Troubleshooting Roadmaster InvisiBrake Lack of Air Pressure

Updated 08/12/2019 | Published 08/09/2019

Question:

Roadmaster Invisibreak braking system I have had this system on my car that I am towing for about two or 3000 miles it has worked perfectly until lately now the compressor run but it does not build any air pressure can you help me

asked by: Sid H

Expert Reply:

I can certainly try and help you find out what the issue could be related to your Roadmaster InvisiBrake Supplemental Braking System # RM-8700 and its lack of air pressure. If it was working fine, the most likely cause is a loose hose, which would be something that would cause the air pressure not to build.

Additionally, according to Roadmaster, this can happen if the pressure is set to maximum. If so, the needle will have rotated around the gauge and making it look like it is at zero, which you can test by rotating it counter clockwise, as you can see by the cut out of the manual. That said, the most likely cause is going to be a loose or possibly crimped hose which is interfering so I highly recommend starting there.

expert reply by: Kyle S