Unlike drum brakes, disc brakes generate full braking power in reverse. If your brake actuator does not have a manual lock out lever or switch a solenoid will need to be installed.
Champion Trailers does not recommend the use of a manual lock out pin for safety reasons.
This solenoid is typically used in flat terrain.
The blocking solenoid is a straight in line solenoid and does not have a return port back to the master cylinder
The 12 volt solenoid valve connects to the tow vehicles back up light circuit for automatic brake lockout. The solenoid can be wired independently or adapted to trailer wire harness with a 5-flat plug on trailer and tow vehicle.
Thread size on the solenoid is 3/16" x 1/8"