brake controller

alvan

Member
Anyone know how to hook a electric brake controller up on a semi with air brakes.Thanks for any info.
 
brake controllers have four wires to hook up
12 volt hot from battery
12 volt to ground
12 volt from brake light circuit
12 volt to trailer brakes
air or hydraulic brakes wire the same
good luck
Ron
 
i had mine hooked up on brake pressure switch but when i put four ways on when it flashes it puts trailer brakes on.
 
I wonder how many flashers out there are flashing the trailer brakes!!! I suppose you could put a diode in the truck brake wire leaving the switch to prevent it from back feeding the controller as well.
 
I have my 12 volt from the brake switch on a dash switch so I can turn off the controller when I have a air brake trailer on or when I'm parked building air so I don't have the electric brakes buzzing on the trailer.
 

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