As motorcycles get more complex with electronic ignitions, fuel injection, ABS braking and other sensitive electronics, isolating electronics between your motorcycle and trailer is critical for safe riding.

Big Bike Parts® Electronically Isolated Trailer Harnesses for the Honda Goldwing and the Can-Am Spyder have set the standard for trailer to bike protection for years. This same Electronically Isolated Trailer Wire Harness is now available as a Universal fitment for all other motorcycles. Electronic backflow is eliminated with heavy duty self-setting relays to protect your motorcycle. This five wire system provides direct connection for running, brake, left turn signal, right turn signal and ground. Weather resistant gel sealed splice connectors are included to make an easy and durable connection for long term use. Designed for use on Harleys, Yamahas and other great trailer pulling vehicles.

Trailer Wire Harness, Universal Fitment, Heavy Duty Relay Switches