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Old 08-02-2011, 10:03 AM   #1
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Roadmaster - Invisibrake

Thoughts on this system...

Roadmaster Inc. - Tow Bars, Braking Systems & RV Accessories
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Old 08-02-2011, 10:17 AM   #2
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My only thought is the toad brakes will activate when the exhaust brake is used on long, down grades. That is unless you have a rig that this doesn't happen. My brake lights will come on when the exhaust brake is activated so this system would not work for me. I originally used the Roadmaster Evenbrake but it applied the toad brakes when I used the exhaust brake and this ruined the pads and rotors on a new pickup in less than 1000 miles. Roadmaster claimed this could happen on certain vehicles but it wasn't called out in the wiring instructions. My M&G brake system is awesome, has one moving part, no electronics to go south and hooks up in 5 seconds.
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Old 12-27-2011, 03:36 AM   #3
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I'm getting the Invisibrake system installed but I don't know yet if my rig has the exhaust brake light coming on. I know the ecm can be adjusted so the light does not come on. I'll do that mod if my system has it. The coach is not with me right now or else I'd check it.
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Old 12-27-2011, 10:18 AM   #4
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Quote:
Originally Posted by BigSkyBob View Post
My only thought is the toad brakes will activate when the exhaust brake is used on long, down grades. That is unless you have a rig that this doesn't happen. My brake lights will come on when the exhaust brake is activated so this system would not work for me. I originally used the Roadmaster Evenbrake but it applied the toad brakes when I used the exhaust brake and this ruined the pads and rotors on a new pickup in less than 1000 miles. Roadmaster claimed this could happen on certain vehicles but it wasn't called out in the wiring instructions. My M&G brake system is awesome, has one moving part, no electronics to go south and hooks up in 5 seconds.
If you go farther down on the page in the link there is another link to the installation instructions. Roadmaster recommends the installation of diodes in the toad brake light wiring harness. This is to prevent feedback to the brake light switch when the exhaust brake is activated. Once the diodes are installed the only time the normally cold side of the toad brake light switch will become hot is when the Invisibrake system activates the brake pedal.

We have the older BrakeMaster 9060 which I also wired with the diodes. The brake lights on the toad come on when the brake lights on the coach are activated but the signal doesn't feed back to the brake light switch. The toad braking system is only activated when the brake pedal in the coach is depressed sufficiently to send a signal to the valve that activates the toad brake pedal air cylinder.

I know it's a different system but the diodes perform the same function of isolating the toad brake lights. In our case we have an LED monitor on the dash that lights only when the brake pedal in the toad is depressed.

In short the system should work fine if the vehicle you are installing it in does not have an active braking system (power brakes are active even when the ignition is off) and you install diodes in the toad brake harness to isolate the exhaust brake brake light signal from the coach brake pedal brake light signal.
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