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7 Way Blade & 4 Pin Trailer Light Circuit Tester with LED Indicators 6 Function Light Tester for RV Truck Vehicle Side Trailer Socket Tester

Note 1: The trailer tester will upside down when testing for 2017 Newer Ford/GMC/Chevy model; Note 2: 7 pin trailer plug tester is unable to test LED lighting system; Note 3: Doesn't work with vehicle has a lamp-out sensor, such as BMW, VW, Audi, Mercedes-Benz, Porsche etc.
2 in 1 Design: This trailer light tester combines both 4 way circuit tester and 7 way trailer light tester, allows you to test both the 4 pin and the 7 blade connectors; Easy and quick to test trailer circuits on most trucks
6 Light Functions: Versatile trailer wiring tester can be used to test 6 separate trailer light functions, quickly confirm the functionality of taillights, brake lights, reverse lights, turn signals, electric trailer brakes and 12V auxiliary power on your vehicle
Bright LED Indicators: Plug in 4 way and 7 way trailer light tester equips a LED light for each electrical function; Plugging the light tester and check, you can easily read the green LEDs and find out which wiring has a problem
Durable Construction: For long-lasting use, this 7 blade RV trailer tester is made from durable ABS plastic, which will never rust or corrode, Tin-Plated copper terminals makes great conductivity
Simple to Use: No batteries or wiring needed! 7 Blade & 4 Pin Tester is easy to use, ergonomic design is convenient for plugging in or unplugging; Widely used to test trailer light circuits on most Trucks, Boats, Trailers Campers, Caravans, Food Vans and other Towed Vehicles

Overview

Specs

Reviews

Type
Type	Electrical Measurement Device

Additional Information
First Listed on Newegg	August 11, 2026

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
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