Roadmaster Tail Light Wiring Kit Installation - 2008 Nissan Frontier

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How to Install the Roadmaster Tail Light Wiring Kit on a 2008 Nissan Frontier


Today, on this 2008 Nissan Frontier, we're going to show you part number RM-155. This is the Roadmaster tail light wiring kit with bulbs. First off, you get the main wire harness that gets ran from the back of the vehicle all the way up towards the front. Your bulb and sockets right here that get installed into the tail lights, a length of loom material to help protect the wires or hide the colors of the wires when they're exposed to the outside. Some butt connectors to make your wire connections. Also, a ring terminal here for your ground.

This also comes with a little cord that goes between your car and your RV if it uses a 4-pole flat and some zip ties as well. Okay Now chances are, you'll probably need some more zip ties than it comes with the kit. Now, we'll go ahead and show you how we install it. All right, our first step is to go ahead and lower our tail gate and remove tail lights. We'll start off on the driver's side. We'll need a 10 mm socket to remove these 2 screws.

Okay, now, there's a couple of snaps in the back here that we can pull straight back and pop them loose. Now, we'll go ahead and disconnect the wiring. What I'm going to do is actually take out the whole bulb and socket itself. Set this to the side for now. Repeat the same process over on the passenger's side.

This is our bulb and sockets we get installed right here. We're going to drill out a hole using a 1-inch hole saw, and we'll install the socket and put it into place. First off, I'm going to drill a 1/4-inch pilot hole. We'll follow that up with the 1-inch hole saw. Make sure you get out as much of the debris as possible. We'll go ahead and take a small screwdriver and pry out these little tabs right here.

Not too much, but just enough to bend them up a little bit. We'll go all the way around. We'll bring our light back into place. Go ahead and take our bulb and socket; push it in. It's going to be a snug fit. Then we'll push in the socket. You may have to adjust some of the tabs a little bit, but you do want a little bit of a tight fit. Then we'll go around the openings with some silicone sealant to help protect it. All right, now, the sealant we're using is part number LT37467. We'll let that sit for now, and repeat the same process over on our other tail light. Now, let's go ahead and get our wire harness ready to go. In this case, we have two 4-pole ends. We only need one, so we're just going to cut off one end. We're going to start off on our passenger's side. We'll only need 3 wires. In this case, we won't need the yellow wire. That's for left turn signal, so we're just going to cut that one short. Now, we'll just go ahead and start hooking up our wires to our light here. Peel my wires back quite a bit because I actually need a little bit extra length of white wire for our ground. We won't need these two wires, so put those out of the way, but we'll need our white wire. Now, our white wire is going to go for ground, so I'm going to strip these 2 wires back, and I'll put them together using a single butt connector. Now, with the other end of this wire here, we're going to add the ring terminal. All right, let's go ahead and hook up our wires to the bulb and socket we previously installed. Our white wire's going to go to ground, of course, which will be black on the bulb and socket. Since I'm using a larger butt connector, I'll go ahead and fold it over, give it a little more to grip on. We'll attach it. Now, our brown wire's going to be a running light circuit, so we'll end up using a smaller butt connector, one of the blue ones, to connect these two together, so we're going brown-to-brown. All right, next up will be our green wire for our turn signal and brakes. That'll go to the red wire. To recap, we have our white wire going to ground, which is black on the bulb and socket. Brown-to-brown; green-to-red. At this point, we can go ahead and take our 4-pole end . We're going to drop that down behind in the pocket where the tail light goes and run this down to the ground for now. Let's take a moment to wrap up some of our connections with some electrical tape to help give them a little added protection. Now, we'll go ahead and take our white wire with the ring terminal and ground it to the bed. Now, I'm using a self-tapping screw that does not come with the kit. Let's take a moment to reinstall our light bulbs into the housing. Put it all back into place. We can go ahead and reinstall the screws. Okay, now we're going to move underneath the truck now, and we're going to take our 4-pole wire harness and route it over to the other tail light. I'm just going to follow up over the frame here and just follow some existing wiring going across. We'll zip tie wherever it's convenient. We'll also go ahead and take a length of wire, and we'll run this back up to our tail light on the other side. We'll bring up our wire harness. We'll go ahead and tie it off to keep it from falling back down. Make sure you have enough wire pulled up, and we'll go ahead and route it out to our tail light. Once again, we're only going to need 3 of 4. This time, we won't need the green one, but we're not going to cut it. Let's go ahead and work with our white wire first. Again, I'm going to cut this in half and connect it to our black wire. For our brown wire, we need to do the same thing, so our power signal will come in from the RV through here to power this light, as well as the light on the other side. Now, our yellow wire, we'll go ahead and cut that one in half. Make sure you know which end of the wire harness goes toward the front or towards the RV. We'll connect these two together using the small butt connector. All right, we'll go ahead, to recap, we've go our white wire for ground from the RV will go into this wire for ground, double back out to the other side for ground as well. Same thing. Now, running light circuit, brown goes into this butt connector. It goes back down to the other side as well and powers this light. Our yellow wire, for left turn signal and brake will go to our red wire. Okay, we'll go ahead and bundle these guys up, and we can go ahead and put our tail light back into place. Next, we'll go ahead and run our 4-pole wire up to the front. When we do that, we will make sure we stay away from anything moving like suspension components or anything hot like the exhaust. Basically, we just followed our wire harness along the frame, going over top . It's kind of hard to work around here, so we went around the body mount on this side. Then we stayed on top of a frame from there on out. Stayed as far away as we can from our exhaust, and we zip tied to the line up here to help hold it up and out of the way. Now, if we actually push it far enough up in the engine compartment, we can actually reach in and pull it up. Once we're in the engine compartment, we'll go ahead and route it, once again, staying away from anything moving components or anything hot. In this case, we're going to run up underneath the steering shaft, come out underneath the brake lines right here and the reservoir, work our way underneath the air box, and we'll go ahead and route this back down towards the front of our truck by the license plate on the driver's side. Down towards the bottom, there's an opening. You can also sometimes reach through the top and grab it as well. To help hide the color of the wires, let's go ahead and use some loom material. We'll go ahead and attach it to a pre-existing bracket on the vehicle. At this point, we can go ahead and try it out. Typically, you go up to the back of your RV and plug it in. Don't hook up a tow bar or anything like that. We want to verify the ground from the RV is being transmitted through the wire harness and, of course, the rest of the signals. We're using a separate power supply here, and we'll go ahead and try it out. First, we take a look at the running light circuit. Then right turn, and now left turn. Now, we have turn signals. We also know that's the same thing as our brake signals, so we know that's good as well. With that, that'll finish it for our install of the Roadmaster Tail Light Wiring Kit with bulbs, part number RM-155 on our 2008 Nissan Frontier.

Info for this part was:

Test Fit:
Joe V
Video Edited:
Zack K
Video by:
Andrew K
Video Edited:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Video by:
Andrew L
Video Edited:
Dustin K
Installed by:
Cole B
Test Fit:
Shane T
Video by:
Alan C
Test Fit:
Randy B
Video Edited:
Chris R
Test Fit:
Jared G
Video by:
Zach D
Test Fit:
Andrew S
Test Fit:
Brent H
Test Fit:
Robert C

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