Pollak 12-410 4-Way Flat LED Circuit Tester for Trailer Wiring

Quickly Diagnose Trailer Wiring Issues – No Trailer Required! The Pollak 12-410 4-Way LED Tester is the ultimate time-saving tool for truck owners, fleet managers, and DIY mechanics. Designed by Pollak, an industry leader in OE towing electrical components, this compact tester allows you to instantly verify that your vehicle's 4-way flat trailer plug is functioning correctly before you ever hook up your trailer.

How It Works: Simply plug the tester into the 4-way flat socket on your towing vehicle. When you activate your turn signals, brake lights, or tail lights, the high-visibility LEDs on the tester light up to confirm the circuit is active. If a light doesn’t glow, you’ve instantly identified a vehicle-side wiring issue.

Key Features:

• Instant Verification: Tests Tail Lights, Left Turn/Brake, and Right Turn/Brake circuits.

• High-Visibility LEDs: Bright red LEDs are easy to see even in broad daylight.

• Compact & Durable: Small enough to fit in your glove box or toolbox, built with Pollak’s legendary heavy-duty construction.

• Saves Time: Eliminate the guesswork of "Is it the truck or the trailer?" by testing the vehicle side in seconds.

• Plug-and-Play: No batteries or complicated setup required; powered directly by the vehicle’s connector.

Specifications:

• Part Number: 12-410 (also known as 12-410EV)

• Connector Type: 4-Way Flat Plug

• Application: Standard 4-pole trailer wiring systems

• Packaging: Economy Blister Pack