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A common problem when flat towing is not knowing whether your towed car’s brake pedal is actually being pressed or if a system fault is holding it down. The Roadmaster Stop Light Switch Kit solves that by directly activating your RV’s brake-monitoring system whenever the towed car’s pedal is applied. This way you can see real braking activity, not just a signal from an air cylinder. That assurance helps prevent damage from a stuck pedal or dragging brakes and keeps your tires and braking components safe from unnecessary wear.
When you’re towing, knowing that the supplemental braking system is working properly gives real peace of mind. This kit wires into the towed vehicle’s fuse box for constant current at 12 volts, sending a clear signal back to your RV every time the pedal is pressed. It ensures your braking system is functioning exactly as it should and keeps you aware of what’s happening behind you on every trip.
Some vehicles lose their brake-light signal when the ignition is turned to the “tow” position. This kit provides a dedicated signal path so your supplemental braking system still receives accurate pedal information even when the factory setup won’t. That means consistent braking feedback and a simpler, more dependable towing experience.
Designed as a custom-fit solution, the Stop Light Switch Kit ties directly into your existing setup without guesswork. Its direct-wire design gives a solid connection that maintains steady current flow and dependable operation for the long haul. Once installed, it becomes a seamless part of your flat-towing system, quietly doing its job every time you hit the brakes.
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, everybody, Andy here with etrailer.com. Let's take a quick look at this Roadmaster stoplight switch kit. Now at the time of the recording of this video, this kit has been designed to fit your 2023 to 2024 Chevrolet Equinox. And on custom-fit parts such as this kit, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle, and our fit guide will confirm if this will work for you or if we have something comparable that will work for you. So as you might know, this kit is going to allow your RV's monitoring system to alert you whenever the brake pedal of your towed car is being applied.
Other systems operate according to whether the air cylinder is extended and provide really no indication of what's happening with the pedal itself. So if your supplemental braking system is improperly installed, it may be continuously pressing on the pedal, impeding it from fully retracting and possibly causing damage to your vehicle's tires and braking system. With this Roadmaster stoplight switch kit, you're always gonna know when the brake is being depressed and you will avoid costly damage. This is gonna work great for any application that does not have a tow position in the ignition. This is going to wire directly into the towed cars fuse box for constant current.
You see it has a fuse tap here, fuse, and then a fuse holder, the wiring and the switch, and the bracket and hardware. You're also going to get instructions here to guide you through the pretty simple installation process. Do you happen to have any other questions about this kit or anything else that we carry here at etrailer.com Don't hesitate to reach out to us. We do wanna be sure that you're getting exactly what you want and need. Well, again, my name is Andy.
Thank you for joining me.
Ratings & Reviews
Victoria H.
1/14/2025
That's quite impressive Fred, nice ride!
Fred
1/8/2026
Everything works just fine! Great product and support! Thanks E-t
Josh B.
1/8/2026
Alan
9/8/2026
Its been a year and to be honest, I never have to think about my tow setup. Its there, it works perfect like the day I got it. I cant recommend this any higher. Smooth towing without worrying about it.
Lazer S.
9/8/2026
Kate F.
12/17/2025
I wish you could mount it there Donald, but those stop-light-switch studs are only designed to hold the switch bracket. Adding the pulley bracket changes the spacing and alignment, which can make the brake lights stay on, not come on, or throw off the Invisibrake’s operation. The studs also aren’t meant to handle the side-load from the cable, so Roadmaster doesn’t recommend using them. For drilling stainless, the trick is a cobalt bit (M35 or M42), slow speed, steady pressure, and cutting oil so the metal doesn’t work-harden. Are you new to flat towing, or just getting a different vehicle set-up?
Michael R.
1/18/2024
Still working great
Mark S.
11/3/2025
Its a good choice because its easy in easy out. I have two jeeps that can flat tow, so i was covered for braking in either one
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Kate F.
4/23/2026
Thank you for the detailed review and for sticking with the install George. That is a tight space to work in, and we really appreciate you sharing both the challenges and your thought process along the way. You make some very valid points about the alignment sensitivity and adjustability of the switch. I agree, that kind of precision fit without an easy lateral adjustment can make the install more tedious than it should be. It does not make it right, and feedback like this is exactly what helps highlight areas for improvement. It is great to hear that it has been working reliably for you over a few thousand miles so far. Your habit of checking function during hookup is a solid practice and definitely the way to go with setups like this. I will be passing your feedback along to the manufacturer for review, especially your notes on the switch design and mounting adjustability. Also, thank you for including photos even with the tight space. They are very helpful for others tackling the same install.