Adapt your motorcycle’s five wire system to power a four wire trailer system. If the trailer you want to tow has a four wire system (combined brake and turn signal bulbs) you will also need a five to four wire converter in line before the isolator.
This product must be used when adapting a trailer with a 4 wire system to any motorcycle, which all use a 5 wire system.

RIVCO Mirrors with LED turn signals.

