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Safety Brake Set systems decrease trailer theft by locking the trailer brakes until either
a key or a keypad code is entered to allow the brakes to be released. Air and a 12-volt
source must be connected at the time the key or keypad code is used. Once the brakes are
released they work normally until the electrical supply is disconnected and the trailer
parking brake is again set. If the brakes are released mechanically and the 12-volt is
connected, the lights will be in operative and flash on and off.
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