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Roadmaster Tow Bar Wiring Kit Installation - 2018 Chevrolet Equinox

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How to Install the Roadmaster Tow Bar Wiring Kit on a 2018 Chevrolet Equinox


Today on our 2018 Chevrolet Equinox, we're going to take a look at and show you how to install the Roadmaster Universal Hy-Power Diode Wiring Kit, part number RM-154.This is what our diode kit is going to look like when we get. We're going to get a little bit of wire loom, zip ties. This is going to be the tether that goes between your vehicle and your RV. You're going to get your diodes, and you're going to get 30 foot of wire.Let's start with your 30 foot of wire. If your RV does not have a 7-pull plug or current wiring, what you're going to do is, you're going to take about 3 foot of this, you're going to cut it off and this section that you cut off is going to be wired into your RV. That's where the tether comes in.

The other part of this is going to be attached to your towed vehicle or your Equinox. Your tether, if you tie this into your RV, this is going to be your wiring to go between your RV and your vehicle while it's being flat towed. If your RV currently has wiring, most new RVs do, they have 7-pull plugs, this, you're not going to use. What you're going to do, just cut this off. You're just going to cut one end off.

The other end is going to be at the front of your towed vehicle or Equinox.Let's talk about our diodes a little bit. These are going to be connected into your wiring through your factory wiring on your car. What these are going to do, these are going to protect your factory wiring from any feedback from your RV if there is a wiring issue. Our diodes are going to be .. They're going to have an aluminum casing that are going to protect them from any corrosion.

It's also going to have some butt connectors. The butt connectors in here, because this wiring is going to be outside the vehicle, I would recommend upgrading it to a heat shrink butt connector so it protects the connections really well. You're also going to have a ring terminal in your kit. This is going to be for your ground wire. The ground wire can be mounted anywhere on the vehicle as long as it is metal.The first thing we need to do to start our installation, we're going to take a 15 millimeter Torx bit.

We're going to have six screws along the top of our grill we need to remove. Next, we're going to take that same T-15 Torx bit, we're going to have five screws on the inside of our wheel well on the front side of our tire. This is going to be on each side of the vehicle. Go ahead and remove those. Next, we're going to take a 7 millimeter socket, we're going to pull our wheel well liner out and push it back like this, and then you're going to get a 7 millimeter bolt right here that connects your front fascia to your fender. Go ahead and remove that.Next, we're going to take a 7 millimeter socket . There are some bolts that run across the bottom of our fascia. We're going to have one right on the back side of this splash guard. We'll have another one here. We're just going to work our way across, and we're going to have one here on this side, just like that.Now the next set of hands, we're going to remove our fascia. We're going to start at the top. We're just going to lift up. You may have some little tabs. You want to make sure you pull that grill over the top of those. We're going to come to the very outside where our fender meets our front fascia, and we're going to start slightly pulling out, like that. You just want to make sure if you have any fog lights or sensors or anything, you unhook those as you're pulling your fascia off. This cord here is going to be for our fog lights. Pull this red tab down and then you're going push right there on that black tab there, and separate them like that. We'll set our fascia aside to be reinstalled later on.At this point, if you don't have your base plate installed, now is a good time to put that in. The way I ran it is, we went ahead and cut the 4-pull plug off of this end. I just took one of the zip ties, zip tied it right to the two pegs, or two pins, coming out from my base plate, ran it across the back of it, zip tied it just to hold it in place. Then I went up behind my bumper beam up to the top. Now the reason I did that is, if you are installing the inaudible 00:04:24 braking system, there's three of the wires coming off of it that are going to have to tie into this wiring, to our diode wiring.So I ran it up so I have plenty of room to tie into it. Came back down and went underneath the frame here. You want to make sure you're staying away from anything that hot or moving. I found these hard lines. See, I zip tied it here. Took a 10 millimeter socket, took these plastic screws off that run along the edge of this plastic piece, popped down this edge, shoved my wire in behind the bolt and then put these back in. So that wire is running all the way down inside of here, where it comes out the back side. I went up along my frame rail, went over the top of this hard line, over the top of my rear axle. I went ahead, right here on the top side of my spring housing, or the side of my spring housing, I went ahead and zip tied it right there. Went over the top of the axle here, pulled it tight, and I actually took the ring terminal and used my frame rail here and put my ground in.I took my four wires, split them. The green wire I left hanging. The yellow and brown wire I fed up behind my bumper fascia. Now before I did that, I had to take out the light from my wiring up, my tail light housing, I dropped my brown wire down that I tied in, and ran my green wire and my brown wire together. Again, my brown wire is going to be the extension that's going over to the other side to give me my running light signal. Went over the top of my bumper beam, which is up in here, staying away from my exhaust. Came out right over here, my brown and green wire right there is running up the same way I did on my driver's side, right up behind my fascia. Now, how I got it up and down, I just used a piece of string and a nut or a bolt.Flat head screwdriver. Pop off the caps. T-15 Torx bit, remove the two screws. I'm going to slide the light straight back like that. To get our lights to function properly while our vehicle is being flat towed, we're going to have to use a resistor. The reason we have to use a resistor is because we have two bulbs in there. We're going to have a small one right over here in this corner. We're going to have a bigger one back here. The reason we need the resistor is because this bulb here is getting 6 volts for your running lights. This big bulb is getting 6 volts for your running lights. But this big bulb is also being used for the brake light and turn signal. When it's being used for the brake light and turn signal, it's actually getting 12 volts.So what we need to do is, we need to use a resistor because we're going to use this big bulb for all three functions. If we tied our running light signal coming from the RV into this bulb here, which was only 6 volts, the light would be so dim that it wouldn't reflect down here on the back. It would only go out the side. Again, we're going to use this big bulb here. We're going to use a resistor. We're going to tie all three functions into that one light.This is what our resistor is going to look like. For the incandescent bulb, you need a 10 watt, 5 ohm resistor. Here are two bulbs that go into our tail light housing. This small bulb here is the bulb that is only getting 6 volts. This is our bigger bulb that is doing, under normal functions is getting 6 volts and 12 volts when the brake lights and turn signal is turned on, but only 6 volts when the running lights are turned on. So when the running lights are on, both these lights are coming on. What we're going to do, or what we did is we tied all of our functions into this one and put in the resistor. This one is not going to be used at all.How we did that is, we have our running light wire and we have our turn signal wire. The running light wire, when you cut it to length, you're going to use this other half, which is going to be a jumper to go over to the other side, you're going to attach your resistor. Off the resistor, you're going to put a spade connector. It can be one of the ones that comes on your diode kit. And you're going to attach it to a diode. Your turn signal is going to run right next to it on the diode. Coming out, you're going to make a jump wire. You're going to put a spade connector on each end. You're going to go from the out on the top diode, or the first diode, to the in on the second diode. Then you're going to take your signal wire, factory signal wire coming from your vehicle, and you're going to put it right next to that jump wire. You're going to take the wire, that signal wire that you just cut off, spade connector, you're going to put it to the out that's outgoing towards the bulb. That bulb is going to give you all functions, running lights, brake lights, and turn signal.So here on our passenger side, green wire is going to be our turn signal. It's going into our first diode. We have our white wire, which is my extension for my jumper wire for my running light signal coming from my driver's side. Resistor goes into the other side of the diode next to my green wire. Jumper coming off of that diode. We took our light signal, or our factory wire, we hooked it into our second diode. And then our jump wire will hook right into the second diode like that. That will give us all three functions into our large bulb. The green wire is going to be our right turn signal. Our brown wire that we doubled up over on the driver's side to make the jumper, it wouldn't reach all the way over to our passenger side, so I added a little bit of extra white wire so I can make it over here.So our running light signal, resistor. We're going to put on our diode. We're going to add our green wire for our turn signal right next to it. From this diode, we're going to make a jumper, which is just an extra piece of wire. It doesn't matter what color it is. Connect it into the single side out of that first diode. You're going to have your second diode. Connect it into the inside of that diode. Then your factory wire, you're going to put right next to it. And your out, single side is going out to the bulb. That's going to give you all three functions on that one bulb.Now that we're hooked up to our RV, we're going to go ahead and test out our light functions. Running lights, left turn, right turn, brake lights, brake lights with turn signals. That'll do it for a look at installation on a Roadmaster Universal Hy-Power Diode Wiring Kit, part RM-154, on our 2018 Chevrolet Equinox.


Questions and Comments about this Video

Bob S.

I made up a schematic from your description. I do not understand how when the brakes are on ( signal going thru one diode to the large bulb) the turn signal causes the bulb to go dim. If the brakes are on, the Bub will receive full power regardless of the turn signal.

Etrailer Expert
Reply from Jon G.

With this setup the brake and turn functions are combined in one wire. So left turn/brake is connected to the yellow wire while the right turn/brake is connected to the green wire.

James I.

If I needed a 10w 5ohm resistor why wasn't it included in the kit, they are inexpensive items.

Etrailer Expert
Reply from Jon G.

This is a universal wiring kit that fits many different applications and not all of them require the use of a resistor. In fact, I would say the vast majority of them don't need the resistor which is why it isn't included with the kit.

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