Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
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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.
Note: Towed car must have enough room inside the tail light lens housing for an extra bulb and socket.
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.
Today on this 2011 Cadillac SRX, we're going to install part number RM-155 from Roadmaster. This is a Roadmaster tail light wiring kit with bulbs. To start off our install, we're going to go ahead and get access to our wire harness. Now we're going to need to start off with the large wire harness with two inaudible 00:00:17. We'll go ahead and remove one of the ends. We'll talk this end and thread it from the front of the car towards the back. We'll start off by running it through the grill and up by the base plate. To help with the routing, we'll loosen up the bottom inaudible 00:00:30 by removing these screws.
These will be reinstalled once we've routed our wire. We'll take out all our slack and leave some extra up front for working room for later. Then we'll go ahead and route it over the sub-frame going towards the back, following the existing lines underneath the car. And when we install our wire harness, we'll make sure to stay away from anything moving, like suspension components, or anything hot like the exhaust. This time we'll go over the sub-frame for rear suspension, and follow existing wiring up on towards the tail light. Then we'll go ahead and zip tie our lines to make sure they're safe, secure, and out of the way. We'll go back to the front of the car and install some of the loom material that comes with the kit. We'll add a few loops of tape to the loom as we install it so we can slide it into place.
Then we'll go ahead and tape up the end. At this point, if your tow bar and use a four pull harness, you'd be finished. All you need to do is zip tie it off or mount it in any fashion you need to. In this case, we'll be upgrading our four pull to a different connector later on. Next we'll go ahead and remove the tail lights. There's a cover we have to remove on top, then we'll get access to the screws.
And then we can go ahead and remove the tail lights. Once the screw is removed, we pull straight back to release the snaps. It'd be a good idea to use a trim handle tool on the attachment point up on the tail light to get it started and then we can work it loose. Once we've removed the tail light housing, remove the plugs to the light to completely disconnect the tail light from the vehicle. We'll start on our passenger's side and then we'll do the same thing over on our driver's side. Okay, if your tail light's removed, go ahead and get ready to drill a hole in the back of the tail light. Now when we drill into our tail light we want to make sure we stay away from the LED part.
Our bulb will end up going at an angle right next to our existing bulb. At this point to make things a little easier to work with, we'll go ahead and remove the sockets that hold light bulbs that are in the light. We'll go ahead and reinstall those last. To start off making our hole, we put our hole saw where we wanted it. Then we measured from the top and we got about three quarters of an inch. And then we're drilling a half inch hole so we went down about a half an inch. This is really going to be a tight fit, so it really pays off to be careful about your measurements. So we'll go ahead and find our center. In this case, we'll drill out a hole that'll be about one inch in diameter. Then we'll go ahead and start off with small inaudible 00:02:51 hole and then worked our way up to our hole saw and we drill through both layers: the outside layer and then the reflective layer on the inside. We'll put our bulb and socket back together and then we'll go ahead and install it. Now you'll notice the tabs to hold the socket in place are bent in and doesn't grab the hole very well. We're going to take the edges of the light socket that will grip the plastic and bend them out. We want a tight fit when we push it back into place. Then once your bulb's in place, we'll go around the edge with some silicon. We'll be using LocTite sealant with part number LT37467. Now with the bulb and socket installed, we'll go ahead and reinstall the original bulb and sockets rewire harness. When we're done with the passenger's side, we'll go ahead and repeat the same process over on the driver's side. Once both sides are done we'll take our wire harness and pull it from the bottom to the top using a piece of airline tubing to help pull it up. Then we'll make sure we have enough excess to reach the passenger's side as well. We'll measure how much wire we need for the driver's side and zip tie it to the factory wiring harness. We'll then cut the wires we'll be connecting to the driver's side. Next, we'll split the wires apart at the end. We'll strip back the black wire, the brown, and red wires from our new bulb and add provided buck connectors. You'll notice the brown and black wires get the larger buck connectors. The black wire from the bulb harness will be connected to the two white wires. One coming from our four wire harness and the other from the access wire which will eventually be routed to the passenger's side. We'll strip and splice the two white wires together and make our connection. We'll repeat this process for the brown wire from our four wire harness and our brown wire from the bulb harness. Again, this will connect the two brown wires, one being routed to the passenger side. Now our red wire will connect up to our yellow wire using a regular buck connector. Once our connections are made, we'll go ahead and wrap them up with some electrical tape. Now our green wire will not be used. This will have to go on our to our passenger's side for our right turn signal. Now we really didn't need to cut our green wire earlier, but we just pull it off to the side to make it a little less confusing. So at this point, we'll go ahead and reconnect our green wire and then continue on running our wire harness over to the passenger side. We'll keep it away from the exhaust by using a couple of loom clamps, part number A0500. And then we'll go ahead and pull our wire back up towards the passenger side tail light, and then we'll make our connections. The color code will be almost the same. White to black for a ground, brown to brown for a running light circuit, and in this case we'll be using our green wire going to our red wire. That'll be for our right turn signal. With all our connections made, we'll go ahead and tape up our wires, making sure they're secure and won't move around any more than they have to. And then we'll go ahead and reinstall the tail lights. You may have to move the wires around to make sure everything fits in precisely. With our lights reinstalled, we'll go ahead and supply power to our circuits and see how it works. We'll go ahead and try our turn signals one at a time, left turn then right turn, and then our running lights. And then we'll go ahead and do our turn signals again with our running lights. Okay, looks like everything is working. And with that, that will finish it for our install of part number RM-155 from Roadmaster on our 2011 Cadillac SRX. .
Average Customer Rating: 4.4 out of 5 stars (42 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.
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. 86819
by: Frank S.05/25/2013
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. 81930
by: Scott D.11/12/2014
Overall, pretty happy with this product. I found the quality of the product to be very good. I was lucky in that I own the same year and model car as in the installation video on the etrailer.com website, so following along was fairly easy. It took my 15 year old son and I about 2 hours to install. Most of that was trying to run the cable underneath the car, which is very low to the ground even when jacked up. I would have preferred to run the cable through the interior, but was not able to locate an adequate entry point into the cabin. Overall, installation is pretty straight forward. It might be more difficult for vehicles who's entire light fixture can not be removed. The product works great and as expected. 160603
Arrived in perfect condition and very quickly (3 Days) for reg. shipping. Thanks much. 59116
by: Jorn V.11/25/2014
I knew I didn't want to deal with magnetic lights for towing my Jeep behind the RV so I purchased this Roadmaster kit. I was a little apprehensive since I have virtually no knowledge with electricity. However, installation of this kit on my 2002 Jeep Wrangler was a breeze! It took me (by myself) about 3 hours of working slowly (to make sure I wasn't cutting the wrong wire!) and frequently checking the installation video on this website. The most difficult thing included in the installation is to make two holes to fit the bulbs; for this you'll need to probably go out and buy a hole saw from HD or Lowe's. Great product, easy installation! 162459
by: Ron M07/11/2013
Very simple to install. I had plenty of room for another bulb. One downside was the 1inch hole they have you drill is not large enough for the bulb to go thru so I had to ream the hole a little. 88844
by: Jeff Shaeffer10/22/2013
I ordered tow light kit RM155 for my Jeep Wrangler so we can tow it behind the motorhome. The kit was shipped imeadiately after my order was placed,and was at my doorstep within 5 working days. The installation was easy,the instructions were easy to follow. I couldn't be happier with the Quality and service. 104785
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. 147006
by: Steven Hosford07/22/2011
I ordered a (tow) brake system and wiring kit for my Jeep GC to facilitate towing this vehicle behind my motorhome. The service was great, delivery was quick, and the products were as advertized with no suprises. I would certainly buy from these folks in the future. 19857
by: KENNY G.02/21/2011
JUST A SHORT NOTE TO CONFIRM THAT I HAVE RECEIVED THE BASEPLATE AND WIREING HARNESS FOR MY TOW VEHICLE! THE SERVICE WAS FANTASTIC, AS WAS THE PRICE! I WILL DO BUSINESS WITH ETRAILER WHENEVER I NEED THE PRODUCTS YOU SELL. THANKS AGAIN KENNY 7532
Works as advertized. Easy install...just make sure you have 2 inches between your exsisting bulb and the kit bulbs. Not enough wire though....I had to go buy a 6' lenght to run from taillight to taillight. Hence the GOOD rating. 11557
by: wiring kit06/17/2013
enough wire to complete the job on a Wrangler, Followed the Blue Ox drill reccomendation from the mount plate and worked perfectly. Maybe a little pricie for what you get but its all together. 84968
by: Danny M.06/20/2014
On the 2014 jeep wrangled, the lenses are one piece sealed so there isn't a good way to drill the hole because if you make it big enough for the bulb to fit through, the socket is loose. 136722
by: Kim P.01/20/2015
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. 170597
by: Bill R.05/15/2014
etrailer is simply the BEST. The Roadmaster Universal Wiring Kit Product is excellent and simple to install thanks to the great instructions and etrailers how to video is right on. 130802
by: Larry H.10/13/2013
Hard to install on 2013 Jeep Grand Cherokee as it is very difficult to determine where to drill so you have clearance and don't drill in to something vital. 103638
by: John G.03/05/2011
received very fast and the instructions with the kit were very easy to understand. Making the wiring job of my dinghy easy and simple. Thank You 8531
by: Bob G.03/25/2011
Roadmaster products are all very well made and have excellent instructions and are easy to install.....very good products with great customer service. 10373
by: Allen G.03/05/2013
I haven't installed the kit yet but it looks good. I did install the base plate I ordered from you. It went together will. Thanks a lot, Allen 69030
Easy install with very good instructions. The wiring did run short and I had to go purchase and extra 10 feet of wire to run between lights. 12669
Perfect product for my needs. Going to be fun just installing it! Great product and GREAT SERVICE from etrailer.com. Thanks again! 75792
by: Kerry St Piere07/19/2012
Easy installation but wire was too short had to purchase more. Over priced for what you get. Lights are not as bright as expected. 48538
by: Glen B02/02/2011
Excellent service and right on. Needed it quick and got it fast without asking for special delivery. Thanks, Happy Customer 6548
by: Wire harness08/12/2014
You save me a lot of time .. instead of making my own harness, I can readily install a etrailer harness made for my vehicle 146286
by: Mike V.03/23/2013
Good directions, straight-forward installation. Quality of bulb sockets is average, but rest of kit is highy quality. 72098
Product arrived promptly. Installation was simple. The hardest part was running the wire inside the frame rail. 148717
Simple installation, and much easier than messing with magnet lights. Video instructions were spot on! 159368
by: Thomas T.08/05/2013
it take a little longer for me to installed light, but I like it. I will highly recomment this product. 93362
by: Louis E.07/16/2012
Everything I ordered was shipped and I have already wired our Yaris for our RV lights to work. 48152
by: jim p11/01/2014
Super quick shipping quality product. I will buy from them in the future. 158741
by: Jim S.06/22/2014
Very good product. Fast shipping. Excellent company to do business with. 136972
by: sam s.08/20/2012
Worked great with all parts needed to do the job easy install 52328
Easy install, work great! Wire connectors could be better. 120129
by: Larry H11/18/2014
Excellent service, good follow up, reccomend them highly. 161683
by: Mick M06/16/2013
Awesome response delivery time, product just as ordered. 84850
by: Bill B12/08/2014
everything I needed to hook up my tow l ights. 163584
by: Steve N07/18/2011
Worked just as advertised...very please d! 19673
Great price and fast delievery. Thanks 49624
by: Billy Smith02/25/2011
Everything I need. Excellent seller. 7881
by: Mark V.08/05/2013
Thanks works great 93224
by: Ed P04/03/2014
Harnes was ok 123532
Works well 142120
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