Husky Towing 30178; 4 Wire Flat Trailer Wiring Tester; LED Turn Brake Taillight Indicator (Discontinued)

The Husky Towing 30178 4 wire flat trailer wiring tester is designed to quickly and easily diagnose trailer light functions without the need to connect a trailer. This compact testing tool plugs directly into a standard 4 wire flat connector, allowing users to verify proper operation of left and right turn signals, brake lights, and taillights before towing. Equipped with built-in LED indicator lights, this tester provides clear visual confirmation of electrical function. When a circuit is working correctly, the corresponding red LED will illuminate as the function is activated. This makes it easy to identify wiring issues such as faulty connections, blown fuses, or damaged wiring without guesswork or additional tools. Designed for convenience and simplicity, the Husky Towing 30178 does not require installation and is ready to use right out of the package. Its compact size makes it easy to store in a glove box, tool kit, or trailer accessory compartment for quick access when needed. This model does not include a dust cover, keeping the design straightforward and easy to operate. Ideal for routine maintenance, troubleshooting, or pre-trip safety checks, this 4 wire flat tester helps ensure trailer lighting systems are functioning properly before hitting the road. Backed by a limited 1 year warranty, the Husky Towing 30178 reflects Husky Towing’s commitment to practical design, reliable diagnostics, and dependable towing accessories.