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Roadmaster Tail Light Wiring Kit Installation - 2015 Chevrolet Sonic

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How to Install the Roadmaster Tail Light Wiring Kit on a 2015 Chevrolet Sonic


Hey everybody, Ryan here at etrailer. Today on our 2015 Chevrolet Sonic, we're gonna be taking a look at and showing you how to install the Roadmaster Bulb and Socket wiring kit for towed vehicles. So you're gonna have a total of five main components needed to flat tow your Sonic down the road. First one's gonna be your base plate. And that's gonna provide us with a solid and reliable connection point. That way we can hook up our tow bar to.

That's gonna be the second component. That's gonna be that physical link that connects the front of your Sonic to the back of your motor home. The third main component is going to be safety cables. And these are gonna be there in the event of an unlikely disconnect. They're gonna keep everything together.

Fourth main component is going to be your tow bar wiring. And this is going to transfer the lighting functions in the back of your motor home to the back of your Chevy. Keeping you safe and legal. And last but not least, we have a braking system. That's the fifth component.

What that's gonna do is apply the brakes in your Sonic, whenever you apply the brakes in your motor home That's just gonna help bring you to a more predictable and safe stop. So this is a perfect example on how our wiring kit is actually going to work. So you can see we have the left turn signal going on our motor home. And it is transferring that signal here to the back of our Sonic. It's gonna work the same way for our right turn, our brake lights as well as our taillights.

So we got all of our bases covered there. And one thing that I really like about the LED kit like we have here today, is these things are bright. I mean, even in the daytime, nobody's gonna miss these. So really nice there. You're not gonna have to worry about some, you know really dim bulbs that people can hardly see. Especially when it really matters, you know at nighttime or in the rain, stuff like that. Well, what's cool about the bulb and socket kit is that once you have it installed, all right, it's gonna be done. It's gonna be super straightforward to hook up whenever you're ready to flat tow. More or less you're just gonna have to plug it in to the front of your Chevy and into the back of your motor home. And that's not the case with some of the other kits like the magnetic lighting, for example. That would require you to take your lights from on top of your vehicle every time you wanna flat tow, and then drape wires all the way to the front and get them hooked up to the back of your motor home. That's just kind of a pain. It takes some time to set up. And then you're worried about, you know, your car getting scratched up and things like that. Not to mention whenever you're done with them, you're gonna have to take them off again and find a spot to store all that wiring and everything else. And when you're over the road, and a motor home storage is really important. So don't waste a bunch of space and go with the bulb and socket. And it's something you're not gonna have to worry about. One of the things that I do like about the bulb and socket kit is the fact that it's completely isolated from your vehicle. So what I mean by that is it has its own wiring and you're not tapping into your Chevy's factory wiring or anything like that. So you're not gonna have to worry about, you know jeopardizing electric systems in your Sonic. The one thing I really wasn't too crazy about until I actually did it, it kind of put my concerns at rest, was the thought of having to drill a small hole in the taillight itself. That way we could get our bulb and socket in there. Well, once I did it, it actually turned out really nice. That socket fits in the housing nice and tight. And after I put some sealer around it, it's not going anywhere. So it really turned out good. And honestly, it sounds scarier than what it really is. So I said it's really easy to use. All you're gonna have to do is take your wiring here and plug it into your six way connector here at the front of your Sonic. That's really all there is to it. The other end of the connector would get plugged into the back of the motor home. Now I do want to mention something with this kit and this is really gonna depend on what you have. So with this particular kit, it comes with this hybrid coil cable. And this is something you would typically use with a tow bar. That's set up a little bit different than this one here. This is one you would use typically when your tow bar has channels in it. That way you could route the cable through the channels. This one will work fine, but it's not, there's better choices. Okay This kit, as well as the one that does not come with a cable, also doesn't include a six way round connector. So unless you picked up a tow bar that has this included or already have one, this is something, connector here that you're gonna have to pick up separately. So to give you an example, say if you had a tow bar that did not have channels in it, what I would recommend doing is getting the kit that does not come with the cable and then picking up a coiled cable. And that usually comes with your connector as well as a cable. If your tow bar does have channels in it, you could use this kit. And you just need to pick up that connector separately. Or you could also use the kit that does not come with a cable. And you can pick up just a straight cable separately. And that would usually come with the connectors. And also just want to give you a few different options and really just try to give you a solution that'll work best for your particular application. So let's begin our installation. We're gonna be here at the front of our Chevy. And we have our fascia removed. Cause we're doing this at the same time. We did our base plate. This doesn't have to be removed to get this done, I just wanted to mention it in case you're wondering. With that being said, we need to route our bundle of wiring. Okay, so one end of our wire I just have it loosely hanging here next to our bracket for our connector plug. Give yourself about a foot extra to work with and start routing. So what I did was just kind of follow it along through here. Through this area. So here's where it comes kinda up and behind her headlight along this edge here and where it kind of comes closer to the center of the vehicle and straight down our firewall to the bottom side of our car. So here's where our wiring drops down now underneath the vehicle along our firewall. Where it comes through here, zip tied it along this bracket. Then I just kind of shot over to our frame rail. And I did this to avoid our hot exhaust. We want to avoid that hot exhaust as well as any moving components when you're doing this. Just pushed our wiring up into the hole and continued just to route it back. See I secured it there. It comes out there. It's up and over. And really don't have on this side a straight shot to go towards the back. So what I did was just cut it over towards the passenger side of our vehicle. See it there. Started it up and over our axle, and all the way to the back here. When I got to the back, what I did is just separate the wires. So we have four individual strands. Just gonna kind of let this hang, hang out for now. I can open up our hatch and get our taillights unplugged and removed. So there'll be two Phillips head screws here. We'll pop them out. Just grab your taillight. Kind of work it side to side and carefully pull towards you. It'll release these alignment pins. But now we're just going to separate it from our wiring. So these are all quarter turn bulbs. So you can just grab it, rotate about a quarter turn, and pop it out. Get this one removed as well. We can set our light to the side and repeat the same process to get our passenger side one removed. Now over here on the passenger side, we need to get our wiring up into the taillight pocket. So I just use a piece of tubing as a pull wire. You can use like a coat hanger or something as well. So just stick it through the opening here, comes out the bottom. And what I've done is taped on my white brown and green wire. And I use two additional pieces of wire as well. I got a black one and a white one. And we're gonna use these as jumper wires. So I taped those to, those to it as well. And now what we can do is just kind of grab our wire and feed the wiring up and to our taillight pocket. So now what we can do is grab our taillight, and we need to create a hole in it that way we can put in our bulb and socket. So if you flip it on the back, I'm gonna go in this area right here, you want to make sure you have enough clearance for the bulb that's gonna originally go back in there. And for our new bulb to go in as well. So we go right here in this area. I'm gonna be using a hole saw to get this done. What I actually found with these hole saws in plastic, is if you kind of start it with the bit turning to the right, and then actually put it in reverse and finish it out that way. It kind of just makes for a cleaner cut and is less prone to crack, at least in my experience. So I will kind of pick our spot here. And drill out our opening. Now we can grab our bulb and socket. And what I like to do before we actually put it in the tail light is stripper wires back first. That way they're done. We don't have to worry about it later. Just do that. And then what we're going to need to do is you could see these little teeth on here. If you try to just take this, and put it in the tail light it's too loose. Okay, it'll flop around and fall out. So what we need to do is kind of pry these open a little bit. So I just got a pick here. You can just use pretty much any tool you got laying around to do this. Pretty easy. Just kind of go around each one and open them up a little bit. That way, when we push this in we want some tension. And you want it to get a good hold on the tail light. So we'll try it out. That felt about spot on. You felt some tension, took a little bit of force to get in there. It's not moving around at all. And it's very solid. So what I went ahead and did was use some silicone. You can find this here at etrailer. And I sealed up around our bulb and socket there really well. I don't want any moisture. Anything like that entering inside. So I just blobbed it up around there. We're going to repeat the same process for the other taillight. We'll then set both the taillights aside and let them dry, while we're working on finishing everything else out. So I figured we can go ahead and come up here to the front. Wire up our connector plug while we wait for our RTV silicone to dry on the taillight. So what I'm going to do, one end of our wiring here I'm gonna take the rubber boot. Slide that over. What I'm gonna do is split the wires, maybe a few inches. Peel them back and then we can strip the ends. So the insulation off. That way the wires can actually get hooked into our connector plug. Get that removed. And with these wires, I do like to give them a solid twist there. That way it keeps them nice and tight and helps make a good connection. So kind of just let those hang for now. If we look at our connector plug, on the back here we're going to have several terminals six of them to be exact. And we're going to be using four. The way these are gonna work is you're gonna have a set screw in there. And so you take a small Philips and kind of back that screw out. Not completely, but almost all the way. And so the terminals that we are gonna be using will be this one, it's labeled T M for tail lights. Our brown wire will go there. This one's labeled GD for grounds. Our white wire will go to it. This one's labeled LT for left turn, so our yellow wire will go to that one. And this one here is labeled RT for right turn, so our green wire will go there. So I'll get these set screws backed out. Then we can start to hook up our wires. We'll show you how to do. So we'll start with TN, our taillight wire, which is the brown one. That's simply just gonna plug right in. You can hold that wire in there and then just snug down that set screw. So it's really straightforward. Make sure it's tight. So we got a good connection. I'm just gonna repeat that same process for our three remaining wires here. So this is the way your connector plug's gonna look once you have all your wires hooked up. And what you can do now is put the cap over it. Once I verify everything works, what I like to do is tape this up and put some dielectric grease on the terminals there. It just really helps seal everything. But if you have an issue, I don't want to have to deal with all that grease. So we'll just do this for the time being. And once we verify it works then we can do that. I'm gonna go ahead and just mount it up for now. That way it's secure. Tighten the screws. Put them in and snug them down. Now we can do is actually get our lights hooked up here. So our brown and our black wire, I'm going to take one of the included yellow butt connectors, and crimp it on. Just a little bit easier to have these connectors on the taillight side. As opposed to trying to, you know hold it up and connect them from the other end. The black wire we're gonna take a yellow one as well, crimp it on, and the red wire we're gonna be using one of these smaller blue butt connectors there. So we're working on the passenger side by the way. And what I did was strip our wires back that we pulled up here. The brown wire and the extra black wire that I ran up here. I twisted those two ends together. Same thing for the white wire and the extra white wire that I ran up. Green wires just on its own. But we're gonna get these connected. I'm just gonna kind of shorten that up a little bit. So the green wires could go to the red wire from our bulb and socket. That simply just plugs in. It crimps down. The brown wire from our bulb and socket is gonna go to our brown and extra black wire. That goes the same way. And last but not least over here, the black wire from our bulb and socket it's gonna get connected to the white wires. The same way. Some of that done. Now we can take all of our factory lights and get these plugged back on in. Opposite way. Get them lined up. Kind of feel them drop down and then rotate them that quarter turn to lock them in place. And once this is all done, we can simply re-install the light. The opposite way that we removed it. So now underneath the vehicle I went ahead and routed our black, yellow, and white wire over towards the driver's side of our vehicle. So I just followed it up along the back side of our bumper. It's a little tricky to see but it goes straight up into our tail light pocket. And I did that the same way we did the other side. Just dropped down a pull wire and set it up into position. All right, so over here went ahead and hooked up our wiring to our bulb and socket pretty much the same way. The extra black wire that we ran, gets connected to the brown wire from our bulb and socket. Red bulb and socket wire gets connected to the yellow wire, and the black bulb and socket wire gets connected to the white wire. Now this one I use a white, or I'm sorry, a yellow butt connector. And I grabbed maybe about a two foot piece of white wire here. And we're gonna ground this end. All right, so strip back the insulation, gonna take the included ring terminal. Crimp that on. And we want to go to a clean solid piece of metal on the body of our vehicle. I'm just going to do it right there. So I'll take the included self-tapping screw, get it where I want, and run it into place. Now once that is done, you can take the taillight, re-install your bulbs, and put it back into place. So I went ahead and plugged in to a test box. That way we can check it. You can use your motor home, but keep in mind if you have an electrical issue on the motor home side, that's going to translate to issues on this side. So to avoid that you can use the tester box. That being said, try our taillights. Our left turn. our right turn, And our brakes. And that'll finish up our look at and our installation of the Roadmaster Bulb and Socket wiring kit for towed vehicles on our 2015 Chevy Sonic..


Info for this part was:

Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video by:
Dustin K
Employee Ryan G
Test Fit:
Ryan G
Employee Bradley B
Test Fit:
Bradley B

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