Autocado offers the best Car & Truck Trailer Wire Tester for all your automotive needs. Our testers are designed to locate and diagnose issues in trailer wiring circuits quickly and accurately, including open grounds, bad connections, and shorts. We carry a full range of products from the industry’s most trusted brands: Autocar Wireless Trailer Light Testers, Masterdrive Automotive Wiring Analyzer And Test Kit, X-Lite Pro Circuit Diagnostic Tools, Snap-on Heavy Duty Trailer Testers - just to name a few! Get your car or truck back on the road with superior quality trailer wire testers from Autocado today!