{"title":"4-Way or 4-Pin Flat Trailer Harnesses","description":"","products":[{"product_id":"4-pole-flat-connector-trailer-end-48-wires","title":"4-Pole Flat Connector, Trailer End, 48\" Wires","description":"4 Pole Flat Connector and Wiring, Trailer End, 48\" Wires. \n \nFeatures: \n \nWire your trailer with this universal, splice-in wiring harness so that you can connect the trailer's wiring to your vehicle's during towing \nDesigned for use with 2-wire electrical systems \n4-Pole flat trailer-end connector plugs into the 4-way flat on your tow vehicle \nColor-coded wires allow for simple hardwiring to existing trailer connections \n \n58032 Curt Wiring Harness with 4-Pole Flat Trailer Connector - Trailer End - 48\" Long","brand":"eTrailer","offers":[{"title":"Default Title","offer_id":53080820154732,"sku":"C97NR , 58032","price":6.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/1889-220.lg.jpg?v=1768584046"},{"product_id":"4-way-4-pole-flat-connector-trailer-end-18-wires","title":"4-WAY 4-Pole Flat Connector, Trailer End, 18\" Wires","description":"Wesbar Wishbone Wiring Harness with 4-Pole Flat Trailer Connector - Trailer End - 18\" Long. \n \nFeatures: \n \n4-Pole flat trailer-end connector plugs into the 4-way flat on your tow vehicle \n2 Tail light wires of wishbone-style harness make wiring your trailer more efficient \nOne tail light wire (brown) is bundled with left turn and brake wire (yellow), and one is bundled with right turn and brake wire (green) \nColor-coded wires allow for simple hardwiring to existing trailer connections \n \n002402 Wesbar 4-Pole Flat Trailer End Connector - Wishbone Harness - Trailer End - 18\" Long","brand":"eTrailer","offers":[{"title":"Default Title","offer_id":53080820187500,"sku":"002402","price":6.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/1890-221.lg.jpg?v=1768584047"},{"product_id":"35-4-way-4-flat-trailer-electrical-harness-4-way-4-pin-wishbone-style-with-42-ground","title":"35' 4-WAY 4-FLAT TRAILER ELECTRICAL HARNESS, 4 WAY , 4 PIN - WISHBONE STYLE WITH 42\" GROUND","description":"35' 4-WAY 4 FLAT TRAILER ELECTRICAL HARNESS \n \nHighlights \n \nEasy Trailer Rewire: 35 ft harness gives enough length for even large or tandem trailers. \nSimpler Light Setup: Wishbone design splits running lights left and right-no jumper wire needed. \nStandard 4-Way Plug: Flat connector handles tail, turn, and brake lights for most trailers. \nReliable Ground: 42\" white ground wire ensures clean connection for consistent light function. \nSized for Trailer Duty: All copper wires are 20 AWG for dependable power and flexibility.","brand":"eTrailer","offers":[{"title":"Default Title","offer_id":53080911151468,"sku":"A35W42B , A-35W42B","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/2356-960.lg.jpg?v=1768584457"},{"product_id":"4-way-flat-4-trailer-wiring-harness-20-wesbar","title":"4-WAY FLAT 4 TRAILER WIRING HARNESS, 20' WESBAR","description":"4-WAY FLAT 4 TRAILER WIRING HARNESS, 20' WESBAR \n \nWishbone-style harness features a 4-pole flat trailer-end connector. Ground wire is 3' long. \n \nFeatures: \n \nProvides simple, efficient method for rewiring your trailer with a 4-way flat trailer-end connector \n2 Brown wires, one with the green wire and the other with the yellow, make up the wishbone design \nColor coded for simple installation \nWhite wire (ground): 16-gauge \nYellow wire (left turn and brake): 18-gauge \nGreen wire (right turn and brake): 18-gauge \nBrown wires (tail lights): 18-gauge \n \nSpecs: \n \nOverall length: 20' \nGround wire length: 3' \n \n002220 Wesbar 4-Wire Flat Harness","brand":"eTrailer","offers":[{"title":"Default Title","offer_id":53080916754796,"sku":"002220","price":19.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/2578-1445.lg.jpg?v=1768584656"},{"product_id":"4-way-flat-4-trailer-wiring-harness-20","title":"4-WAY FLAT 4 TRAILER WIRING HARNESS, 20'","description":"4-WAY FLAT 4 TRAILER WIRING HARNESS, 20'","brand":"Dexter Axle Company","offers":[{"title":"Default Title","offer_id":53080935301484,"sku":"420YH , B3420Y","price":19.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/2934-2076.lg.jpg?v=1768585023"},{"product_id":"4-way-flat-4-trailer-wiring-harness-15","title":"4-WAY FLAT 4 TRAILER WIRING HARNESS, 15'","description":"4-WAY FLAT 4 TRAILER WIRING HARNESS, 15'","brand":"Dexter Axle Company","offers":[{"title":"Default Title","offer_id":53080935334252,"sku":"415YH , B3415Y","price":16.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/2935-2077.lg.jpg?v=1768585025"},{"product_id":"25-4-way-4-flat-trailer-electrical-harness-4-way-4-pin-25-ground-cable","title":"25' 4-WAY 4-FLAT TRAILER ELECTRICAL HARNESS, 4 WAY , 4 PIN , 25' GROUND CABLE","description":"25' 4-WAY 4-FLAT TRAILER ELECTRICAL HARNESS, 4 WAY , 4 PIN , 25' GROUND CABLE \n \n4-Way trailer harness connects to your tow vehicle to control trailer light functions. Wishbone-style harness comes with 2 tail light wires split for simple wiring. \n \nFeatures: \n \n4-Way trailer harness connects to your tow vehicle to control trailer light functions \nWishbone-style harness comes with 2 tail light wires split for simple wiring \nAllows you to run wires separately down each side of the trailer to tail lights without needing a jumper wire \nColor coded wires help with installation \nWhite - ground \nBrown - tail lights \nYellow - driver side stop\/turn \nGreen - passenger side stop\/turn \n \nSpecs: \n \nWire harness length: 25' \nGround wire length: 25' \nWire gauge: 19 \n \nA25W2GWB Optronics 4-Way Wishbone Trailer Wiring Harness with (2) 25' Ground Wires - 25' Long","brand":"eTrailer","offers":[{"title":"Default Title","offer_id":53080940314988,"sku":"A25W2GWB","price":24.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/2997-2263.lg.jpg?v=1768585087"},{"product_id":"4-pole-extension-12-long-4-pole-extender-vehicle-and-trailer-ends-4-way","title":"4-POLE EXTENSION, 12\" LONG, 4 POLE EXTENDER, VEHICLE AND TRAILER ENDS, 4-WAY","description":"4-POLE EXTENSION, 12\" LONG, 4 POLE EXTENDER, VEHICLE AND TRAILER ENDS, 4-WAY \n \nExtend your current 4-way connector by 12\" with this 4-way flat wiring harness extension. \n \nFeatures: \n \nTrailer wiring extension loop extends your current 4-way connector \nExtends wiring system by 12\" for more flexibility \nIncludes car end and trailer end connections \nCorrosion-resistant terminals ensure durability \n \n48145 Hopkins 4-Way Flat Wiring Extension Loop - 12\" Long","brand":"eTrailer","offers":[{"title":"Default Title","offer_id":53080956830060,"sku":"HM48145 , 48145","price":7.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/3387-3241.lg.jpg?v=1768585530"},{"product_id":"4-pole-extension-4-long-4-pole-extender-vehicle-and-trailer-ends-4-way","title":"4-POLE EXTENSION, 4' LONG, 4 POLE EXTENDER, VEHICLE AND TRAILER ENDS, 4-WAY","description":"4-POLE EXTENSION, 4' LONG, 4 POLE EXTENDER, VEHICLE AND TRAILER ENDS, 4-WAY \n \n4-Way Flat Wiring Harness Extension \n \nExtends your current 4-way connector 48\" \nIncludes cover and grease \n \n47115 48\" Long 4-Pole Loop with Cover","brand":"eTrailer","offers":[{"title":"Default Title","offer_id":53080956862828,"sku":"HM47115 , 47115","price":10.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/3388-3243.lg.jpg?v=1768585532"},{"product_id":"curt-4-way-4-pin-flat-socket-circuit-tester-led-for-vehicle-end-retail-packaged","title":"CURT 4-WAY \/ 4-PIN FLAT SOCKET CIRCUIT TESTER, LED FOR VEHICLE END, RETAIL PACKAGED","description":"CURT 4-WAY \/ 4-PIN FLAT SOCKET CIRCUIT TESTER, LED FOR VEHICLE END, RETAIL PACKAGED \n \n- Confirms proper function of vehicle-side wiring connector \n- Tests 4-way flat connection for tail lights, brake lights and turn signals \n- Constructed with LED lights for long-lasting use \n \nProduct Details \nPart of towing responsibly is making sure your trailer lights are working properly. Whether you have just installed a new custom wiring harness or are trying to locate the cause of an electrical problem, CURT connector testers are great for testing tail lights, turn signals, brake lights, ground connections and other electrical components on your vehicle. \n \nA connector tester works by plugging into the connector socket on your vehicle and responding to the various electrical signals produced by pushing the brake pedal, signaling a turn, turning on the running lights and so on. When the socket is getting proper power, the tester's various LEDs will light up corresponding to each wire in the connector. Testing your vehicle-side socket is essential after installing a new custom vehicle-to-trailer wiring harness and is highly recommended every time you hitch up to tow.","brand":"Curt","offers":[{"title":"Default Title","offer_id":53081023447404,"sku":"58261 , C58261 , I26 , 58260 , 491830","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/files\/4350-5285.lg.jpg?v=1768586332"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/5155\/2876\/collections\/Screenshot_2026-03-19_122749.png?v=1773937709","url":"https:\/\/shop.fentontradingpost.com\/collections\/4-way-or-4-pin-flat-trailer-harnesses.oembed","provider":"Fenton Trading Post","version":"1.0","type":"link"}