Forum Discussion

bkick's avatar
bkick
Explorer
Oct 09, 2014

Elect Brake Problem

I found that only one brake works when putting brakes on by pushing the brake pedal. All brakes work if I push the bar on controller. Have new controller and have checked all magnets, replaced one that was grease coated due to seal failure. Test light barley lights when brakes are applied. Found on broken wire truck side of connecter, repaired but make no difference.

Any ideas
  • Bob/Olallawa wrote:
    ScottG wrote:
    That's not possible. No matter how you actuate the trailer brakes the energy goes down the same single wire into the trailer where it's sent to each wheel. So using the brake pedal or using the bar does the same thing and there's no way one can actuate select wheels.


    In a perfect world that might be true. How much power is he sending down the wire and what shape are the plugs and trailer wiring.


    True but there's nothing in the trailer wiring that could disseminate between pressing the brake pedal and using the bar on the controller to cause different wheels to brake.
  • Take a look underneath and see if a wire has chafed. This is especially problematic with series wired brake systems where the brake wires are led through an axle or not secured correctly. If you really want to get the power to each brake, rewire the brakes in a Star configuration, two wires from each wheel led to a junction terminal on the tongue and your primary brake wire from the umbilical connected to those individual supply wires. This will get more juice to each brake assembly and is easier to diagnose a brake problem if you have one.

    Good luck with the brakes.
  • ScottG wrote:
    That's not possible. No matter how you actuate the trailer brakes the energy goes down the same single wire into the trailer where it's sent to each wheel. So using the brake pedal or using the bar does the same thing and there's no way one can actuate select wheels.


    In a perfect world that might be true. How much power is he sending down the wire and what shape are the plugs and trailer wiring.
  • That's not possible. No matter how you actuate the trailer brakes the energy goes down the same single wire into the trailer where it's sent to each wheel. So using the brake pedal or using the bar does the same thing and there's no way one can actuate select wheels.
  • Bad ground, mis adjusted brakes, mis adjusted controller are my first three guesses.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,203 PostsLatest Activity: Feb 22, 2025