Installation and Power Source of Roadmaster InvisiBrake Supplemental Braking System

Updated 11/30/2021 | Published 11/29/2021

Question:

I have had an invisibrake fitted to my 2021 Thor 27FE motorhome and 2021 Subaru Crosstrek Toad. I dont believe the monitor light is illuminating when the Subaru brake is activated. I believe it should illuminate each time the brake is applied. I have the pressure set to 60psi. Where would the 12volt positive wire have been connected to get energised from the Subaru.? I watched the tech install the monitor light on the dash of the Ford motorhome which took him around 10 minutes. I am confused as to where the monitor is wired. Many thanks for your assistance.

asked by: Paul L

Expert Reply:

The brake controller on the Roadmaster InvisiBrake Supplemental Braking System, # RM-8700 is to be connected to the towed vehicles battery terminal or another appropriate power source. It depends on where your installer selected to pull the needed power from. Yes, the indicator light should come on when the brakes are applied.

Please note the attached image showing the wiring diagram of the Roadmaster InvisiBrake Supplemental Braking System, # RM-8700.

expert reply by: Michael R