Socket and Plug Tester for Trailers with 13/7 and 7/13 Adapters, No name AMI-16283/G02331

Compact tester for trailer sockets and plugs designed to verify electrical connections and signal functions. The device supports both 13-pin and 7-pin trailer systems and comes with adapters for 13→7 and 7→13 conversions, allowing inspection of tail lights, indicators, brake lights and earth continuity. The tester is intended for quick functional checks of towing electrical circuits to help identify faulty wiring or lamp failures before towing.

Advantages

The tester provides a simple, portable solution for checking trailer sockets and plugs without the need for a vehicle diagnostic tool. With included adapters, it covers the most common trailer connector standards, enabling one tool to test multiple connector types. Clear indicator layout and compact size make it suitable for workshop use and roadside checks. The tool requires no special setup and can be used by technicians and vehicle owners to confirm signal outputs and ground continuity.

Suitable for

• Workshop technicians performing routine trailer wiring checks
• Vehicle owners preparing to tow caravans, trailers or boat trailers
• Roadside verification of lights and indicators before or during towing
• Inspection of earth/ground connections and individual signal circuits

Key specifications

• Compatibility: 13-pin and 7-pin trailer connectors via included adapters
• Functions checked: tail lights, turn indicators, brake lights, ground continuity
• Power supply: draws power from vehicle trailer socket when connected
• Form factor: compact, handheld tester suitable for mobile use

How to use

Insert the tester or the appropriate adapter into the trailer socket on the vehicle, then connect the trailer plug if required to simulate load conditions. Observe the tester indicators while operating the vehicle lighting controls—turn signals, brake pedal and dipped/side lights—to confirm each circuit is functioning. If an indicator does not illuminate, inspect the corresponding wiring, fuses and bulbs for faults. Ensure the vehicle ignition or lighting circuit is in the correct position so the socket supplies power to the tester.

Usage recommendations

Use the tester on a level surface with the vehicle parked and the handbrake engaged. Avoid exposing the device to heavy moisture or prolonged direct sunlight. When diagnosing faults, check connectors for corrosion, bent pins or poor contact before replacing components. Store the adapter pieces together with the tester to ensure availability when preparing for towing.