Troubleshooting a Non-Functioning Air Compressor on a BrakeMaster Second Motorhome Kit

Updated 05/06/2017 | Published 05/02/2017

Question:

I have brakemaster 9060 which the air pump does not work on my motorhome, It did work fine, but it does not pump up air so nothing works. I have 12 volts going to relay. I dont find any fuses in the line. If there is a wiring diagram it would help.

asked by: Jerry R

Expert Reply:

In the installation instructions for the Roadmaster BrakeMaster 9060, # RM-98300, they show two fuses wired in to the air compressor circuit. One 20 amp fuse on the power wire of the battery and a 10 amp fuse connected on the blue wire that runs from the ignition switch to the air compressor.

Inspect these fuses and any poor or loose wiring connections. If possible use an external 12-volt source to connect to the compressor to see if it operates. If the compressor works, then the issue is along the wiring. If the compressor does not work, then there may be an issue with the unit itself.

I have attached the wiring diagram to this page.

expert reply by: Jared P