The "stop flow" solenoid is the most common type of solenoid. It can be installed on almost any hydraulic actuator. The 47488 is installed at the master cylinder and the brake line connects to the rear of the solenoid. The electrical wire from the solenoid is connected to the reverse lights of the tow vehicle. When the tow vehicle is put into reverse, the solenoid is activate. It stops the flow of hydraulic fluid to the brakes allowing the tow vehicle and trailer to back up.

Product Features:

Product Specifications:

NOTE: Backing up an incline may engage the brakes. If the vehicle and trailer stop on an incline and the tow vehicle is in park or out of the reverse position, the solenoid allows pressure to continue to engage the trailer brakes due to the trailer "leaning" into the tow vehicle. If backing up is continued, the solenoid will lock in the pressure to the brakes, leaving them engaged while in reverse.