Prevents electrical malfunctions or damage to the bike's electronic ignition, fuel injection, ABS braking systems and other sensitive electrical components Isolator draws power directly through the battery's heavy-duty wiring and fuse Isolator senses the need for power to the taillights and activates them through smaller gauge wires connected at the motorcycle taillight, allowing the motorcycle and trailer lights to be at full intensity Plug has 45" L unterminated wire leads in a loom so you can install the trailer plug of your choice (trailer plug sold separately) Plug connections are compatible with Rivco trailer wiring sub-harnesses and Rivco 5-to-4 wire converter (sold separately). WIRING ISOLATOR UNIVERSAL