7-Way Round Pin Tractor Plug Tester Trailer Circuit Tractor Trailer #7865L

About This Tester

This 7-way round-pin tractor-trailer circuit tester is designed for quick electrical checks on semi tractors and trailers. It helps diagnose turn-signal, hazard-light, brake-light and other trailer-circuit problems at the connector.

Compatibility

Designed for tractor-trailer / semi-truck 7-way round-pin connectors.

This tester is not designed for standard passenger pickup-truck 7-way connectors. Tractor-trailer and passenger-truck plug pin styles differ, so please compare your connector before ordering.

Key Uses

• Test electrical output from the tractor 7-way connector
• Check semi-trailer light cords and trailer plugs
• Diagnose turn-signal, hazard-light and brake-light circuit faults
• Help isolate problems involving lights, cables or connectors
• Useful for routine service, fleet checks and trailer inspections

Reference

Replacement/reference number: 7865L.