Kuryakyn 4-Wire Trailer Wiring & Relay Harness for '18-21 Honda GL1800 (2990)

Safely and effectively apply the load from your trailer lighting to the battery and not to the rest of the bike's electrical system.

• Eliminate overloading stock lighting or accessory circuits.
• Our relay harness utilizes inputs from the motorcycle to direct power from the battery to the appropriate trailer lighting circuit.
• 4-Wire Kits include a flat-4 connector, 5-Wire kits do not include Receptacle Kits because the style of receptacle required varies by trailer manufacturer.