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Roadmaster Diode 7 to 6 Wire Coil Kit Installation - 2019 Ram 1500

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How to Install the Roadmaster Diode 7 to 6 Wire Coil Kit on a 2019 Ram 1500


Today, on this 2019 Ram 1500, we're going to review and install the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil wiring kit, part number RM-15267. Now, this kit will give you all the basic functions needed to tow your Ram behind your motorhome. It'll cover your running light circuit, your left turn and right turn signal, and your brake signal. On our Ram here, we actually had a piece of plastic behind the grille right here we could use to attach our 6-pole connector to.We have our 6-pole here, it's only using four of our circuits, but you can always take it apart and add an extra upgraded circuit like a battery charge circuit, or some other indicator light circuit as well for your braking system. It also comes with the hardware to attach it, and also a metal bracket. In this case on the install it wasn't used, but it does come with it.

This is a Flexo-Coil part, 7-pole connector you'll find on a lot of motorhomes and RVs, and your 6-pole connector, which will plug into this side of the truck.Now our kit comes with four diodes. You'll need two for each side, one for your turn signals, and you'll need two, one for each side for your running light circuit. Now this is a great addition to your towing situation, compared to say for instance, magnetic lights. If you've got a nice truck like this one here, you probably don't want magnets possibly sliding around, or even trying to find a spot to attach it to. With this setup, it's permanent.

All you gotta do is just plug it into the front and you're good to go. Now the kit does come with the wire to run from both taillights, and up to the front of our vehicle.Next we'll go ahead and show you how to install it. First part of our install is we have to have access to the taillights, so we're gonna lower our tailgate down and remove one of the taillights. We're gonna start off on the passenger side. To take off our taillight, this cable is in front of one of the fasteners here, so we have to remove the cable.

So we'll lift up on the taillight just a bit. Take up some slack. Pull that edge back inaudible 00:01:48, that's why we're gonna do one side at a time.Four inaudible 00:01:52 to remove, two screws, and two plastic ones. Work the center of the plastic rivet out first, just a little bit. You can do it with a screwdriver.

But if you got a trim panel tool, that works the best. Pull the whole assembly out. For these fasteners, we'll need a 1/8" hex key. Another trim panel tool, wider the better, to get behind the lens here, kind of work it loose. Pop it away. Then we'll remove our electrical. To do that, we have to push back on this red tab, and then push down here, to be able to pull the connector apart from the light. We'll set the light aside. I'm gonna unravel the tape from the wire so we have easier access to the ones that we need to install our diodes into.We've tested our wires. We'll show what we came up with. The white wire with the orange stripe, we found that was gonna be our running light circuit, so we need that one. Then we also found that the white wire with the green stripe is our brake signal. If you look at the back of the connector, they're right next to each other, so it's kind of convenient. Let's work on our wire for the brake signal first. We're simply gonna cut it in half. We're gonna strip the wire back. Twist the wires, and we'll install our terminals that will go to our diodes. Now I do like to pretreat these terminals with some dielectric grease, since it does sit outside somewhat. Just a little shot inside there where you installed the wire. Also a good thing is maybe some on our terminals here, especially put some between the two terminals here, or silicon, because you can eventually get corrosion between these two tabs.Get yourself a good pair of crimpers. Slide the wire in and crimp it down, one on each wire. The end with the one tab always goes towards the taillight, so make sure you get it properly installed. Then we take this wire, and put it back into one of these two tabs here. It doesn't matter which one. Push it in. Sometimes you'll actually hear it click, which is nice. So our circuit is back to stock here. We'll go ahead and do the same thing with this wire here for our running light circuit.With both diodes installed, we'll take our long ribbon wire here with the four wires. We'll take this, and we're just gonna run it through the bodywork, and down to the ground for now. I'm gonna take a moment to split my wires back, and get them ready to install. For this side, we're only gonna use these three color wires; white for our ground, brown for our running light circuit, and green for right our right turn and brake signal. We don't need this yellow one. We're just going to cut it off and out of the way, and not worry about it. Go and strip the rest if the wire back. For our green and brown wires, we'll put two more terminals on there.Let's hook up to our diodes. The brown wire to our running light circuit. Our green wire going to the brake signal on our truck. Now our white wire needs to carry the ground from our motorhome to the car or vehicle ground, so we'll take our white wire, strip it back. I'm gonna add a ring terminal to it, and I'll attach it to the bodywork of the truck. We'll make a ground using the provided screw. It's a self tapper. You'll need a 5/16th nut driver to install it.I'm just gonna zip-tie these guys together so they don't rattle around too much. Then in turn, I'll zip-tie it to the wire harness. At this point, I can point my taillight back together. Push in until it clicks. Push the red lock button back in, and reinstall. Let's take our plastic fasteners and push them back into place. Don't forget our metal fasteners. Don't forget to put your cable back up on this side inaudible 00:06:14 take it off on the other side.Now I'm gonna remove the driver side taillight, get it out of my way, and then run my wires back up to this taillight. Now when we run across, and also up to the front of the vehicle, we want to stay away from the exhaust, as far away as possible, and of course away from sharp edges. So I'm just gonna run it across behind the bumper, zip-tie along the way, and go back up to my other taillight. To run it across, basically I followed the factory wire harness, coming all the way across, and zip-tying in places that we're convenient, and that could hold up the wire just fine. As I got to the other side, I put some of the supplied loom material around it, going around a sharp corner right here, 'cause sometimes this can bounce around and wear on these metal edges.On our driver side, we identified our wire. This all white wire inaudible 00:06:58 appears to be a light gray stripe is gonna be our running light circuit. This all white wire here is going to be our brake signal. They're right next to each other at the back of the connector too, just like the other side. I'm gonna install my diodes, just like I did before. Then we'll hookup our wires.All right, I'm gonna split back my wires, so I get easier access to them. Be careful and cut down the middle. We'll split our wires back. We're gonna work with one wire at a time. This time, we won't need our green wire. We won't cut it. We're just gonna leave it alone, just like that, 'cause it needs to run up to the front of the vehicle. But we'll need our yellow wire this time. That's gonna be our left turn and brake signal, so I'm gonna cut one short right here, and I'll add a terminal to it. Make sure the long end is the end that goes towards the front of the vehicle. Then we'll put a terminal on here. That's going right to our turn signal diode. Our running light circuit will go to this terminal here. However, we're gonna do one thing different, 'cause this needs to connect to both diodes and up front. So I'm gonna cut this wire in half here, and add a special terminal to it. This basically will work like a junction. Strip them back, and we'll combine them once again this way, so they're side by side. Our special yellow terminal. This will go to our running light diode.At this point, I can secure my wires and reinstall my taillight. I got my wire ran back underneath the vehicle, and we'll continue this going up to the front. I'll show you how I routed my wire going up to the engine compartment. You can see how it comes down right here along the bodywork on the inside. I ran it up, over the frame on this side, around this mount here, where it comes out toward the middle inaudible 00:08:55 back around. Basically it went around the inaudible 00:08:59 suspension here. After the shock, I came back out on this side of the frame, ran through where I could, added some loom where I thought it was necessary, and continued up front, following the factory wire harness. Zip-tying where it was convenient, going all the way up. This body mount right here, went behind it, and for now I'll just come right down.Now at this point, I'm pretty much getting short on wire, which happens occasionally, so I just added some more wire to it, to lengthen it up to go to the front of the truck. Now I used some heat shrink butt connectors to make my connects, so I don't have to worry about them underneath the vehicle. So I'm gonna continue running this up into the engine compartment. Now I'm gonna try to run a loop up towards the top, and then back down, so when you add a braking system that requires access to these wires, it makes it a little bit easier in the future.I brought my wire up, made sure it stayed away from the steering components and the exhaust. It's not too hard on this truck. Come up by the battery cable for our negative side. Then I got my excess right here, just sitting here for now. It'll be just fine, in case we ever need access to it again. Come through here underneath the fuse box. Right next to the radiator I went straight down to the floor. Let's leave the wire alone for now, and find a place for our 6-pole connector.What I'm gonna do is I'm gonna cut away the grill right here. There's a plastic layer behind that. Use my hole saw to put a hole through that, and I'll mount this to the plastic behind it. This whole assembly will be recess. Make sure it's even, and we're just gonna put some marks around it inaudible 00:10:30 where we need to cut out. So I'm gonna use some diagonals here to cut my plastic out, work my way around.We need a 1/4" pilot hole, and I'm gonna bring it down just a little bit below center to make sure I have room for my hinge. Then I'll come back at it with 1 3/8" hole saw. The hole is drilled out. Let's run our wire through, and we'll connect our socket to the wires. Once again, I'll split my wires back up. We'll strip them and get them ready to install. This is the back of our 6-pole connector. We'll push that on the wires first, before I put the rest of it on. Loosen up the screws that hold the wires in place.Before I do anything else, I'm gonna put some dielectric grease between these two contacts, and inside these sockets inaudible 00:11:32 screws as well. Take our ground wire, put that one in first. It's labeled GD. Yellow will go to our left turn signal. Next one will be right turn. For our running light circuit, will be ran to the one labeled TM. We'll slide these two together now, and I'm gonna cover from here to here with electrical tape. We'll push it into place. With it in place, I'm gonna use my 1/4" drill bit one more time, and we'll install the hardware that comes with this kit. Short screws, we'll go through. You probably want to have an extra hand to help hold the screw in place while you start the other one.At this point, everything is installed. We need to test it. You would be hooking up to your motorhome to make sure it all works. I'm gonna use a separate power supply in my application. Let's go ahead and try it out. We'll turn on our running light circuit. Next we'll try our left turn signal, and now our right turn signal. Then we should have our brake signal. That will finish it for the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil wiring kit, part number RM-15267 on this 2019 Ram 1500.


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