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SeaSense 50080310 4-Way Circuit Tester EZ Troubleshooter II for Trailer Wiring

Manufacturer

SeaSense

<h3>About SeaSense</h3><p>Since 1984, <strong>SeaSense</strong> has been one of the marine industry's most trusted names, delivering a broad lineup of reliable, affordable accessories to both weekend boaters and seasoned mariners alike. Headquartered in Urbandale, Iowa, SeaSense has spent decades rigorously developing and refining its product line — from deck hardware and cordage to safety gear, lighting, and trailer accessories — to meet the real-world demands of life on the water.</p><p>What sets SeaSense apart is its commitment to thoughtful product design. The brand pays close attention to how boaters actually interact with their gear, then engineers solutions that simplify the experience. The result is a catalog of over 700 products backed by distinctive, easy-to-navigate packaging and clear instructions that make installation and use straightforward for do-it-yourselfers and professionals alike. SeaSense has built strong relationships with more than 2,000 wholesale customers, a testament to the trust the brand has earned across the industry.</p><h3>A Complete Marine Accessories Lineup</h3><p>SeaSense covers nearly every corner of the boat, from the hull to the transom. Boaters looking to safely re-board after a swim will find purpose-built solutions in the SeaSense <a href="/200179-boarding-ladders-seasense-13414">Boarding Ladders</a> lineup, which features durable, portable designs suited to a wide variety of vessel types. For paddlers and canoeists, the brand offers a thoughtfully curated selection of <a href="/13414-seasense-paddles-200759">Paddles</a> as well as dedicated <a href="/13414-seasense-kayak-paddles-200598">Kayak Paddles</a> — both categories reflecting SeaSense's deep roots in kayak and paddle sports gear.</p><p>Below deck, SeaSense's <a href="/13414-seasense-plumbing-parts-accessories-200786">Plumbing Parts &amp; Accessories</a> keep onboard water systems running smoothly, offering components like thru-hull fittings, bilge switches, and drain plugs engineered for corrosion resistance in harsh marine environments. Rounding out their safety essentials, the SeaSense <a href="/13414-seasense-manual-bilge-pumps-200649">Manual Bilge Pumps</a> line provides a dependable, no-power-required solution for quickly evacuating water from kayaks, canoes, small powerboats, or any space where water accumulates.</p><h3>Why Boaters Trust SeaSense</h3><p>SeaSense products are designed to meet or exceed industry standards, with submersible bilge pumps, for example, certified to meet ABYC specifications. The brand's focus on affordability without sacrificing quality means boaters get reliable performance across every product category. Whether you're outfitting a fishing skiff, a recreational kayak, or a weekend cruiser, SeaSense offers the marine hardware and accessories to keep your time on the water safe, comfortable, and hassle-free.</p>

Part Number

50080310
09/11/2036 7:10 PM
Sale Price

$11.50

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The SeaSense EZ Troubleshooter II is a professional-grade circuit tester designed to quickly diagnose electrical issues in 4-way flat trailer wiring systems. This essential diagnostic tool plugs directly into your vehicle's standard 4-prong flat towing connector to verify proper power delivery to trailer lights without the need for an actual trailer connection.

Key Features:

  • Four independent green LED indicators show real-time power status for each circuit
  • Built-in male and female connectors allow inline installation—tester remains connected while towing
  • Waterproof PVC construction withstands harsh marine and outdoor environments
  • Tests turn signals (left and right), tail lights, and brake lights instantly
  • No tools required—simply plug in and operate vehicle lighting controls
  • Eliminates guesswork when troubleshooting trailer lighting problems

This circuit tester is ideal for boat trailers, utility trailers, and small cargo trailers using standard 4-way flat wiring systems. The pass-through design means you can verify circuits before each trip without disconnecting the tester, saving valuable time during pre-tow safety checks. Essential for anyone who regularly tows trailers and needs to quickly identify wiring faults at the vehicle connector.

it was quick and easy

Satisfied. I have only one sour thing to say: the parts I received were made in China. I hope they last as long as the originals which was 330,000 miles.

Great prices! Had exactly what I was looking for, for $20 less than anywhere else even with the shipping cost added in.

good!

Ok

So far so good

Good

Very easy purchase experience, new battery for my 2008 Prius fit perfectly! Hassle free, good price!

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