Oyviny 7 Way Blade & 5/4 Pin Trailer Light Tester with LED Indicators for RV Truck Trailer

This trailer light tester combines both 5-way circuit tester and 7-way trailer light tester, allowing you to test the 4-pin flat, 5-pin flat, and 7-blade connectors. With its 3-in-1 design, it is easy and quick to test trailer circuits on most trucks. The upgraded double-sided design enables you to read the LEDs from both the top and bottom sides.

⚠️⚠️⚠️ Please note that this trailer tester does NOT work with vehicles that have a lamp-out sensor, such as 2020+ GMC, Chevrolet, BMW, VW, Audi, Mercedes-Benz, Porsche, and others.

The 7-way RV trailer tester can also be used as a 7-way to 5-way trailer adapter, converting the vehicle-side 7-pin output to a 5-pin flat adapter to connect the 5-way or 4-way trailer light plug.

This versatile trailer wiring tester can be used to test 6 separate trailer light functions, allowing you to quickly confirm the functionality of taillights, brake lights, reverse lights, turn signals, electric trailer brakes, and 12V auxiliary power on your vehicle.

The trailer light tester is equipped with bright LED indicators. Plugging in the 5-way and 7-way trailer light tester, you can easily read the green LEDs and identify which wiring has a problem.

For long-lasting use, this 7-blade RV trailer tester is made from durable ABS plastic, which will never rust or corrode. The tin-plated copper terminals ensure great conductivity.

The 7-blade & 5-pin tester is simple to use, with no batteries or wiring needed. Its ergonomic design makes it convenient for plugging in or unplugging. This tester is widely used to test trailer light circuits on most trucks, boats, trailers, campers, caravans, food vans, and other towed vehicles.

Oyviny Tester Comparison Table:

Product: 3-in-1 Design Trailer Tester Function 1: Testing 7-way Blade Connector Function 2: Testing 5-way / 4-way Flat Adapter Function 3: 12V Cigarette Lighter Socket Provides Charging Test Light Function: 6 Functions Plug and Play: ✔

Product: 2-in-1 Design Trailer Tester Function 1: Testing 7-way Blade Connector Function 2: Testing 4-way Flat Adapter Test Light Function: 6 Functions Plug and Play: ✔

Product: 7-pin Plug Tester Customer Reviews: 3.7 out of 5 stars (39) Price: $11.99 Test Function: 6 Functions Product Design: 7-way Light Tester

Product: Double End 5-pin Tester Customer Reviews: 3.7 out of 5 stars (12) Price: $11.99 Test Function: 4 Functions Product Design: 5-pin Male and Female Tester

Product: Double End 4-pin Tester Customer Reviews: 4.6 out of 5 stars (119) Price: $12.99 Test Function: 3 Functions Product Design: 4-pin Male and Female Tester

Product: 4-pin Tester Customer Reviews: 4.5 out of 5 stars (252) Price: $9.99 Test Function: 3 Functions Product Design: 4-way Flat Circuit Tester

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