When you’re towing, you want to know exactly when the towed vehicle’s brakes are being pressed—not just when a cylinder moves. This kit wires into the vehicle’s fuse box to draw a constant 12-volt current and sends a direct signal from the brake pedal itself. That means your RV’s monitoring system lights up only when the pedal is actually pushed, giving you a true picture of what’s happening and protecting your vehicle from the damage that can come from a brake that’s held down too long.
Improperly installed supplemental brakes can stay partially engaged without you realizing it. Over time that can overheat the brakes or wear down your tires. The Stop Light Switch Kit keeps that from happening by confirming the pedal is fully retracting when it should. You’ll catch issues before they cause damage, saving the braking system and your tires from unnecessary wear.
Because it wires directly into the fuse box for a steady 12-volt feed, this kit stays powered and consistent every time you tow. There’s no guessing about whether the signal will drop out or fade mid-trip. It’s a simple, dependable setup that ties right into your existing electrical system for clean operation and accurate monitoring.
Some vehicles don’t have a tow position in the ignition, which can make monitoring the braking tricky. This kit solves that problem by giving you a dedicated brake signal regardless of ignition position, letting your supplemental system and monitor work as intended. It’s a straightforward fix that keeps your setup reliable trip after trip.
Not every vehicle has the same layout behind the dash or around the pedal assembly. This kit’s design makes it easy to mount securely and tailor to your setup, so you can get a clean, functional installation that looks right and works perfectly.
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.
Customer Satisfaction Score:
85% were satisfied with this product
15% of customers were not satisfied
Ratings & Reviews
Easy installation. Fit perfectly in my 2014 Grand Cherokee.
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
It works
This is a great device. The reason I bough it from ETrailer is because of customer service. They are super helpful.
Place the brake as suggested and try it out. Works just as expected.
Had an issue with expedited shipping. Once I received the part I contacted etrailer and it was resolved within a couple minutes.
It fit perfect in my 2022 Lincoln Nautilus! And the instructions were excellent and well done! Thank you folks !!
Great Product very adjustable for mounting on all types of vehicles!
Installed in 2016 Ford Edge Titanium. Had to buy additional cable connectors that were not included in the kit and instructions did not specify they were required. I would have given 5 stars if it was at least mentioned in the instructions.
Ordered parts for installing a brake controller.
The videos that are part of the web site were a great help in selecting all the needed parts, detailed down to the part numbers that were needed.
I really like the fact that there is a video showing the brake controller installation with my specific vehicle.
Great service !
Some pieces from this kit were needed for installing a brake Controller in a 2016 Sprinter, without the tow package. It works and the van doesn't flag any errors or codes. I talked to a helpful etrailer rep before buying to confirm my application and that personalized service was much appreciated.
Do you have a question about this Flat Tow Brake System?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.