Test, Clean & Restore 7 Round Pin Connections.
- Tests tractor electrical circuit
- Tests trailer lights including turning light signals, brake lights and more!
- Removes corrosion from truck and trailer connectors
- Enhances electrical contact points
- Extends harness life
- Use as a pin wear gauge
- Kit includes: Round Pin Tractor Trailer Circuit Checker, 7 Round Pin Cleaner, and 2 ml DeoxIT® Cleaner
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