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2. Trailer brake controller - Wikipedia

   en.wikipedia.org/wiki/Trailer_brake_controller

   Smaller trailers may not contain trailer brakes (for example, basic 4-by-8-foot or 1.2-by-2.4-metre utility trailers). It is recommended that, if the total trailer weight is over a couple thousand kilograms, the trailer have some sort of braking system, and the tow vehicle be equipped with a brake controller.

3. Trailer connectors in North America - Wikipedia

   en.wikipedia.org/wiki/Trailer_connectors_in...

   Note that the diodes have to be able to handle high currents or that they are used to control a relay which in turn feeds the trailer. If you have a trailer with a lot of lights the diode and relay wiring is preferred, but if you have a trailer with a simple light arrangement it is usually sufficient to wire to 58L.

4. Overrun brake - Wikipedia

   en.wikipedia.org/wiki/Overrun_brake

   An overrun brake (called a surge brake when invented) is a brake system commonly used on small trailers, where the motion of the trailer with respect to the towing vehicle is used to actuate the brake. The early systems were fitted with a spring system which was not very effective.

5. Relay valve - Wikipedia

   en.wikipedia.org/wiki/Relay_valve

   A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle ...

6. Boom brake - Wikipedia

   en.wikipedia.org/wiki/Boom_Brake

   The brake shackles to the bottom of the boom, and the line attaches to the base of the shrouds; tensioning the line actuates the brake. A boom brake is a device designed to control the swing of the boom on a sailboat. The boom brake acts as a preventer when sailing downwind, and can also be used to jibe(US) or gybe(UK) the mainsail in a slow ...

7. Air brake (road vehicle) - Wikipedia

   en.wikipedia.org/wiki/Air_brake_(road_vehicle)

   The trailer brake consists of a direct two-line system: the supply line and the separate control or service line. The supply line receives air from the prime mover park brake air tank via a park brake relay valve and the control line is regulated via the trailer-brake relay valve. The operating signals for the relay are provided by the prime ...