True MODS 4-Pin Flat Trailer Light Wiring Circuit Tester
$7.50
Skip to product information
Quickly diagnose trailer light issues with this professional-grade 4-pin circuit tester. Identify open circuits, shorts, and ground faults in seconds without disconnecting wires. Features a bright LED indicator and durable flat-pin connectors compatible with standard trailer plugs. Essential tool for RV owners, mechanics, and anyone towing. Reliable troubleshooting at your fingertips.
True MODS 4-Pin Flat Trailer Light Wiring Circuit Tester
$7.50