Supplemental Braking System for Towed Vehicle Travelling Steep Hills
Updated 02/17/2025 | Published 01/21/2020
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Question:
Thank you so much! I was leaning to the SMI Duo. I'm going with the Roadmaster Falcon 2 AT and base plate and have the wiring kit, smart diode kit and battery disconnect on the way as well. We'll be hooking to a 7-pin on a Newmar Ventana LE. The toad is 2019 Ford Edge ST. Are there other parts in addition to the Duo I'll need? I believe it already has a battery charging line. Maybe a brake light switch? I don't know, please advise.
asked by: Biff B
Expert Reply:
For an application where steeper inclines will be traveled on the Invisi-Brake # RM-8700 would not be my first choice for a supplemental braking system since the braking pressure when you apply the tow vehicle's brakes will always be the same pressure. Instead I'd recommend the DUO part # SM99251 which is a similar type of system but uses an inertia sensor to detect how hard you are applying the tow vehicle brakes and applies a proportionate amount of braking to the towed vehicle's brakes. The install is overall easier than the Invisi-Brake too.
The second line splice you mentioned in the video of this on the 2015 model would be the same on your 2019 model as well. I attached linked to the install video for you to check out too.
Robert M.
2/17/2025
Just purchased an invisibrake from you folks. While going over instructions / description I became concerned about the installation on our 24 Jeep Grand Cherokee Overland (has a battery installed under drivers AND passenger seat. Also questioned the systems use on long grades where exhaust brake / brake lights would be on pretty much constantly. Saw an older answer by you stating that the invisibrake would NOT be the best choice when using on long grades???? Since we do large percent of our travel in the mountians this is a major issue. Do you still feal that way ? Do you still recomend the DUO part # SM99251. My install is on hold until I hear from you. Thank you Robert D McAllister [email protected]
Jameson C.
2/17/2025
Jameson C.
2/17/2025
Product Page this Question was Asked From
Roadmaster InvisiBrake Flat Tow Brake System - Preset
- Flat Tow Brake System
- Brake Systems
- Pre-Set System
- One-Time Setup
- Vehicle Battery
- Fixed System
- Power Assist Brake Compatible
- Air Brakes
- Hydraulic Brakes
- Indicator Lights
- Roadmaster
more information >
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on Flat Tow Brake System
Biff B.
1/21/2020
Thank you so much! I was leaning to the SMI Duo. I'm going with the Roadmaster Falcon 2 AT and base plate and have the wiring kit, smart diode kit and battery disconnect on the way as well. We'll be hooking to a 7-pin on a Newmar Ventana LE. The toad is 2019 Ford Edge ST. Are there other parts in addition to the Duo I'll need? I believe it already has a battery charging line. Maybe a brake light switch? I don't know, please advise.