Designed for one-person operation, this trailer circuit tester kit checks 4 5 6 and 7-way connections by plugging into the vehicle side socket. The 5-piece set includes 7-way flat and round pin testers, a 6-way round pin tester, a 4/5 pin harness checker, and a 3-way adapter. Moreover, integrated LEDs indicate that each circuit is working to eliminate guesswork during the testing process.

Designed for one-person operation, this trailer circuit tester kit checks 4 5 6 and 7-way connections by plugging into the vehicle side socket. The 5-piece set includes 7-way flat and round pin testers, a 6-way round pin tester, a 4/5 pin harness checker, and a 3-way adapter. Moreover, integrated LEDs indicate that each circuit is working to eliminate guesswork during the testing process.