Handheld 7-Pin Towbar & Trailer Light Diagnostic Circuit Tester (12V)

Instantly diagnose towbar and trailer wiring faults without guesswork. Designed to test standard 12V 7-pin round connectors (ISO 1724 standard), this handheld circuit tester allows you to quickly verify both sides of your towing setup—checking vehicle towbar socket output as well as trailer plug wiring integrity. Featuring clear LED indicator lights and a side test button, it pinpoint open circuits, blown fuses, faulty earth grounds, and miswired tail, brake, or indicator lights in seconds.

Key Features:

• Dual-Side Testing Capability: Features a plug on one end and a socket on the other to independently test vehicle towbar outputs and trailer light wiring harnesses.

• Instant LED Diagnostics: 6-LED display panel clearly indicates continuity and power status for left/right indicators, brake lights, tail lights, fog lights, and earth ground connection.

• Ergonomic Handheld Grip: Contoured ABS housing with finger grooves ensures a firm grip during shop or roadside diagnostic checks.

• Stand-Alone Battery Powered: Powered by an internal 9V battery (not included) to test trailer wiring directly without needing to hook up to a vehicle.

• Standard 7-Pin Fitment: Fully compatible with standard 12V 7-pin round trailer plugs and vehicle sockets across bakkies, 4x4s, caravans, and utility trailers.

Fitment Note: Standard 12V 7-pin round connection (ISO 1724). Operates on a standard 9V battery for independent trailer testing.