What is the purpose of a breakaway switch?

The purpose of a breakaway switch is to apply brakes on a trailer in the event that it becomes detached or releases from the towing vehicle. This safety feature is crucial because it helps prevent the trailer from rolling away uncontrollably, potentially causing accidents or endangering lives. When the trailer separates from the towing vehicle, the breakaway switch activates the trailer's brake system, allowing it to stop safely. This mechanism is particularly important for trailers that carry heavy loads, as uncontrolled movement could lead to significant hazards on the road.

Other options, such as enabling remote access or signaling for assistance, do not align with the primary safety functions that a breakaway switch serves. Locking the trailer in place also does not pertain to the function of a breakaway switch, further reinforcing that the main objective of this feature is to enhance safety by preventing runaway trailers.