My controller was working ok, but now the light stays on on the controller. That keeps the cruise control from working even when the trailer is not hooked up. Is there an adjustment on the brake pedal to take care of this?

 

aftermarket or factory brake controller?

if the light your are referring to is the light that comes on when the brake pedal is applied...maybe the brake on/off switch is nfg. unplug the brake controller and if the cruise problem is still there...its not the controller.