Trailer Hitch Wiring & Electrical
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- CURT®7-Way Round Connector Plug with Spring (58180)Universal 7-Way Round Connector Plug with Spring (58180) by CURT®. Bulk. Includes trailer-end plug with wire protector spring. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.76
- CURT®7-Way to 4-Way Coiled RV Blade Electrical Adapter Harness (57271)Universal 7-Way to 4-Way Coiled RV Blade Electrical Adapter Harness by CURT®. A CURT connector provides a reliable connection for your trailer wiring, using an industry-standard format, such as a 4-way flat, 6-way round or 7-way RV...Proudly made in Wisconsin, from start to finishBacked by a one-year parts warranty$27.87
- CURT®72" 5-Way Flat Vehicle End and Trailer End Connector Plug and Socket (58550)Universal 72" 5-Way Flat Vehicle End and Trailer End Connector Plug and Socket (58550) by CURT®. Bulk. Includes trailer-end plug and vehicle-end socket on 72" bonded wire loop. Like trailer hitches and ball mounts, electrical connectors...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$12.60
- CURT®8' 7-Way RV Blade Replacement Harness (56602)Universal 8' 7-Way RV Blade Replacement Harness (56602) by CURT®. Bulk. Replaces a trailer-end 7-way RV blade plug. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but...Precisely welded for a perfect fit and functionProtected by an industry-leading, dual-coat finish - inside and out$43.61
- CURT®8' Dinghy Towing Adapter & Socket (7-Way RV Blade to 4-Way Round Vehicle) (57285)Universal 8' Dinghy Towing Adapter & Socket (7-Way RV Blade to 4-Way Round Vehicle) by CURT®. There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$65.73
- CURT®8' Dinghy Towing Adapter & Socket (7-Way RV Blade to 6-Way Round Vehicle) (57283)Universal 8' Dinghy Towing Adapter & Socket (7-Way RV Blade to 6-Way Round Vehicle) by CURT®. There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$67.40
- CURT®8' Dinghy Towing Electrical Adapter & Socket (7-Way RV Blade, Fits USCAR) (57284)Universal 8' Dinghy Towing Electrical Adapter & Socket (7-Way RV Blade, Fits USCAR) by CURT®. There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$67.40
- CURT®8' Dinghy Towing Electrical Extension & Sockets (6-Way Round) (57286)Universal 8' Dinghy Towing Electrical Extension & Sockets (6-Way Round) by CURT®. There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some trailers...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$67.76
- CURT®8' Electrical Adapter Harness (7-Way RV Blade Vehicle to 4-Way Flat Trailer) (57280)Universal 8' Electrical Adapter Harness (7-Way RV Blade Vehicle to 4-Way Flat Trailer) by CURT®. There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system....Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$36.13
- CURT®8' Electrical Adapter Harness (7-Way RV Blade Vehicle to 5-Way Flat Trailer) (57282)Universal 8' Electrical Adapter Harness (7-Way RV Blade Vehicle to 5-Way Flat Trailer) by CURT®. There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system....Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$43.59
- CURT®Connector Dust Cover (58202)Universal Connector Dust Cover by CURT®. Fits vehicle-end 5-way flat connector socket. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$0.50
- CURT®Die-Cast 7-Way Round Car End Connector Socket (58170)Universal Die-Cast 7-Way Round Car End Connector Socket (58170) by CURT®. Includes vehicle-end socket only. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$16.46
- CURT®Die-Cast 7-Way Round Trailer End Connector Plug (58160)Universal Die-Cast 7-Way Round Trailer End Connector Plug (58160) by CURT®. Bulk. Includes trailer-end plug only. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$15.15
- CURT®Electrical Adapter (4-Way Flat Vehicle to USCAR) (56476)Universal Electrical Adapter (4-Way Flat Vehicle to USCAR) by CURT®. There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some trailers only need the...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$33.68
- CURT®Female Quick Connector (59593)Universal Female Quick Connector (59593) by CURT®. Fit 12-10 Gauge Wires. Color: Yellow. Pack of 100. Provides a female connection with the ability to easily disconnect later. Like trailer hitches and ball mounts, electrical connectors...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$16.07
- CURT®Female Quick Connector (59592)Universal Female Quick Connector (59592) by CURT®. Fit 16-14 Gauge Wires. Color: Blue. Pack of 100. Provides a female connection with the ability to easily disconnect later. Like trailer hitches and ball mounts, electrical connectors...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$14.34
- CURT®Heave Duty 7-Way Round Trailer Side Connector (58145)Universal Heave Duty 7-Way Round Trailer Side Connector (58145) by CURT®. A CURT connector provides a reliable connection for your trailer wiring, using an industry-standard format, such as a 4-way flat, 6-way round or 7-way RV blade....Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$9.71
- CURT®Heavy Duty 7-Way RV-Style Car-Side Connector (58155)Universal Heavy Duty 7-Way RV-Style Car-Side Connector (58155) by CURT®. A CURT connector provides a reliable connection for your trailer wiring, using an industry-standard format, such as a 4-way flat, 6-way round or 7-way RV blade....Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$14.62
- CURT®Insulated Ring Terminal (59556)Universal Insulated Ring Terminal (59556) by CURT®. 5/16" Stud Size. Color: Yellow. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.46
- CURT®Insulated Ring Terminal (59523)Universal Insulated Ring Terminal (59523) by CURT®. 3/8" Stud Size. Color: Blue. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$18.18
- CURT®Insulated Ring Terminal (59522)Universal Insulated Ring Terminal (59522) by CURT®. 1/4" Stud Size. Color: Blue. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$16.30
- CURT®Insulated Ring Terminal (59538)Universal Insulated Ring Terminal (59538) by CURT®. 3/8" Stud Size. Color: Yellow. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$18.59
- CURT®Insulated Ring Terminal (59521)Universal Insulated Ring Terminal (59521) by CURT®. 1/10" Stud Size. Color: Blue. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$12.60
- CURT®Insulated Ring Terminal (59534)Universal Insulated Ring Terminal (59534) by CURT®. 1/4" Stud Size. Color: Yellow. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.46
- CURT®Insulated Ring Terminal (59531)Universal Insulated Ring Terminal (59531) by CURT®. 1/10" Stud Size. Color: Yellow. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$16.76
- CURT®Insulated Ring Terminal (59525)Universal Insulated Ring Terminal (59525) by CURT®. 5/16" Stud Size. Color: Blue. Quantity 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$16.30
- CURT®Male Quick Connector (59432)Universal Male Quick Connector (59432) by CURT®. Fit 16-14 Gauge Wires. Color: Blue. Pack of 100. Provides a male connection with the ability to easily disconnect later. Like trailer hitches and ball mounts, electrical connectors range...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$14.34
- CURT®Male Quick Connector (59433)Universal Male Quick Connector (59433) by CURT®. Fit 12-10 Gauge Wires. Color: Yellow. Pack of 100. Provides a male connection with the ability to easily disconnect later. Like trailer hitches and ball mounts, electrical connectors...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$16.07
- CURT®Towed-Vehicle RV Harness Add-On (58920)Universal Towed-Vehicle RV Harness Add-On (58920) by CURT®. For use with 3-wire system with battery connection RV harnesses. One Year Limited. If you're towing your vehicle along for your next RV adventure, Bring It® with CURT! CURT...Creates a safe, reliable connection between your tow vehicle and your trailerTested in-house for safety$40.16
- CURT®Towed-Vehicle RV Harness Add-On (58919)Universal Towed-Vehicle RV Harness Add-On (58919) by CURT®. For use with 3-wire system RV harnesses. One Year Limited. If you're towing your vehicle along for your next RV adventure, Bring It® with CURT! CURT towed-vehicle RV harnesses...Creates a safe, reliable connection between your tow vehicle and your trailerTested in-house for safety$30.76
So, you’ve got your trailer connected to your truck with the right hitch, ball mount and trailer ball. You’re ready to go, but what about your trailer lights? If the trailer connector doesn’t match the one on your tow vehicle, or if the vehicle doesn’t even have a plug, stick around. From basic exterior lights to 12-volt powered accessories, all trailers need electric power supplied by your vehicle, and we have everything needed to make a hassle-free connection including extensions, connectors, harnesses and adapters.
There are a number of standardized trailer connectors, such as 4-pin flat/round, 5-pin flat, 6-pin square/round, and 7-pin round. The simplest 4-pin system is used for small trailers, and has one ground pin, one pin each for left and right turn signals and brake lights, and one for the running lights. 5-pin flat connectors add a wire for the back-up lights. If the trailer is equipped with surge brakes, this circuit also disengages the brakes when the vehicle is backing up.
In addition to connections for turn signals, brake lights, tail lights and ground, 6-pin connectors have one terminal each for electric brakes and 12-volt accessories. 6-pin connectors come in square and round styles and are common to gooseneck and 5th wheel trailers, boat trailers and campers. 7-pin connectors are most commonly found on new vehicles that are prewired for towing. Along with the same functions as a 6-pin connector, this connector has a 7th circuit that is for the back-up lights. 7-pin connectors come with round or RV blade-style pins. Fortunately, no matter what connector you have on your trailer, we have the wiring harnesses that will let you plug into your vehicle’s electrical system.
The first thing you have to determine is whether your vehicle has a factory installed trailer towing package. If it does, you’ll find an electrical connector at the rear of the vehicle, usually on or near the bumper. If the shape and number of pins (wires) on the vehicle connector matches the one on your trailer, then all you’ll need is a wiring harness of sufficient length with the same connector at each end. If not, we can supply you with a plug-and-play adapter harness that will make all your trailer electrical functions work, without any cutting and splicing. For example, if your truck has a 7-pin round connector but your trailer has a 4-pin flat connector, one of our adapter harnesses will have you connected in minutes.
But don’t worry if your vehicle isn’t already set up for towing, we can still get you connected without much hassle. For most vehicles we offer a plug-and-play T-shaped harness (so called because it connects to both of your tail lights) that connects your vehicle lights to the trailer lights. If you have an obscure vehicle for which no T-shaped harness is available, we can still help, but some splicing will be necessary. And if your vehicle uses separate bulbs for the brake lights and turn signals but your trailer uses one bulb for both, we can supply you with a converter harness that will make the connection simple. We also have a large assortment of brackets, connectors, sockets, and anything else you need to get connected.
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Weight Distribution
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