{"product_id":"trailer-light-wire-circuit-tester-4-pin-trailer-tester-connector-circuit-functions-brake-signal-trailer-plug-tester-auto-part","title":"4-Pin Flat Trailer Light Circuit Tester","description":"\u003cp\u003eCheck the lighting signals at a compatible four-pin flat trailer connection with a compact plug-in tester. LEDs provide a visible indication while the vehicle's functions are operated.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCheck at the connector\u003c\/strong\u003e - the tester plugs into a matching four-way flat arrangement.\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eSee separate signal indications\u003c\/strong\u003e - LEDs respond as the relevant functions are operated.\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eKeep a small diagnostic accessory\u003c\/strong\u003e - the compact body fits with vehicle tools.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCheck the Tow Connection Before Chasing a Fault\u003c\/h2\u003e\u003cp\u003eUse the tester with the vehicle secured and the connector correctly matched. Operate the lights and indicators as instructed, observing which signals appear at the test point.\u003c\/p\u003e\u003cp\u003eAn LED indication is not a complete load test or proof that all trailer wiring is sound. Confirm the US-style four-pin flat format; it does not directly replace European 7- or 13-pin testing equipment.\u003c\/p\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Scf554d2fc76446cb8eb1136a25766c6cw.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S9de8ad5338a74b1794af81e040be62f3v.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S6136cfb179a24347b5703d7c51cd56ecn.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S1425516b3f5c42d287a4ce1429606139a.jpg\" slate-data-type=\"image\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sc657b0fd9c874b56bcd46bf067b7fd54f.jpg\" slate-data-type=\"image\"\u003e\u003ch3\u003eTechnical details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConnector: US-style 4-pin flat.\u003c\/li\u003e\n\u003cli\u003eIndicators: LEDs.\u003c\/li\u003e\n\u003cli\u003eBody: ABS plastic.\u003c\/li\u003e\n\u003cli\u003eColour: black.\u003c\/li\u003e\n\u003cli\u003ePackage: one tester.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eAdd a connector-level check to your trailer-light diagnosis.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Spy-shop.com","offers":[{"title":"black","offer_id":64107702714698,"sku":"1005009014457795-black","price":22.87,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/5980\/2954\/files\/Sadf6525a2f40449699950305e363e432p.webp?v=1793034139","url":"https:\/\/spy-shop.com\/products\/trailer-light-wire-circuit-tester-4-pin-trailer-tester-connector-circuit-functions-brake-signal-trailer-plug-tester-auto-part","provider":"Spy-shop.com","version":"1.0","type":"link"}