Trailer Testers and Cleaners

This internal replacement polarized socket works with your 6139 Jump-Start Set.

Allows one person to test both male and female 7-round pin tractor-trailer plugs and more. In addition, the tester allows you to jump current to a dead circuit during emergencies so you can still drive your rig. Includes an extra jumper connector. It allows the jumping of current to a dead circuit for emergency situations so you can still drive the rig.

Test the towing circuits at the back of your truck with speed and ease. Tester is suited for older light and medium duty trucks and campers. The tester features LED lights that turn on to indicate when each circuit is working.

The Only Set of Tools to Clean Every North American Trailer Connector. The Truck and Trailer Pin Master Cleaner Set is designed for use on 4/5, 6-way round, 7-way flat (spade) and 7-way round truck and trailer electrical terminals. The unique, patented design allows for precise removal of corrosion from both male and female pins, while maintaining proper pin dimensions and is also great for cleaning butt and bullet type connectors found on most tail and side marker assemblies. Packaged in a leather-style holster with magnetic clasp, it includes custom-sized swabs for removing debris and applying the supplied contact enhancer solution.

One person can trace each lighting function on a trailer to the individual terminal it is connected to.

Test the towing circuits at the back of your truck with speed and ease. Tester is suited for older light and medium duty trucks and campers. The tester features LED lights that turn on to indicate when each circuit is working.