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When you’re towing with an Air Force One system, you need to know your brakes are actually being applied. This stop light switch kit connects to the vehicle’s battery and output air line so it can sense exactly when the brake pedal is pressed. It then signals your monitoring system, confirming the supplemental brakes are working as they should. Even when the ignition is off or the battery is disconnected, the switch keeps that feedback loop alive so you always know your brakes are doing their job.
Some vehicles don’t activate their brake lights when the engine is off. That’s where this kit makes the difference. It provides a dedicated signal path for your Air Force One system so the monitoring light in your RV still shows real braking activity. Whether your vehicle’s factory circuit goes dead in tow position or when the battery is disconnected, this add-on switch keeps the system functional and compliant.
The kit includes the hardware needed for a straightforward mount and hook-up to the Air Force One system. Reviews call out how easy the install is, with clear documentation and install videos that walk through each step. Once in place, the switch stays tucked away, ready to work every time you hook up without adding clutter or complexity.
Tow after tow, this switch ensures the in-cab indicator lights up only when it should—when your towed car’s brakes are actually applied. That consistency builds trust in your setup, especially on long or mountain hauls where knowing your braking system is operating correctly gives you peace of mind.
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:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
I have never had any problem with any of the personnel or any of the products that they sell. Always get what I ordered and always delivered in a timely manner.
Top notch,
Just what i was looking for. very easy to install.
Item was easy to install and kit contained all required materials. Very pleased with the quick and easy installation.
This is the second vehicle I've installed the switch in with the SMI Air Force 1 braking system. It's the best way to send a signal to an LED light on the dash of the Motorhome to let me know that the system is working. Great product. Easy to install.
I bought this kit to add to the Denco automatic braking system, that I installed on my Jeep. It is used to trigger a signal on my Demco wireless break monitor so that I am positive that the braking system is functioning.
Just finished installing the SMI AF1 on a 2012 Tiffin Phaeton and 2014 Chevrolet Silverado. While it took me substantially longer than the pro's, I found it straightforward to install and well documented, between SMI's video and etrailer's video. The brake system itself seems to me to be both well designed and well made. So far, it works just as advertised.
I used the Demco air pressure brake switch kit and Demco Wireless coachlink at the same time I was installing Duo Stay in play to Air Force One conversion kit. These two items replaced Univeral Brake light Kit and dash indicator light(this set up was hard, if not impossible,to see during sunny day.
Do you have a question about this Flat Tow Brake System?
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Just D.
2/6/2016
After a year, its still working fine.