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  1. Tow Bar Wiring
  2. Roadmaster
  3. Bulb and Socket Kit
  4. Bypasses Vehicle Wiring
  5. Tail Light Mount
  6. Universal
Roadmaster Tail Light Wiring Kit with Bulbs

Roadmaster Tail Light Wiring Kit with Bulbs

Item # RM-155
Our Price: $64.84
You Save: 33%
Tow Bar Wiring

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Roadmaster Tow Bar Wiring - RM-155
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Use your towed car's signal lights without tapping into its wiring. This self-contained wiring kit bypasses your vehicle's electrical system, eliminating any concerns over violating the manufacturer's warranty. Great Prices for the best tow bar wiring from Roadmaster. Roadmaster Tail Light Wiring Kit with Bulbs part number RM-155 can be ordered online at or call 1-800-940-8924 for expert service.
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Roadmaster Tow Bar Wiring - RM-155

  • Bulb and Socket Kit
  • Bypasses Vehicle Wiring
  • Tail Light Mount
  • Universal
  • Roadmaster

Use your towed car's signal lights without tapping into its wiring. This self-contained wiring kit bypasses your vehicle's electrical system, eliminating any concerns over violating the manufacturer's warranty.


  • Lets you use your towed vehicle's brake, running and signal lights without tapping into its wiring
  • Bypasses towed car's electrical system completely - wiring is routed beneath the car
  • Works via independent plugs and sockets mounted inside the tail lights
  • Maintains manufacturer's warranty on towed car by avoiding any involvement with its electrical system
  • Overall measurement of bulb: 2-1/4"
    • Length of bulb from flange to top of bulb: 2"
  • Includes all necessary wiring, 2 lights, 2 sockets, zip-ties and instructions
  • Made in the USA
  • Limited Lifetime Warranty

Note: Towed car must have enough room inside the tail light lens housing for an extra bulb and socket.

155 RoadMaster Tail Light Wiring Kit with Bulbs

Installation Details RM-155 Installation instructions

This Product Fits The Following Vehicles

Video of Roadmaster Tail Light Wiring Kit with Bulbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Roadmaster Tail Light Wiring Kit Installation - 2021 Chevrolet Spark

Hey everyone. Shane here with Today I have a 2021 Chevrolet Spark. I'm gonna walk through how to install the Roadmaster Bulb and Socket kit. What the bulb and socket kit allows you to do is allows you to transfer your light signals from your motor home to the back of your vehicle while it's being flat-towed so that you're safe. Everybody knows what you're doing, whether that's braking, turning or driving at night.

What's different about this kit from your typical diode kit is it actually has a bulb that requires you to drill a hole into your light. And it just allows you to run 4-pole wire to the front and hook 4-pole into your RV so you're getting the proper light functions. Once it's installed, you don't have anything to do other than hook-up the umbilical cord from the front of our vehicle to our motor home. There are five main components to flat tow any vehicle, typically. You have your base plate which monster the chassis of the vehicle to give you a solid connection point for your tow bar.

You have your tow bar which gives you that connection from your base plate to your motor home, your safety cables which are a secondary safety device, your wiring which allows the vehicle to receive light functions from the motor home and a braking system. Now for this vehicle, because it's under 3000 pounds it doesn't require the braking system. So what we have installed on this vehicle is the base plate and the wiring. There is one more component for the '21 Chevy Spark that is required. And that's gonna be a battery disconnect.

Battery disconnect is by Roadmaster. You can find it here at etrailer. What that allows you to do because the key needs to stay in the ignition, so the steering wheel doesn't lock, that allows you to disconnect the battery so you don't wear it down every point in the vehicle. Another thing to consider when you're flat towing your vehicle, when you're wanting to set up your vehicle to flat tow is a distance of where your base plate sits on your vehicle and where the center of your hitch sits on your RV. What we want is you want that number to be within three inches.

So what you would do is you'd measure from the ground to the center of your hitch. Get that measurement. The measurement for our Spark to the center of where this pin goes through, where our tow bar meets our base plate is 16 1/2 inches. If the number for the center of your hitch is within that three inches high, then you're good to go. If it's over that, then you're gonna need a high-low adapter. You can find that here at etrailer. Another thing that separates this kit from a diode wiring kit is it doesn't require you to tap into or splice into the factory wiring behind the taillights. Simply install the bulb, the wire gets ran to the front of the vehicle and as I mentioned, all you do is connect your umbilical cord and it gives you your light functions at the back of your vehicle. This is gonna be our umbilical that's gonna come with your bulb and socket kit. Again, this is a connect from your RV to the front of the vehicle. This is our plug, this gives us our 4-pole plug wiring to go from here, back and connect to each one of our bulbs. Each one of our 4-pole ends is gonna come with a dust cap. So when we're not using it, we can keep any dirt and debris from getting inside the connections. As far as the installation process, it's pretty simple and straightforward. You're gonna run your wire from the front of the vehicle to the back. You're gonna split it from one light to the other, install your lights inside each one of your factory tail lights, connect the wires and you're basically ready to go. Now we've gone over some of the features. Let's walk through how to get it installed. Now you've noticed that we have our fascia off already. Ideally, what you wanna do is if you're installing your base plate which is what we just got done doing, you wanna install your wiring, braking system, any of that at the same time, so that when your fascia is off, it's gonna make it a lot easier to run everything up in the front. And then when you put your fascia back on you can trim everything on the fascia all at one time. We're gonna take one end of our wiring harness and we're gonna attach it to our base plate wherever in the area where we're gonna be installing our wiring. This base plate happens to have two prongs on it for the wiring. So I took a zip tie and just zip tied it to it. Now, if your RV does not have a 4-pole or 7-pole plug, the opposite end is gonna have a 4-pole on it. You're gonna take about three foot of it, you're gonna cut it off. This end will get wired to your RV. And then the kit comes with a tether to go from here to this end in between the two vehicles, our vehicle or our RV that this owner has already has a 7-pole plug on it. So what we're gonna do is we're not gonna be using this. We're just gonna cut it off and route this to the back of the vehicle. Let me get it done real quick and I'll show you how I did it. It really doesn't matter which side you start, passenger side or driver's side. I normally go to the driver's side. I chose to go to the passenger side because my exhaust is on this side or on my driver's side. And I really have nowhere to attach my wire going back. On the passenger side, underneath the vehicle, we have hard lines that run from the front to the back. So it makes it very easy to zip tie your wire up there. What I did, I did tie it across the top of my base plate, came to the outside because we have a bunch of hoses and stuff and belts here. We wanna make sure we're staying away from anything hot or moving. On the outside, when in between my fender well and the frame rail back to the inside of the frame rail. Right up here, that's where I came in. We have a hard line right here. Let me see where my zip tie is. I came straight across to this hard line. Zip tied it here, turn my line straight down. Right here. So I just zip tied right along the way here. Once across, I ziptied to this hard line. Ziptied it up here and then came right up here to this hard line. Ziptied it here. Next we need to get our wiring ready to go up to our taillight. And then across to our driver's side taillight. Next we're gonna separate all of our wires. Our green, brown, and white, we're gonna be taking up to our passenger side. Yellow, we are gonna run it over to the driver's side. Now you'll notice there's quite a bit of extra here for this size vehicle. We're not gonna cut it short yet because what we're gonna end up having to do is there a brown or green, or I'm sorry, a brown or white, once we get them connected to the bulb that's going in the tail light, we're gonna use the extra wire as a jumper to go over to the other side. So we're gonna need all the links we can get. And then we can cut off all of our excess later on. So now that we've got them separated, I've got my yellow wire just ran over there just so it's not hanging out all over the place. We'll go ahead and get our taillights removed and get these three ran through our passenger side. We'll go ahead and remove both of our taillights. Phillips head screwdriver, remove the two bolts here. Trim panel tool and make it a little bit easier. We're gonna go right in between the body and the edge of the light. And we're just gonna pry straight backwards. We're gonna take our three bulbs and twist. Twist them up, just like that. We'll repeat the same thing on the other side. Next, we have to get our wires up to our taillight pocket here. It's open right behind the fascia. If you have a wire hanger or anything like that can use that. What I like to do is piece of string with a nut on it. I'm just gonna drop it down so it comes out the bottom. Just like that. Take our brown, white and green wire. We can just kind of tie them on there. Pull them up. After looking at it a little bit closer, looking at the back where the fascia meets the bumper beam, I decided I'm gonna go ahead and run all four of them up here. And rather than taking my two jumper wires and running them down and over, I'm gonna take out this screw and that screw when I get to it, I'm just gonna tuck them right behind my fascia and go straight over. So what I decided to do is where my wires ran from my last hard line that I attached them to. There's a hole in this plate. I ran all four wires through it. My bumper beam, where it attaches to my frame rail is right here and I wanted to go onto the inside of it instead of the outside, 'cause if I go on the outside, I have a chance of some from my tire kicked up and damaging my wires. So being on the inside, this will keep everything up tight. Being able to go through that hole, being on the inside that the bumper beam rail, it keeps it away from anything coming from a tire. Next thing we need to do is when you get our bulbs mounted inside our taillights. This is gonna be the the actual top of our taillight. This part is gonna be the bottom of the top section, if that makes sense. This is our top bolt. We had to come in through the bottom of it, go around through these, we're gonna have to make a one inch hole. What I suggest doing is being very careful when you're drilling through the plastic. Cause if you using drill bits or anything that are not meant for plastic it could potentially crack this and you don't wanna do that. So just take your time with it. Actually, you wanna take some RTV silicone, if you don't have any, you can find some at etrailer. We're gonna put it around this outer edge, push down and replace you. We're gonna take some more. We're gonna go around the edge just to make sure we have plenty of coverage we don't get any water or moisture inside. While we let our silicone dry on one, we're gonna repeat the process on the other. Once your sealant is dry enough, it may take up to eight hours. Then we can start installing them back into, connect them to our wires and reinstalling our taillights. There's three wires. Black one is gonna be ground, brown is gonna be running light signal, red is gonna be your brake and turn signal. Before we start installing the light take the screw out from each side. As I mentioned earlier, take the strip and just pull it loose off this edge. That'll give you enough room to take that wire and tuck it back in there. I'm gonna go ahead and cut my wires down. I cut them about halfway. We do have some longer wires on the back of our bulb as well. Make sure they don't fall back down into the bumper. We're gonna hold on to our white and our brown. Green, we're not gonna need anymore. We're gonna take our white and brown that we just cut off. We're gonna take the white and brown in the vehicle. Strip back the ends. Put the white to white. I recommend using heat shrink butt connectors. These are gonna live outside and be prone to taking on a little bit of moisture. This will help protect your connection to keep them from corroding. We'll do the same thing with the browns. Strip back the green. We'll take our light and make sure you have the correct one. We're gonna strip back each of our wires. White to black. Green was our a break and turn to red. And of course brown and brown. We'll take our heat source and we'll shrink those up. This was completely up to you. I like to run some electrical tape around each one of my butt connectors once I get them shrunk on there. We're gonna go ahead and re-install all of our lights, taillight. I suggest getting your wires ran under that corner first. And let's go into set this in place. One second. We'll get the screw, this bottom quarter put back in because they're like covers that area that we can just install or reinstall the light. The difference between this side and the other side is we're only gonna have one wire that's gonna be double and that's gonna be our ground. So once you have your wires cut to size, cut another small length of white wire, put the two ends together like we did on the opposite side and on your butt connectors. And then this side we'll cut to length and then we're gonna add a ring terminal on it. It'll get grounded to the body. Other than that, these two just gonna get connected to the wires coming off the light. Now we're gonna test out our lights with an alternate power source. This is gonna simulate being hooked up to your RV. Tail lights, left turn, brake lights, right turn. Now we know everything's working correctly. We can go ahead, add any other components we're gonna be installing and then reinstall our fascia and then trim out all of our components that we have added. Once you re-install your fascia, you've got everything cut out, you're ready to go. That's gonna do it for look at and installation on the Roadmaster Bulb and Socket Light kit on a 2021 Chevrolet Spark..

Customer Satisfaction Score:

Customer Reviews

Roadmaster Tail Light Wiring Kit with Bulbs - RM-155

Average Customer Rating:  4.7 out of 5 stars   (235 Customer Reviews)

Use your towed car's signal lights without tapping into its wiring. This self-contained wiring kit bypasses your vehicle's electrical system, eliminating any concerns over violating the manufacturer's warranty.


Put this into a 2002 Jeep Liberty. Good directions. Drilled out the lower part of tail light housing and install bulb sockets into it. You may have to deburr the tail light housing a bit and manipulate the tangs on the bulb socket but is fine. I put in 1157 LED bulbs :) Good stuff!

1998 Jeep Wrangler

This product was easy to install but it took some time routing the wiring harness from the front bumper to the rear. Pick up some extra zip ties, you will need several. The lighting system is independent allowing for the use of LED bulbs. Great product.


Great customer service fast delivery and reasonable price. Been purchasing from ETrailer for years


great kit i have installed them before

2007 Mini Cooper

This time it went without a hitch. last time was another thing. hopefully moving forward its all good.


Watched video and installed with no issues. Great product! Will buy again for future vehicles.


Easy to install works great

2013 Ford Fiesta

Found this item was wired with the brake lights for the brown wires and turn/running lights for colored wires and this fact kept me from getting this done very rapidly. Once identified, went together really nicely and actually grounded to frame for higher light output. I upgraded 3 wire into 2 wire converter with "Roadmaster Brite-lite 3 to 2 Wiring Converter" and they are as bright as the lights already in the housing. Except for that wiring issue, it would have been excellent. As to performance after install, great. Customer service was nice from Roadmaster as well. Did receive a call back message from etrailer a couple days later.



Continues to work as it should! Very pleased with end product after installation by myself and continue to be happy every time I hook up since! Nice item! And customer service...Well they checked back with me a year later to see if I needed anything. How is that for the best customer service around! A

2013 Dodge Durango

I purchased a Blue Ox base plate, Air Force One braking system, and a light kit for my 2013 Durango. I could have not asked for an easier process with selecting and ordering, also the tutorials and videos were a great help in determining what was the best system for me . Everything arrived as planned and in great condition. This is not my first time using and my prior experience was equally good.

Ken G.


After using the items I reviewed, about 6,000 miles, I am more than satisfied. The towing setup is easy to hook up and unhook and the braking system is second to none. All of the installation was completed by myself and a friend, both of us have a technical background him more than me and we found the videos of the installation extremely helpful.Thank you for following up and providing excellent products as well as support services.


Had trouble with one light connector but overall was good


I like this product and would definitely buy it again. I like not having to splice into the vehicle wiring and install diodes, etc. It is a clean installation with good instructions. All I have to do to hook up the lights is raise the hood of the towed car and pull out the pigtail and hook it to the motorhome. It is powered by the motorhome and does not run down the battery in the towed car. Great product.

Gary Y.


Works great! Would definitely recommend it.

2010 Jeep JK

Great idea. After years of towing with magnetic lights now all I have to do is plug it in, and I'm done.
The kit kit comes with more parts and wire than I needed and was simple to install on my 2010 JK.

Frank S.


Thanks Patrick. It works so well I forgot I had it.


Easily installed and works great

2007 Mini Cooper

Great price and service!


I have used the brake light wiring kit on 2 other towed vehicles. It is an easy install, does not compromise the original factory wiring and works well.



Easy install, working well 1 year later.


This kit really simplifies wiring tail lights on a vehicle that will be towed. No cutting into the vehicle's wiring and adding isolation diodes. Very functional and easy to install.

Kim P.


The parts are working perfectly. Thank you.


Kit was of good quality components. I would recommend about twice a much protective wire wrap along with extra of the smaller butt connectors. Fortunitely I had what I needed on hand. I also used a larger ring terminal.

Jack M.


Works great. 2002 Jeep Wrangler tail lights have plenty of room for the extra tail light bulbs.

2007 Jeep Wrangler Unlimited

Good instructions. Everything need is included for 4flat connections. One bulb socket arrived with the ground (black) wire loose in the bag. The solder joint had failed. Resoldered but had to remove the other wires and rubber insert from the bulb socket to avoid melting. Not a shining example for Roadmaster.



no issues, working as expected


Simple install using supplied instructions a nd video.
E-Trailer is the best!

2002 Toyota Tacoma

Nice to not have to splice into vehicle wiring harness. Separate bulb assembly in existing tail light housing works great for towing our "TOAD" behind motor home.

Kevin M.


Still works great after a year of towing to many destinations.

2017 Chevrolet Sonic

A very clever idea for an easy, neat, simple installation to safely operate tail lights on a towed vehicle. We installed this kit on our 2017 Chevy Sonic and it works great.



Thanks for the follow up. Everything is working just fine, no problems, nothing but good performance.

2007 Honda CR-V

Great product, not a bad install and works great. I chose to cut off both 4 flat connectors and I installed a 4 round connector with spring cover on the front of my CRV. Looks and work out great.

W. D.


Still working fine.


I really didn't want to install a separate bulb kit but our Equinox light was not compatible with our motor home. I was also installing a trailer lighting harness for the Equinox at the same time and doing them together made a lot of sense. I found this kit to be easy to manage and that drilling into the rear light housings not nearly as difficult as I had imagined. I would share a picture of the result but fortunately there is nothing to see - everything fit right into the Equinox's rear lamp structure. I compared the original lights with those from the kit driven by the RV and found them to be a great match. I upgraded the kit bulbs to LEDs for greater longevity.

1999 Mazda Miata

I purchased this wiring kit for use in my 1999 Mazda Miata.
I did not want to cut into the OEM wiring harness, even using the diode method to safeguard the system. I felt that the fully separate wiring harness was more to my way of thinking for getting my car ready to tow.

I did not follow the included instructions that said to run the flat 4 wiring beneath the car, zip tying it along the way free of the exhaust and moving parts. I ran it through the firewall, beneath the dash, under the center console, and under the carpeting back into the trunk area. I then installed the bulb holders as instructed in my OEM Miata taillight fixtures.
I am happy to have all the wiring up and out of the way of potential road hazard damage, as well as the hot and/or moving parts beneath the car.

It works perfectly, and I am glad that I purchased this kit, and also that I decided to install it the way I felt best to do so.
It took much longer my way, but I'll never have to mess with it again.

2019 Chevrolet Equinox

I ordered a Bulb and Socket kit for my 2019 Chevy Equinox. I’m getting ready to install it this weekend. I am disappointed in a couple of things so far. The kit was clearly a return from another customer. The packaging was cut open and taped closed, and the inside bag of small parts was also cut open and stapled. I don’t know if something was defective. So that is concerning.

Also odd is that the online instructions refer to using “the self-tapping screw” for a ground, but it’s not included. Had I known, I could have ordered it with the baseplate and kit, but too late now. Why not include it?

The online instructions and video depict and give instructions for wiring the harness to the 6way plug, again, not included. This kit included some rather flimsy flat 4way plugs on the wiring harness. I will need to cut those off and order a 6 way receptacle. Again, had I known ... since shipping is included only with orders of $100, not excited to find I need small extra parts, that I now have to get elsewhere, and quickly.

So hopefully the install will go well. I like the videos.

Show More Reviews

See what our Experts say about this Roadmaster Tow Bar Wiring

  • Tow Bar Lighting Recommendations for a 2012 Honda CRV
    I checked with Roadmaster and the Bulb and Socket Set # RM-155-2 that you referenced will work on your 2012 Honda CRV. For the entire kit you would want part # RM-155 though.
    view full answer...
  • What Size Hole Is Needed For Mounting Bulb And Socket For Taillight Assembly
    To install the Roadmaster Bulb and Socket Kit, part # RM-155-2, you will need to drill a 1 inch diameter hole in the rear of your taillight assemblies. You want to make sure you have at least 2-1/2 inches of available depth, because the heat from the bulb could melt the lens if mounted too close. A hole saw is probably the best option for drilling a 1 inch hole. If the entire kit is needed, you can order part # RM-155. I have attached an installation video you can check out.
    view full answer...
  • Hole Size Required to Install Roadmaster Bulb and Socket Kit RM-155-2
    To use the Roadmaster Bulb and Socket kit you referenced, part # RM-155-2, you'll need to drill a 1 inch diameter hole in the rear of your taillight assemblies. You'll want to make sure you have at least 2-1/2 inches of available depth, because if the bulb is too close to the inside of the lens, the lens could melt. The full kit that includes the connectors and wire is part # RM-155.
    view full answer...
  • Bulb and Socket Tow Bar Wiring Kit Recommendation for a 2010 Buick Enclave
    I checked with Roadmaster and they list the Bulb and Socket kit part # RM-522 as a fit for your 2010 Buick Enclave so I would recommend it for you. You wouldn't have any heat issues as long as you install the kit properly. I attached an install video for this kit plus a couple help articles on flat towing for you to check out as well.
    view full answer...
  • Size of Hole Needed to Install Roadmaster Bulb and Socket Kit # RM-155 In Taillight Assembly
    To use the Roadmaster Bulb and Socket kit you referenced, part # RM-155-2, you'll need to drill a 1 inch diameter hole in the rear of your taillight assemblies. You'll want to make sure you have at least 2-1/2 inches of available depth, because if the bulb is too close to the inside of the lens, the lens could melt. The full kit that includes the connectors and wire is part # RM-155. I'll link you to an install video that you should find helpful.
    view full answer...
  • Will the Roadmaster Bulb and Socket Kit Fit a 2010 Honda CR-V
    I checked with Roadmaster and they do list the bulb and socket kit, # RM-155, as a fit for the 2010 and 2012 Honda CR-V. However, to be certain I recommend drilling a 1/16 inch hole in the back of the tail light housing and then using a small piece of rigid wire or something similar that will fit in the hole, push it in as far as it will go, and then measure how much of the wire goes inside the housing. This will tell you how much space there is. You will need about 2-1/4 inches of depth.
    view full answer...
  • Installing Ground Wires of Roadmaster Tail Light Bulb Kit for a Flat Towed Vehicle
    Generally, when installing # RM-155 the ground wires are combined and connected to the vehicle frame in one location. However, as long as you're using a good, clean mounting point the grounds can be connected on each side.
    view full answer...
  • Are Light Sockets in # RM-155 Available Separately From Rest of Kit
    The lights sockets you refer to are indeed available without the rest of the kit. You would need part # RM-155-2, which you can see by clicking on the provided link.
    view full answer...
  • Best Tow Bar Wiring Kit for a 2009 GMC Envoy Non-Denali
    I checked with Roadmaster and they do show that the Bulb and Socket kit, # RM-155, fits the 2009 GMC Envoy with or without electric seats and not a Denali. We also have several other kits available and I have included a link to them for you to the right. I have also included a helpful link on tow bar wiring and a helpful link on flat towing.
    view full answer...
  • Pulling Fuses to Flat Tow 2010 Ford Escape
    According to Roadmaster, only one fuse needs to be pulled in order to flat tow your Escape. According to Roadmaster, the fuse is located in the power distribution box under the hood. You would remove the 20 AMP Main Ignition Fuse in position # 28. Roadmaster highly recommends you confirm the fuse location with your Ford dealer. For more info about flat towing, you can check out the Flat Towing articles I have linked to.
    view full answer...
  • Where To Install Bulb Socket Kit for Flat Towing 2005 Jeep Grand Cherokee
    Roadmaster doesn't give us the exact location to install the Bulb Socket kits like the part # RM-155 you mentioned but we do know these are a fit for your vehicle. You will want to go with the bulb housing with the most room. It looks like the lowest housing is the one to use but you'll want to mock it up to see if it would clear as needed when the housing is reinstalled.
    view full answer...
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  • What Are Drilling Specifications When Installing RoadMaster Wiring Kit # RM-155 on 2014 GMC Sierra
    In the instructions, which I have attached for the RoadMaster Tail Light Wiring Kit # RM-155 does not give you specific mounting points. What they do give you are parameters to guide you to the correct location. According to the RoadMaster fit guide, if your 2014 GMC Sierra is the 1500 then this wiring kit will fit. My RoadMaster technical contact confirms that this kit has not been tested on the 2014 GMC Sierra 2500 or 3500 so they cannot verify this kit will fit. RoadMaster states...
    view full answer...
  • Diagram for Wiring the Sockets of the Roadmaster Taillight Kit part # RM-155 to the Wiring Harness
    To wire the sockets of the Roadmaster Taillight Kit part # RM-155 to the wiring harness you will just need to follow the diagram I attached that details where each wire goes. I also attached installation instructions and an install video for you to check out.
    view full answer...
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  • Is a Supplemental Braking System Required when Flat Towing a Vehicle Behind a Motor Home
    Supplemental braking systems are required by law in most states (with the exception of Missouri). In addition to being required by law, a braking system is just a good idea in general. It prevents all the braking being done by the towing vehicle which will reduce the wear and tear on it. Also stopping distances will be shorter because you will not have the toad momentum pushing you through an intersection. I have included a link to our FAQ article on supplemental braking systems that should...
    view full answer...
  • Why Ground Wire Is Required On Towed Vehicle When Installing Tow Bar Wiring
    As with the installation of lights on a trailer, the lights must be grounded, either through the mounting hardware which is the case for many lights. As with trailer wiring the # RM-155 needs the bulbs to be grounded to the vehicle to complete the circuit. It is true you get the ground from the towing vehicle but the in order for the circuit to be complete the towed vehicle wiring has to be grounded to the towed vehicle as well. I have attached a drawing from the installation instructions...
    view full answer...
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  • Will the Roadmaster Bulb and SOcket Tow Bar Wiring Kit Fit a 2011 Nissan Versa Hatchback
    We have not had anyone come to us with specific problems related to a 2011 Nissan Versa hatchback and tow bar wiring kit # RM-155. There are some things about the bulb and socket kit that you need to be aware of. There is drilling involved with the installation of this kit. You have to drill into the back of the tail light housing to mount the bulbs. There needs to be enough space inside the housing for the bulbs to fit without melting the tail light lens. There needs to be 1/4 inch of...
    view full answer...
  • Will Roadmaster Tail Light Wiring Kit with Bulbs # RM-155 Fit a 2008 Saturn Vue
    According to the Roadmaster, the Roadmaster Tail Light Wiring Kit with Bulbs, part # RM-155, will fit in the tail lights of your 2008 Saturn Vue. The # RM-155 kit will require you to drill a 1-inch hole in the back of the taillight housing right under the red lens. It uses the standard #1157 bulb which measures 1.83 inches tall and .97 inches width of the bulb. The sockets measures .95 inches where it goes into the lens. The instructions show to drill a 1 inch hole in the taillight housing...
    view full answer...
  • Wire Color Code For Roadmaster RM-155 Bulb and Socket Flat Towing Wiring Kit
    For the Roadmaster Bulb and Socket kit you referred to, part # RM-155, the wire color code is as follows: Yellow wire carries left turn/brake lamp signal Green wire carries right turn/brake lamp signal Brown wire carries running lamp signal White wire is ground To see product description video of the # RM-155, click the provided link.
    view full answer...
  • Recommended Tow Bar Wiring For 2002 Dodge Dakota To Avoid Splicing Into Dakota Wiring
    The wiring harness I recommend when flat-towing your 2002 Dodge Dakota is the Roadmaster Tail Light Wiring Kit with Bulbs, part # RM-155. This system bypasses your Dakota wiring by running the wiring beneath the truck. This does require installing the bulbs with sockets into the tail light housing on the Dakota. The kit includes all of the necessary wiring and hardware along with the instructions.
    view full answer...
  • Tips for Installing the Roadmaster Tail Light Wiring Bulb and Socket Kit on a 2008 Honda Pilot
    I recommend removing the tail light assemblies on your 2008 Honda Pilot before drilling into the back of them to install the bulbs. Also make sure that you do not drill through any vital components on the assembly. The wiring should be able to get routed down through the vehicle through where the tail light assembly mounts. When drilling, use bits that are made for plastic and start with a small pilot hole first and work your way up to the correct size for the bulbs. When routing the...
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  • Trailer Lights Only Work When Uncoupled from Hitch Ball
    The issue you described sounds like a ground issue which could be on the lighting assemblies, trailer side trailer connector, or vehicle side trailer connector. I recommend removing the ground wire on each of these and then sanding down the surface with some sandpaper and then using new mounting hardware to reattach the wires. The ground pin/wire inside the trailer connectors could also be loose as well. Once you have performed the above please let me know if that fixes your problem and...
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  • Tow Bar Lighting Recommendation for a 2008 Jeep Wrangler
    Yes, I checked with Roadmaster and the Tow Bar lighting kit part # RM-155 that you referenced has been confirmed as a fit for your 2008 Jeep Wrangler. I attached an install video that shows this kit being installed in a similar Wrangler as yours for you to check out as well.
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  • Will the Roadmaster Tail Light Wiring Kit, # RM-155, Fit in 2010 Ford Escape Lens Housing
    The Roadmaster Tail Light Wiring Kit with Bulbs, # RM-155, is a universal wiring kit, so it can be used on your 2010 Ford Escape as long as you have room in your taillight housing to drill a 1 inch hole under the red lens. It uses the standard #1157 bulb which measures 1.83 inches tall and .97 inches width of the bulb. The sockets measures .95 inches where it goes into the lense. The instructions show to drill a 1 inch hole in the taillight housing beneath a red lens to fit the socket...
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  • Will the RoadMaster Tail Light Wiring Kit # RM-155 fit a 2011 Ford Fusion
    Yes, I checked with Roadmaster and the RoadMaster Tail Light Wiring Kit # RM-155 that you referenced will work on your 2011 Ford Fusion. I attached a couple FAQ articles on tow bar wiring that you might find informative also.
    view full answer...

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