{"product_id":"anderson-4-way-flat-trailer-connector-tester","title":"Anderson 4-Way Flat Trailer Connector Tester","description":"\u003ch2\u003eAnderson 4-Way Flat Trailer Connector Tester\u003c\/h2\u003e\u003cp\u003eTake the guesswork out of trailer wiring with this simple plug-in tester. It connects directly to the flat 4-way connector on your tow vehicle and uses indicator lights to confirm whether each circuit is working correctly — no multimeter or wiring diagrams required. A quick, reliable way to verify your trailer lighting system before every trip.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePlugs directly into the tow vehicle's flat 4-way connector\u003c\/li\u003e\n\u003cli\u003eIndicator lights illuminate to confirm correct electrical connections\u003c\/li\u003e\n\u003cli\u003eTests all standard 4-way flat functions: tail lights, left turn\/stop, right turn\/stop, and ground\u003c\/li\u003e\n\u003cli\u003eMeets SAE testing standards for flat 4-way trailer connectors\u003c\/li\u003e\n\u003cli\u003eCompact and easy to store in a tow vehicle or tackle box\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAny tow vehicle equipped with a standard flat 4-way trailer connector\u003c\/li\u003e\n\u003cli\u003eBoat trailers\u003c\/li\u003e\n\u003cli\u003ePersonal watercraft (PWC) trailers\u003c\/li\u003e\n\u003cli\u003eUtility, cargo, and landscape trailers\u003c\/li\u003e\n\u003cli\u003eRecreational and equipment trailers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e This tester is the fastest way to diagnose whether a trailer lighting problem is coming from the tow vehicle connector or the trailer itself. Plug it into the tow vehicle — if the lights illuminate correctly, the vehicle side is good and the fault is in the trailer wiring or lights. If the tester doesn't light up, the issue is at the vehicle connector or fuse. It's an essential tool to keep in your truck for pre-launch checks. If you find a wiring fault, the \u003ca href=\"\/products\/anderson-4-way-wishbone-trailer-wiring-harness-kit-25-ft\"\u003eAnderson 4-Way Wishbone Trailer Wiring Harness Kit\u003c\/a\u003e is a complete rewire solution, or pick up a \u003ca href=\"\/products\/4-way-flat-trailer-harness-48-car-side-for-2-wire-systems\"\u003e4-Way Flat Trailer Harness 48\" Car Side\u003c\/a\u003e or \u003ca href=\"\/products\/4-way-flat-trailer-harness-48-trailer-side-50-57901\"\u003e4-Way Flat Trailer Harness 48\" Trailer Side\u003c\/a\u003e to replace just the connector that's failing. For connector adapters, see the \u003ca href=\"\/products\/seachoice-4-pole-flat-trailer-connector-set-includes-car-side-and-trailer-side-50-13871\"\u003eSeachoice 4-Pole Flat Trailer Connector Set\u003c\/a\u003e.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51257058066468,"sku":"177-V5411","price":6.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/177-V5411.jpg?v=1786687924","url":"https:\/\/marisolmarine.com\/products\/anderson-4-way-flat-trailer-connector-tester","provider":"Marisol Marine Company","version":"1.0","type":"link"}