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When you’re flat towing, you want to be sure your towed vehicle’s brakes are actually being pressed—not just that the braking system *thinks* they are. The Roadmaster Stop Light Switch Kit wires directly into the car’s fuse box to provide a constant 12-volt signal to your RV’s monitoring system. It activates the alert only when your car’s brake pedal is physically applied. That means you’ll always know your supplemental braking system is working correctly and won’t risk it staying partially engaged.
If a braking system is installed wrong, it can keep pressing on the pedal even after you stop. That can cause serious wear on tires and brakes. This kit gives you real feedback from the pedal itself so you can catch problems right away. It’s a simple safeguard that helps prevent costly damage and keeps your setup safe and predictable on the road.
The Stop Light Switch Kit is built for a custom fit and includes the bracket designed for your vehicle. Reviewers like that the installation follows the instructions step by step and fits cleanly once in place. Everything wires neatly under the dash, with steady current from the fuse box so the system is reliable every trip. Tight spaces can make it a bit of a squeeze, but once mounted, it’s solid and stays put.
Built to run on 12 volts, the Roadmaster kit ties into your electrical system for dependable function every time you tow. Once installed, it works quietly in the background—no switches to flip or sensors to adjust. You just get a steady signal from your towed car’s brake pedal to your motorhome’s monitor, so you can focus on driving and trust that everything is working exactly as it should.
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:
90% were satisfied with this product
10% of customers were not satisfied
Ratings & Reviews
Henchman
1/30/2022
Works GREAT!!!
Ronald
6/18/2023
Great
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Jay
1/7/2025
it is nice to look in the rear view camera and see that the breaks are working on the car