Everywhere I have read is the each brake magnet will pull 3AMPS when 12VDC is applied... One axle this will be 6AMPS - Two axles it will be 12AMPS DC Current.
Also on my fifth wheel I can hear a low tone if I have my ears up close to the brakes when they are activated. On my POPUP trailer I do not hear any audible tones.
The compass idea also works great too... Just hold the compass up close to brake magnet on the outside of the wheel and it deflects big time when the brake magnet has DC VOLTAGE applied to it.
DO not expect to hear the brakes working with the wheel jacked up and sitting still. On my two trailers I have to turn the wheel about a quarter turn to have the electric brakes engage when the electric brakes Dc VOLTAGE has been applied. There is some sort of mechanical action required to make them work with the moving brake drum.
On inspection one time I thought my brakes were not working as well and when I moved the wheel about a quarter turn the brakes engaged on the wheel I had jacked up.
Roy ken
