Nilight 4 Way Flat Trailer Wiring Circuit Tester Male End Wire 4 Pin Test with Bright Light Indicator for Turn Signal Brake Tail Lights Trouble Shooting
4 Way Trailer Tester: Using this 4 pin trailer plug tester to confirm proper function of your vehicle's trailer wiring harness. Excellent for diagnosing trailer light issues, lets you know where in the system there is a problem instead of guessing
No Tool Needed: Plug-n-play design, the 4 pin trailer plug tester is easy to use, just plug the tester into the 4 pin flat trailer connector on your tow vehicle and trailer to test taillights and turn signals for proper operation
Bright LED Indicators: This 4-way trailer circuit tester features a LED light for each electrical functions, turn on the lights and check, you can easily read the LEDs and find out which wiring has a problem
Durable Construction: 4 pin trailer socket tester is made from durable ABS plastic. Designed to be weather, corrosion, and impact resistant for years of reliable service. Tin-Plated copper terminals makes great conductivity
Compact Design: Small size trailer plug tester is convenient for storage, allows you store in your tool box, glove compartment or anywhere to be ready when you need it. You can leave it plugged in or store it conveniently in your glove box, door pocket, or tool box
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