When you’re flat towing, it’s important to know what your towed car’s brakes are actually doing—not just what the braking system thinks they’re doing. This Stop Light Switch Kit activates your motorhome’s brake-monitoring system whenever the towed car’s brake pedal is pressed. Instead of relying on signals from an air cylinder, it reads the pedal itself, giving you an accurate picture of what’s happening in real time.
If a supplemental braking system is set up wrong, it can keep pressing the pedal even when it shouldn’t, wearing out your tires or brakes. This kit eliminates that risk by giving clear, direct feedback through your RV’s monitor whenever the pedal moves. You’ll know right away if something’s off, so you can fix it before it causes damage.
The kit wires straight into the towed car’s fuse box to ensure a constant 12-volt current. That direct power source keeps the system dependable every time you tow, without relying on temporary connections or accessory circuits. It’s a clean, integrated setup built for reliability.
Some vehicles don’t have a “tow” position in the ignition, which can make monitoring the brakes tricky. This Stop Light Switch Kit solves that problem by working independently of ignition settings, so you still get accurate brake signals and full peace of mind every time you’re on the road.
Flat towing can be a much more convenient way to take your car RVing with you than using a trailer or a tow dolly. It'll save you storage space both at home and at the campsite, and it takes less time and hassle to hook up.
To flat tow your vehicle, there are 5 basic components you're going to need: a tow bar, a base plate kit, a safety cable set, tow bar wiring, and a flat tow braking system.
| For the RV | Between the RV and Towed Car | For the Towed Car |
|---|---|---|
| Hitch | Tow bar | Base plate |
| Wiring plug | Safety cables | Braking system |
| Wiring adapter cord | Wiring kit/diodes |
The custom-fit base plate installs on the frame of your toad so you can connect the car to your RV with a tow bar. Hook up safety cables between the vehicles to ensure that the toad does not separate from the motorhome if the tow bar becomes detached. Tow bar wiring syncs your vehicle's signal lights with your motorhome's tail lights, as required by law in most states. Finally, the flat tow braking system - also required in most states - activates the brakes in the toad when you hit the brakes in the RV, making for smoother, safer braking, and preventing wear on your motorhome.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everyone. Steve here with etrailer.com. Today, we're looking at our Roadmaster stop light switch kit. Now, this is a custom fit application, so make sure you're checking our fit guide here at etrailer.com. Be sure you're entering year, make, and model, sub-models, any kind of things it asks you to be sure you're getting the right parts the first time. Now, if you're not sure, basically, this activates your motorhome's brake monitoring system whenever your brake pedal in the towed car is applied.
And then, it talks to the RV, saying, "Hey, I'm working, I'm working," and basically tells you that it's working properly. You obviously get the brake light switch here. All of that kind of stuff is pretty universal as far as the in fuse. In-box tap fuse adapter here, sorry. This will basically plug into your fuse box, and then the fuse will go inside so that you don't have to cut or splice.
And then, you do have these two wires. Obviously, you'd have to wire them up to this part, but you're not cutting or splicing the main vehicle. Now, this bracket is gonna be the main custom part that's custom to, in this case, that Jeep Wrangler 4xe, so just keep that in mind. Now, everything here is a direct fit for that vehicle and it works great if you don't have any tow position in the ignition on that specific vehicle. Folks, that's gonna wrap it up for our look together.
I'm Steven, again, if you have questions about this or any of our other products, feel free to reach out to us. We'll be more than happy to assist you. Have a good one.
Ratings & Reviews
Easy installation. Fit perfectly in my 2014 Grand Cherokee.
I purchased this product for a 2018 Wrangler JL. It is extremely time consuming and near impossible to install a trailer brake controller in this Jeep without it.
Ive installed the ble ox base plate bx2654 and the remote battery disconnect #766. Installation was easy great instructions to follow. Also installed 12 volt outlet kit #9332. I'm installing led bulb and socket kit 152-led. Great so far.
Great product installed very easily. I also used this switch to install a Brake Controller. By using this I did not have to tap into the Wrangler electrical system for the Bake Controller.
This is the second switch I’ve bought. The fuse holder could be designed a little better. Perhaps with the wire out the top rather than the side.
Did not use
The instructions are a little difficult to follow but it was easy to install
Easy installation. I had an issue getting the kit ordered, but the customer service agent was phenomenal in her assistance getting it resolved.
Mount was good and directions easy to f ollow.
Installed on a 2023 Equinox LT (AWD). I believe there may have been a change to the Equinox brake pedal assembly from prior years. Because of this, I was not able to get the switch located properly with the bracket that is included in the kit. I fashioned my own mounting plate from a piece of diamondplate which I bolted to the brake lever bracketry. This works great and is rock solid.
etrailer’s installation video was very helpful. However, the mounting bracket holes on either end seem to be the same size (the video and instructions state that the switch fits into only one end but for me it fit into both). Consequently, it is not clear which side of the bracket to use for the switch vs the vehicle stud. One other installation hint, perhaps unique to the Wrangler Rubicon or Wranglers with upgraded audio/Uconnect, there is an electronic module (3”x4”), mounted to the dash framework behind the lower dash panel, that must be dismounted in order to allow access to the bracket mounting location (see photo).
It works as designed. Tricky for this old fat guy to work under the jeep dash but eventually got it installed and adjusted.
Was disappointed that your site said this was the part I needed so I ordered it. Then realized it was not correct part. Called next day to cancel and Oder correct part. I was told I could not cancel it and would have to pay to ship it back. The correct part which was ordered second came 2 days before first part. To get a refund I still had to pay to ship it back. Other than this trailer has been good to work with and quality parts.
Thank you, order arrived as promised, and install was easy and fit my 2025 Jeep Grand Cherokee Overland perfect to operate my brake light on my Motorhome dash.
Ill give it 3 stars because I had to shim the bracket to make the plunger line up with the brake arm. But it works well so far.
It is my opinion that the universal brake light switch is the easy way to go. Hardest part doing the DIY way is the place you are working in. I.have a few sore spots trying to get underneath the steering wheel. The benefit is you have instant info that the switch works. A light comes on when you push the break pedal
Works great fairly easy install. It has been in use for the last 8 month's with no issues. Here may be some helpful hints that I found when installing. Use 10-12" long extension for 13mm nut (left side of opening panel that was removed). Install bracket. Adjust plunger & backing nut by feel. Remove bracket. Install switch with ring washer & nut. Crimp red & green wires on switch wires. Reinstall bracket under dash.
Roadmaster products are great, very pleased with the superb instructions. Very difficult to mount the pulley for the invisibrake in my Ford Maverick. Trying to drill stainless steel behind the brake pedal was near impossible. Could a bracket for the pulley be mounted on the same studs as the Stop Light Switch?
I have a ‘23 Bronco with the Lux package. The Bronco had a factory brake switch in the spot this thing would go. Advice was unclear whether I could use a factory wire to install my brake controller. I went with the wire that lit the test light when brakes were pressed (key on). I think it was violet with a stripe at the plug for a factory Brake controller. I don’t have the factory tow package. Seems to work but not yet tested with a trailer. Only 3 stars because of the uncertainty. I’ll use this switch on a different project.
Product works great...But was shorted the female connector to terminal 1...Cost over 5 dollars at Auto Zone.As no one sells just one.....Its in the picture...Not in my parts bag...But a perfect fit on the brake switch mount .Three stars only because I had to go buy a connector to complete the job.
One year later and I haven't had to touch this system even once. It just works, all the time, every time. Very happy with this kit. Works perfectly in my 2019 Toad (Jeep Cherokee).
I couldn’t use the towed vehicle’s brake light circuit on the last two pickups I’ve set up. On the truck before this I robbed a little refrigerator switch that turns on the light when you open the door and rigged up my own. Alas, that wouldn’t work on this newest GMC Canyon. Then I found this device. Wow, what a quick and easy installation. It works perfectly.
I do have a suggestion for ETrailer. Show the actual switch dimensions in your listing. Though the actual switch is quite small, I was worried I wouldn’t be able to make it fit. With nothing but pictures and nothing for scale, it was a concern.
I installed the item in my 2024 Bronco to support braking indication in the motorhome while being towed, since Ford does not include one these days. As far as I can tell, this is the only commercially available kit to avoid cobbling up your own design. It is tedious to install mechanically and, especially tedious to adjust transverse mount position and depth of travel. The button on the switch is too small, requiring very precise alignment to the brake pedal arm (approx 1/4" wide) in the transverse direction from the switch movement. There is no screw type adjustment in that direction so bracket bending/and or bracket mounting spacers is required. I am also afraid the switch button being small and made of some type of poly, it will slip sideways, deform, or wear with even the slightest offset and begin to push the bracket aside. However, it has worked in a few thousand miles of towing behind a motorhome so far. I will keep an eye on this and test function whenever hooking up to tow (a normal practice anyway). I kept thinking it would be easier to use a long lever low force microswitch instead of a tiny soft-tipped, rather hard spring or drag, pushbutton, which would require its own mounting design. Maybe a small highly adjustable ball clamp mount work with a microswitch as well. But I must resist my engineering background tendencies in exchange for getting the job done! Sorry for the quality of the photos. It is in a difficult place for phone camera.
Thanks everyone at etrailer for your help and quick response and shipping! My project turned out really great as you can see in the pictures I have included. The plug for the removable holders I 3D printed. Thanks Fred
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