3536B7-WAY Blade & 4 Flat Connector Tester


This is a tester to test the function of the 7 way connector of the vehicle. User simply plug the tester with the 7 way or 4 way connector, and switch on the corresponding function of the vehicle to check if the LED indication has lighted up correctly. Use in the garages, workshops where there is a need to check the configuration of circuit. Widely used to test trailer light circuits on most trucks, boats, trailer campers, caravans, food trucks and other trailers.


  • 2 in 1 design, which combines a 4-way circuit tester and a 7-way trailer light tester, allowing you to test 4-pin and 7-blade connectors.
  • The trailer plug tester is extremely easy and convenient to use.
  • Test 6 LED lights for proper function.
  • No Batteries Required.