This tester has one side to connect the 7-pins plug of a trailer and another side to connect the 7-pins socket of a car. This tester indicates quickly if a failure concerns the wiring of the car or the wiring of the trailer.
eBay
GTRIC Waterproof Outdoor Plug Electrical Sockets 250V AC IP66 DustProof Waterproof Socket With Switch Outside Master Plug
Aliexpress UK
This tester is for a trailer/caravan and tow bar socket/plug checker. To do this, you simply have to insert the tester into the socket or plug to be tested, press the test button and a clear diagnosis is made via the LED display.
eBay
Multifunction AU US UK EU German France Brazil Swiss Italy outdoor waterproof socket with bottom box industry AC power socket
Aliexpress UK
Automotive7Pin to 13Pin Towing Trailer Tow Bar Caravan Light Wiring Circuit Tester Plug Socket UK. This tester is for a trailer/caravan and tow bar socket/plug checker. -Just plug the tester in the 7 pin socket or the 7 pin plug of the trailer or caravan and press the yellow button on the side of the tester.
eBay
Eu Black Conversion Plug Multifunctional Expansion Socket Multifunctional Converter One To Many Travel Socket With Night Light
Aliexpress UK
Automotive7Pin to 13Pin Towing Trailer Tow Bar Caravan Light Wiring Circuit Tester Plug Socket UK. 1 Piece Trailer Plug Socket Tester. -Just plug the tester in the 7 pin socket or the 7 pin plug of the trailer or caravan and press the yellow button on the side of the tester.
eBay
FC-6P FC-8P FC-10P FC-14P FC-16P To FC-40P IDC Socket 2x5 Pin Dual Row Pitch 2.54mm IDC Connector 10-Pin Cable Socket
Aliexpress UK
This12V 7 Pin Trailer Lights Plug & Socket Wiring Circuit Tester is designed for testing the lighting circuits on both towing vehicles and trailers/caravans etc. 12V electrical trailer plug & socket wiring tester.
eBay
FI-03G 24K Gold Plated IEC AC Inlet IEC input socket with Solder HIFI Socket with fuse
Aliexpress UK
This tester is for a trailer/caravan and tow bar socket/plug checker. Automotive 13 Pin Towing Trailer Tow Bar Caravan Light Wiring Circuit Tester Plug Socket UK. To do this, you simply have to insert the tester into the socket or plug to be tested, press the test button and a clear diagnosis is made via the LED display.
eBay
1PC RG316 RF Coaxial Cable SMA Male Plug to Dual Alligator Clips Red&Black Tester Lead Wire 50cm Connector
Aliexpress UK
Manufacturer Part Number: 1805B. 13 Pin towbar socket tester is perfect for checking all electrical circuits are working correctly after installation and before towing. Fitted with approx. 3.5m cable to allow testing while seated in the driver's seat.
eBay
NOYAFA NF-8508 Network Cable Tester PoE Checker belt Optical Power Meter LCD Display Measure Length Wiremap Cable Tracker
Aliexpress UK
Automotive7Pin to 13Pin Towing Trailer Tow Bar Caravan Light Wiring Circuit Tester Plug Socket UK. 1 Piece Trailer Plug Socket Tester. -Just plug the tester in the 7 pin socket or the 7 pin plug of the trailer or caravan and press the yellow button on the side of the tester.
eBay
Noyafa NF-919 3 in1 Fiber Optical Meter Visual Fault Locator REF/OPM Power Meter Red Light Fiber Optic Cable Tester Network Tool
Aliexpress UK