Trailer Light Tester 2in1 with 4 Pin and 7 Pin Compatibility Built for Reliability Made from durable polypropylene (PP) and copper materials to ensure longlasting performance in demanding automotive environments. Withstands frequent use without compromising accuracy or durability. Fast and Accurate Diagnostics Quickly test six key trailer lighting functions: tail lights, brake lights, reverse lights, turn signals, electric trailer brakes, and 12V auxiliary power. Enables immediate identification of wiring or connection issues, reducing downtime and costs. Versatile Connector Compatibility Converts a 7pin round trailer socket to a standard 4pin flat adapter in seconds. Allows easy connection and testing of different trailer types without additional tools. Dual Function Design Supports testing for both 4pin and 7pin trailer connectors in one compact unit. Simplifies routine trailer circuit checks for most trucks and towing vehicles. Practical Applications Ideal for mechanics, trailer owners, or fleet operators who need quick diagnostics before road use. Useful for verifying wiring integrity when buying or selling trailers to ensure all lights function properly. for roadside checks or regular maintenance to maintain safety compliance. Specifications Material: PP and copper Compatible Connectors: 4pin flat and 7pin round Functions Tested: Tail lights, brake lights, reverse lights, turn signals, electric trailer brakes, 12V auxiliary This tester provides a dependable, easytouse solution for maintaining trailer light performance and safety.