{"product_id":"electric-trailer-brakes-12-x-2-pair-replacement-kit-12-741e","title":"Pollak 12-741 7-Way RV Blade LED Circuit Tester for Vehicle Socket (12-741E)","description":"\u003cstyle\u003e\n  .rp-mag-lock{\n    --rp-black:#111111;\n    --rp-charcoal:#1d1d1f;\n    --rp-gray:#6b7280;\n    --rp-light:#f5f5f5;\n    --rp-line:#d8d8d8;\n    --rp-maroon:#6e0f11;\n    --rp-gold:#d7a126;\n    --rp-cream:#fff7e3;\n    --rp-shadow:0 16px 36px rgba(0,0,0,.08);\n    --rp-radius:20px;\n    font-family:\"Helvetica Neue\",Helvetica,Arial,sans-serif;\n    color:var(--rp-black);\n    line-height:1.6;\n  }\n\n  .rp-mag-lock *{\n    box-sizing:border-box;\n  }\n\n  .rp-mag-lock .rp-shell{\n    max-width:1080px;\n    margin:0 auto;\n    padding:28px 18px 40px 18px;\n    background:\n      linear-gradient(180deg,#fafafa 0%,#ffffff 22%,#ffffff 100%);\n  }\n\n  .rp-mag-lock .rp-hero{\n    position:relative;\n    overflow:hidden;\n    border:1px solid #ececec;\n    border-radius:28px;\n    padding:30px 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}\n\n    .rp-mag-lock .rp-title{\n      font-size:24px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"rp-mag-lock\"\u003e\n\u003cdiv class=\"rp-shell\"\u003e\n\u003cdiv class=\"rp-hero\"\u003e\n\u003cdiv class=\"rp-logo\"\u003e\u003cimg alt=\"R \u0026amp; P Carriages\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2659\/6148\/files\/LOGO-FINALx200.png?v=1763669885\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rp-kicker\"\u003eVehicle \/ Trailer Wiring \u0026amp; Electrical\u003c\/div\u003e\n\u003ch1 class=\"rp-title\"\u003ePollak 12-741 7-Way RV Blade LED Circuit Tester for Vehicle Socket\u003c\/h1\u003e\n\u003cp class=\"rp-subhead\"\u003eCheck your tow vehicle’s 7-way before you hook up and head out. This compact Pollak tester gives you a fast visual read on key trailer wiring functions so you can diagnose a dead circuit before it becomes a road trip problem.\u003c\/p\u003e\n\u003cdiv class=\"rp-partline\"\u003e\n\u003cspan class=\"rp-badge\"\u003ePart Number: 12-741\u003c\/span\u003e \u003cspan class=\"rp-badge alt\"\u003e7-Way RV Blade Vehicle-End Tester\u003c\/span\u003e \u003cspan class=\"rp-badge alt\"\u003e12V LED Circuit Check\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section rp-grid-2\"\u003e\n\u003cdiv class=\"rp-card\"\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cp class=\"rp-lead\"\u003eThe Pollak 12-741 is a 7-way RV blade LED circuit tester built for the vehicle-side socket. Plug it into a standard 7-way RV blade connector and verify the presence of reverse, right turn \/ brake, left turn \/ brake, taillight, brake controller output, and 12V auxiliary power signals. It is a smart first step when trailer lights, brake controller output, or power feed issues need to be isolated quickly.\u003c\/p\u003e\n\u003cdiv class=\"rp-video-shell\"\u003e\u003ciframe title=\"Pollak 12-741 7-Way RV Blade LED Circuit Tester Video\" src=\"https:\/\/www.youtube.com\/embed\/1NM3wZgxpDg?autoplay=1\u0026amp;mute=1\u0026amp;playsinline=1\u0026amp;rel=0\u0026amp;modestbranding=1\u0026amp;controls=1\" height=\"315\" width=\"560\"\u003e\n          \u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv class=\"rp-video-note\"\u003eIf your browser blocks autoplay, use the player controls above or \u003ca rel=\"noopener\" href=\"https:\/\/youtu.be\/1NM3wZgxpDg\" target=\"_blank\"\u003ewatch on YouTube\u003c\/a\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-card rp-service\"\u003e\n\u003ch2\u003eQuick Tech Specs\u003c\/h2\u003e\n\u003cdiv class=\"rp-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector Style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7-way RV blade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUse Position\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVehicle-end socket tester\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-impact plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction LEDs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBU, RT, TM, LT, BK, 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCross References\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12-741, 12-741E, replaces 12-741EV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-card rp-knowledge\"\u003e\n\u003ch2\u003eR\u0026amp;P Knowledge Hub\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for standard 7-way RV blade vehicle sockets. This is not the round-pin 7-way tester.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle \/ System Fit:\u003c\/strong\u003e Best for checking the tow vehicle’s 7-way connector before trailer hookup or during wiring troubleshooting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Notes:\u003c\/strong\u003e Plug the tester into the vehicle socket, activate the relevant lighting or power function, and verify that the matching LED illuminates. Confirm you are working with a standard RV blade socket before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Insight:\u003c\/strong\u003e This tester is excellent for quick function checks, but it is not a load tester. It helps confirm signal presence fast, which can save time when you are separating a vehicle-side problem from a trailer-side problem.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-card rp-service\"\u003e\n\u003ch2\u003eR\u0026amp;P Repair Insight\u003c\/h2\u003e\n\u003cp\u003eWhen a customer says “the trailer lights quit” or “the brake controller is not talking to the trailer,” the first question is whether the tow vehicle is actually sending the signal. This tester helps answer that immediately and can keep you from chasing the wrong side of the system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the Socket Style:\u003c\/strong\u003e This unit is for the 7-way RV blade format, not a 7-way round-pin socket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the Vehicle Side First:\u003c\/strong\u003e If the LEDs do not respond correctly here, diagnose the tow vehicle socket and wiring before replacing trailer-side components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Sensitive Tow Systems:\u003c\/strong\u003e Some newer vehicles with trailer detection or low-draw sensitivity may need a loaded adapter for deeper testing beyond a simple LED function check.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature-grid\"\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003eFast Visual Circuit Check\u003c\/h3\u003e\n\u003cp\u003eLED indicators let you confirm key tow functions at a glance so you can spot a missing circuit before connecting the trailer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003eBuilt for 7-Way RV Blade Sockets\u003c\/h3\u003e\n\u003cp\u003eMade for the common RV-style blade connector used on many tow vehicles, pickups, SUVs, and trailer-ready rigs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003eLabeled Function Codes\u003c\/h3\u003e\n\u003cp\u003eThe tester clearly marks BU, RT, TM, LT, BK, and 12V so you can match each illuminated LED to the correct function quickly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003eShop-Useful, Road-Useful Tool\u003c\/h3\u003e\n\u003cp\u003eCompact, simple, and easy to keep in the truck or toolbox for pre-tow checks, intake inspections, and wiring diagnosis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section rp-grid-2\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12-741\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLED circuit tester\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard 7-way RV blade vehicle socket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-impact plastic, black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVehicle-end 7-way RV blade connector systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction Indicators\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBU, RT, TM, LT, BK, 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlternate References\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12-741E; replaces 12-741EV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eFitment \/ Application\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle \/ System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTow vehicle 7-way RV blade socket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVehicle-side function testing for trailer lighting, brake output, reverse, and 12V auxiliary feed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSecondary Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUseful for shop diagnosis, pre-trip trailer hookup checks, and wiring verification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVerify connector style before ordering. This tester is for RV blade sockets and is not intended to replace a full load-based electrical diagnosis.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eIncluded Components\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003ePollak 12-741 7-way RV blade LED circuit tester\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt In\u003c\/td\u003e\n\u003ctd\u003eLabeled LED function indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt In\u003c\/td\u003e\n\u003ctd\u003eTwo pull tabs for removal from the socket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNot Included\u003c\/td\u003e\n\u003ctd\u003eTrailer plug, adapter, or additional wiring hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-note\"\u003eVerify connector style, application, and expected circuit function before purchase or diagnosis. For best results, use this tester as a fast vehicle-side signal check before moving on to deeper trailer or wiring repairs.\u003c\/div\u003e\n\u003cdiv class=\"rp-cta-wrap\"\u003e\u003ca href=\"https:\/\/needatrailerpart.com\/search?q=7-way%20wiring%20tester%20plug%20adapter\" class=\"rp-btn\"\u003eShop 7-Way Wiring, Plugs \u0026amp; Testers\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"rp-seo\"\u003ePollak 12-741 12-741E 12-741EV 7-way RV blade LED circuit tester vehicle socket tester 7-pole trailer wiring tester tow vehicle plug tester brake controller output tester reverse light tester 12 volt trailer wiring diagnostic tool\u003c\/div\u003e\n\u003cdiv class=\"rp-footer\"\u003e\u003cimg alt=\"R \u0026amp; P Carriages\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2659\/6148\/files\/Baseball_AdvertisingRP-sign_1.jpg?v=1771533480\"\u003e\u003c\/div\u003e\n\u003chr style=\"border: 0; border-top: 1px solid #eee; margin: 24px 0 0 0;\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Need a Trailer Part","offers":[{"title":"Default Title","offer_id":50769594646814,"sku":"12-741E","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2659\/6148\/files\/12-741E_Circuit_Tester_Trailer_Wiring_7-Blade_Bulk-_cover.png?v=1776519029","url":"https:\/\/needatrailerpart.com\/products\/electric-trailer-brakes-12-x-2-pair-replacement-kit-12-741e","provider":"Need a Trailer Part","version":"1.0","type":"link"}