rest of the wire that runs to the front. So, this is where it jumpers in. So, it doesn't really matter which side you do it on, but your brown is gonna need to connect to both the diodes. Now, on the other one here, you can see that we have our green. And that's the wire that we ran up for our right turn signal and our brake light. And that's gonna go to our yellow and white. So, we'll go ahead and make those connections there. I've gone ahead and zip tied this back up. And then now, we can just attach our taillight and get this back in place. So, now that we have all of our lights and wires buttoned up, we still need to do our ground wire here. So, I'm gonna go ahead and I'm gonna just cut this cause I know that I can mount somewhere up here on our chassis to get a good ground. And we're gonna be attaching a ring terminal on here and that's gonna be supplied in the kit. And then we'll be using a self-tapping screw. We're gonna drill into the chassis. So, you wanna make sure you find a nice spot that's gonna be part of the actual frame. Now, you don't need to get too tight just as long as that ring terminal isn't flying around like this. I'm gonna give it one or two more bumps here. And that should be good. Now, with this wire harness, you actually have your four-pole on here. And most times when you're flat towing a vehicle, this will need to be a six-pole as the RV's gonna be a seven. So, a lot of times you're gonna have your umbilical that's going to go from the six to the seven. So, here we have supplied with our tow bar our six-pole connection. So, we're gonna go ahead and get these connected into this real quick. I'll start by cutting these. So, I'm just gonna go and kind of splice or strip these back a little bit. Now, this customer is using the Roadmaster Nighthawk tow bar and that's a very nice tow bar. But depending on what you are picking up, yours may or may not come with this. Ours did, so we will be using this. And if yours does not or you need to pick one of these up, we actually have a bunch of these here at etrailer that you can pick from. Now, before we make our connections, you're gonna wanna take the rubber boot that's on the back side of the plug and you're gonna slide this up. And that's just gonna create a nice seal on it later. But we'll need to come back to here and you're gonna see there's gonna be little Phillips screws on all of these little terminals. So, what we'll do is we're gonna just back these out just enough to where they're still in there but it's gonna open this gap up for us to put our wires in. I really suggest doing this in a nice, clean spot just in case one of these drops cause you will need them to make the connection and they are hard to find. So, also don't back them out all the way. And mold it onto the plug. There's gonna be some letters and that's gonna tell us where we actually need to run our wires. So, the first one I'll look for is going to be our ground and that's gonna be our white wire. And so, that's gonna go into the spot labeled GD. So, to get this in place, I'm simply just gonna kind of twist this up. Put our GD slot, we'll slide that in there. And then once your wire's in place, hold that. And then you're gonna wanna just tighten this down. You don't have to get too crazy but just make sure it's snug. And then we're gonna continue on. So, I'm gonna do my green and yellow here. So, our yellow is gonna be our left turn signal. So, mold it on here, should be LT. Next, we're gonna do our green, which is gonna be our right turn signal, so RT. And last, we have our brown and this is gonna be our tail markers, so this is gonna go into TM. Now, you are gonna have two that are unused. If you are running a charge line, which allows your vehicle's battery to charge while flat towing, that's gonna go into this center one. That's gonna be the 12 volt auxiliary. So, now that we have this connected, I'm gonna be using a test box to hook up to this and run our lights signals on the vehicle just to make sure they're working. If you don't have a test box, you can actually hook this up to your RV with your umbilical and run the turn signals and the lights as well as the running lights on the RV and see if they correspond to the back of the vehicle. We'll start with our taillights. Next, we're gonna do our left turn signal. And we'll do our brake lights. And then finally, our right turn signal. With everything tested and working properly, we can go ahead, we can slide our boot on here. And a lot of times I'll actually make sure that we have a little bit of silicone in these little connections here and that's just gonna kind of protect it over time. And then our boot is gonna keep water from getting in here. And what I do is I just go back with a little electrical tape, wrap this around and around here. That way, it's nice and sealed up. From there, I'm just gonna take our self-tapping screws and mount it into here. And that was a look and installation of the Roadmaster diode wiring kit for a 2017 Jeep Wrangler Unlimited..


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