Quickly test, clean and repair truck and trailer electrical connections

Preventative maintenance on your trailer goes a long way toward increasing safety and saving money. This towing maintenance kit allows you to quickly test, clean and repair truck and trailer electrical connections to make sure everything is working properly. Each kit includes a connector cleaner to precisely clean away corrosion, a trailer harness tester to locate any faulty circuits and 2ml DeoxIT® cleaner to improve the quality of the electrical connections. For 4/5 pin trailer connections.