Trailer Hitch Wiring & Electrical
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- Hopkins Towing®Trailer Side Test Unit (50928)Universal Trailer Side Test Unit (50928) by Hopkins Towing®. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer must have a reliable connection with the...Designed so that one person can make sure a trailer has been wired properly and all functions are workingTests all trailer functions: left turn, brake, tail, backup lights; electric brakes and auxiliary power$493.45
- Roadmaster®Economy Wiring Kit for Towed Vehicle (152)Economy Wiring Kit for Towed Vehicle by Roadmaster®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...High quality at an affordable priceExpertly made from premium materials$88.29
- Roadmaster®Hy-Power™ Diode (794)Hy-Power™ Diode (794) by Roadmaster®. 3 per Pack. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...High quality at an affordable priceExpertly made from premium materials$59.40
- AP Products®4-Way Plug-Guard™ Total Plug Protection (008-324)4-Way Plug-Guard™ Total Plug Protection (008-324) by AP Products®. Clean, efficient and secure protection from the elements for the male plug of your trailer's wiring harness, while the trailer is not in use. Plug Guards attach to the...Made from rock-solid strong materials to withstand the rigors of the roadBacked by solid design, exceptional reliability, and maximum safety$16.97
- AP Products®7-Way Plug-Guard™ Total Plug Protection (008-320)7-Way Plug-Guard™ Total Plug Protection (008-320) by AP Products®. Clean, efficient and secure protection from the elements for the male plug of your trailer's wiring harness, while the trailer is not in use. Plug Guards attach to the...Made from rock-solid strong materials to withstand the rigors of the roadBacked by solid design, exceptional reliability, and maximum safety$16.74
- Pollak®7-Way Connector Mounting Bracket (11771)Universal 7-Way Connector Mounting Bracket by Pollak®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Expertly crafted from premium materialsDesigned to match rigorous quality standards$2.88
- Pollak®Heavy Duty 7-Way Plug (11700)Universal Heavy Duty 7-Way Plug (11700) by Pollak®. Without Cable Guard. Material: Zinc Die-Cast. 7-way die cast plug with cable guard. Will accept a large range of wire gauges. Interchangeable. This top-grade product is expertly made...Expertly crafted from premium materialsDesigned to match rigorous quality standards$14.19
- Pollak®Heavy Duty 7-Way Plug with Cable Guard (11-702P)Universal Heavy Duty 7-Way Plug with Cable Guard (11-702P) by Pollak®. With Cable Guard. Material: Zinc Die-Cast. 7-way die cast plug with cable guard. Will accept a large range of wire gauges. Interchangeable. This top-grade product is...Expertly crafted from premium materialsDesigned to match rigorous quality standards$23.65
- Pollak®Zinc Connector Mounting Bracket (11617)Universal Zinc Connector Mounting Bracket by Pollak®. Finish: Zinc. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....Three socket versions to choose from: Exposed, Rubber boot coverage, or Die-cast shell coverageHigh impact interiors of super strength keyed for proper assembly$2.71
- CURT®10' 7-Way RV Blade Replacement Harness (56603)Universal 10' 7-Way RV Blade Replacement Harness (56603) 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$52.14
- CURT®12" 2-Way Flat Connector Plug and Socket (58020)Universal 12" 2-Way Flat Connector Plug and Socket (58020) by CURT®. Bulk. Includes trailer-end plug and vehicle-end socket on 12" bonded wire loop. Like trailer hitches and ball mounts, electrical connectors range all over the board in...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$2.92
- CURT®12" 4-Way Flat Connector Plug (58030)Universal 12" 4-Way Flat Connector Plug (58030) by CURT®. Bulk. Without Hardware. Includes trailer-end plug with 12" bonded wire. 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$2.90
- CURT®12" 4-Way Flat Connector Plug Kit (58033)Universal 12" 4-Way Flat Connector Plug Kit (58033) by CURT®. With Hardware. Includes trailer-end plug with bonded wire and hardware. Packaged. Like trailer hitches and ball mounts, electrical connectors range all over the board in...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$5.62
- CURT®12" 4-Way Flat Connector Plug and Socket (58304)Universal 12" 4-Way Flat Connector Plug and Socket (58304) by CURT®. Packaged. Includes trailer-end plug and vehicle-end socket, each with 12" bonded wire. Like trailer hitches and ball mounts, electrical connectors range all over the...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$7.51
- CURT®12" 4-Way Flat Connector Plug and Socket Bonded (58380)Universal 12" 4-Way Flat Connector Plug and Socket Bonded (58380) by CURT®. Bulk. Includes trailer-end plug and vehicle-end socket on 12" bonded wire loop. Like trailer hitches and ball mounts, electrical connectors range all over the...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$4.64
- CURT®12" 4-Way Flat Connector Plug and Socket Kit (58344)Universal 12" 4-Way Flat Connector Plug and Socket Kit (58344) by CURT®. Packaged. With Hardware. Includes trailer-end plug and vehicle-end socket, each with 12" bonded wire and hardware. Like trailer hitches and ball mounts, electrical...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$9.91
- CURT®12-10 Gauge Wires Spade Terminals (59631)Universal 12-10 Gauge Wires Spade Terminals (59631) by CURT®. Fit 12-10 Gauge Wires. Color: Yellow. Quantity 100. 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$16.76
- CURT®12-10 Gauge Yellow Butt Connector (59423)Universal 12-10 Gauge Yellow Butt Connector (59423) by CURT®. Securely connects wires without the need for tape. Color: Yellow. Quantity Per Package: 100. Like trailer hitches and ball mounts, electrical connectors range all over the...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.49
- CURT®16-14 Gauge Blue Butt Connector (59422)Universal 16-14 Gauge Blue Butt Connector (59422) by CURT®. Securely connects wires without the need for tape. Color: Blue. Quantity Per Package: 100. Like trailer hitches and ball mounts, electrical connectors range all over the board...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$12.01
- CURT®16-14 Gauge Wires Spade Terminals (59621)Universal 16-14 Gauge Wires Spade Terminals (59621) by CURT®. Fit 16-14 Gauge Wires. Color: Blue. Quantity 100. 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$12.60
- CURT®18-10 Gauge Twist on Wire Connectors (59901)Universal 18-10 Gauge Twist on Wire Connectors by CURT®. Pack of 100. 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 electrical...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.88
- CURT®18-14 Gauge Wire Snap Locks (59956)Universal 18-14 Gauge Wire Snap Locks (59956) by CURT®. With Gel Sealant. Pack of 100. Splices wires together without stripping or soldering. Features gel sealant. Like trailer hitches and ball mounts, electrical connectors range all...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$66.25
- CURT®18-14 Gauge Wire Snap Locks (58280)Universal 18-14 Gauge Wire Snap Locks (58280) by CURT®. Without Gel Sealant. Color: Blue. Pack of 100. Splices wires together without stripping or soldering. Like trailer hitches and ball mounts, electrical connectors range all over the...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$18.59
- CURT®22-18 Gauge Red Butt Connector (59421)Universal 22-18 Gauge Red Butt Connector (59421) by CURT®. Securely connects wires without the need for tape. Color: Red. Quantity Per Package: 100. Like trailer hitches and ball mounts, electrical connectors range all over the board in...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$12.01
- CURT®22-18 Gauge Wires Spade Terminals (59611)Universal 22-18 Gauge Wires Spade Terminals (59611) by CURT®. Fit 22-18 Gauge Wires. Color: Red. Quantity 100. 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$12.60
- CURT®36" 4-Way Flat License Plate Light Plug Connector Socket (58405)Universal 36" 4-Way Flat License Plate Light Plug Connector Socket (58405) by CURT®. Bulk. Fits a typical license plate light hole. Includes a 36" bonded lead. Like trailer hitches and ball mounts, electrical connectors range all over...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.26
- CURT®4-Way Flat Connector Socket Kit (58345)Universal 4-Way Flat Connector Socket Kit by CURT®. 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 electrical functions are, you need...Adapts a 4-way flat socket to fit multiple trailer plugsDesigned for certain years of the your vehicle without factory tow wiring$12.28
- CURT®4-Way Round Connector Plug and Socket Kit (58677)Universal 4-Way Round Connector Plug and Socket Kit (58677) by CURT®. Includes trailer-end plug, vehicle-end socket, wiring, mounting bracket and hardware. Packaged. Like trailer hitches and ball mounts, electrical connectors range all...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.78
- CURT®4-Way Round Trailer End Connector Plug (58061)Universal 4-Way Round Trailer End Connector Plug (58061) by CURT®. Packaged. 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$9.14
- CURT®4-Way Round Trailer End Connector Plug (58060)Universal 4-Way Round Trailer End Connector Plug (58060) 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 matter...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.26
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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