SeaSense 50080304 4-Way Trailer Circuit Tester EZ Troubleshooter

The SeaSense EZ Troubleshooter is a simple, effective tool for diagnosing electrical issues in your trailer's lighting system. This 4-way circuit tester plugs directly into your vehicle's standard 4-prong flat towing connector to quickly verify power flow to turn signals, running lights, and brake lights.

Key Features:

• Easy plug-in design works with conventional 4-prong flat trailer connectors
• Individual green LED indicators for each circuit show when power is present
• Quickly diagnose wiring faults without disconnecting the trailer
• Waterproof PVC construction withstands outdoor use and weather exposure
• Compact design for convenient storage in your vehicle or toolbox

To use, simply plug the tester into your vehicle's trailer connector, then activate each lighting function (turn signals, running lights, brakes) one at a time. The corresponding green light will illuminate when that circuit is receiving power, making it easy to pinpoint wiring problems, blown fuses, or faulty connections before hitting the road.