Is this hard to install?

It works wonderfully. I installed it in a 2008 GMC Acadia and yes it was hard to install. I am not sure I want to do it again. I'm pretty handy as an aircraft mechanic but I felt the set up was unusually tedious to install. Lots of wiring to do and the air actuator took a bit of figuring where I could mount it. It took me 3 evenings to install it.

Is the braking proportional? I have a trailer brake controller on my motor home. Will it work with that?

please go to this link,http://roadmasterinc.com/pdf/25-5040-00.pdf,it will explain a lot.it is not however truly proportional,and does not work with your brake controller.you set the max level of braking and when applying the MH brakes,it will ramp up to the preset levelhope that explain things,theo

I dont see how it works if it doesnt hook to the brake pedal can it really activate the master cylinder to engage the brakes or is it for electric b

There is a cable that runs from the Invisibrake box mounted in the tow vehicle. The cable runs under the carpet and attached with a pulley system to the back of the pedal. When the brake lights on the coach come on, the box pulls the cable thus activating the brakes. Please feel free to call us if you have any technical, install, or questions. Thank you,The Hitch Spot602-321-1703

If you're asking if it will work on a 2003 Wrangler, I would think so. Mine is installed on a 2002 Explorer. I have flat towed it over 2,000 miles with no problems. I absolutely love it.

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Roadmaster 8700 InvisiBrake Supplemental Flat-Tow Braking System

Product ID: 21117620

Details

Automotive Fit Type
Universal Fit
Brand
Roadmaster
Global Trade Identification Number
Manufacturer
Roadmaster

📏Compact 8"x8"x2" stealth design

🔋Battery trickle-charge, never drains

⚙️5-100 PSI adjustable brake pressure

€ 2936.49

Duties & taxes included

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Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚦 Stop Smart, Tow Confident: Invisible Braking That Works as Hard as You Do

INVISIBLE INSTALLATION - Ultra-compact design fits discreetly under seats or panels—no space sacrificed, no clutter added.
POWER BRAKING PERFECTED - Energizes your towed vehicle’s power brakes for seamless, confident stops every time.
SMART BATTERY MANAGEMENT - Connects directly to your towed vehicle’s battery, trickle-charging as you go—zero drain, zero worries.
PLUG PLAY PEACE OF MIND - Fully automatic system activates with your motorhome’s brake lights—no switches, no hassle, just safety.
MADE IN THE USA BUILT TO LAST - Handcrafted American quality with a limited lifetime warranty—because your safety deserves the best.

The Roadmaster 8700 InvisiBrake is a compact, fully automatic supplemental braking system designed for towed vehicles with vacuum-powered brakes. It delivers adjustable braking pressure from 5 to 100 PSI, energizes power brakes for consistent stopping power, and connects directly to the towed vehicle’s battery to trickle-charge without draining it. With a stealthy 8"x8"x2" footprint, it installs discreetly and activates automatically with your motorhome’s brake lights, ensuring seamless, reliable braking. Proudly made in the USA with a limited lifetime warranty, it meets U.S. and Canadian braking standards for ultimate peace of mind.

Specifications

ASIN	B007HRTFIW
Automotive Fit Type	Universal Fit
Best Sellers Rank	#828,234 in Automotive ( See Top 100 in Automotive ) #303 in Trailer Brake Controls
Brand Name	Roadmaster
Customer Reviews	4.4 4.4 out of 5 stars (247)
Global Trade Identification Number	00758306313118
Included Components	Roadmaster 8700 InvisiBrake Hidden Brake System
Item Highlight	Fits Towed Vehicles with Vacuum-Powered Brakes \| 5-100 PSI Brake Pressure \| Built-In Battery Maintainer
Item Type Name	Roadmaster 8700 InvisiBrake Hidden Brake System
Item Weight	15.6 pounds
Manufacturer	Roadmaster
Manufacturer Part Number	8700
Manufacturer Warranty Description	Manufacturer Warranty
Model Number	8700
Number of Items	1
Orientation	Rear
UPC	758306313118

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