Trailer Hitch Wiring & Electrical

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    • (63 reviews)
      # sp111100
      T-Connector by CURT®. This provides all you need to connect a trailer to the tow vehicle. Generous length allows plenty of wire. Female end is for tow vehicle, male end for trailer.
      Custom fitAmple length
      $9.80 - $82.81
    • (11 reviews)
      # sp24027
      T-One Connector by Tekonsha®. Wire up your tow vehicle and trailer with whatever it takes to get your trailer lights on, the electric brakes slowing down, and the trailer battery charging. From simple wiring connectors, to connectors...
      Plug and Play T-harnesses to connect to vehicle wiringTrailer wiring connectors, for both truck and trailer
      $11.89 - $183.21
    • (0 reviews)
      # mpn4553775748
      T-Connector 3-Wire System with Powered Converter by CURT®. For Models without Tow Plug, 3-wire System, Location: S4. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
      Plugs into existing OEM vehicle socket to provide a 4-way flat socketSimple plug-and-play design eliminates the need for cutting or splicing
      $34.15
    • (0 reviews)
      # sp123368
      Towed-Vehicle RV Harness by CURT®. Whether you are towing cross-country or hitting the family campground, 5th wheel trailers offer superior comfort, towing, and construction. Combine these amenities with a Curt Inc. 5th wheel hitch and...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $41.82 - $89.28
    • (5 reviews)
      # sp2847
      Multi-Tow™ Towing Wiring Kit by Hopkins®. Unplug your vehicle's factory wiring harness and plug in a Hopkins vehicle wiring harness. That's how easy trailer wiring is with a Plug-In-Simple! wiring kit, featuring Exact OEM Fit...
      Provides multiple towing options from one connectorPlug-In Simple®: No cutting, No splicing - Saves time
      $21.45 - $38.82
    • (0 reviews)
      # sp46949
      Wiring Components by Tekonsha®. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost care and attention to detail, this Tekonsha product ensures superior reliability....
      No Cutting Or Splicing Vehicle WiringIsolates Trailer Light Operation from Tow Vehicle's Electrical System
      $123.15
    • (2 reviews)
      # sp102784
      Towing Wiring Harness by Westin®. Connectors wire directly into your vehicle's factory tail light to allow you to connect a trailer lighting and wiring system directly into your vehicle. This product is made from high-grade materials to...
      2 Wire And 3 Wire Systems AvailableInstalls Cleanly Into The Vehicle's Taillights
      $13.38 - $84.72
    • (1 review)
      # sp123393
      Trailer T-Connector Harness by Westin®. T-Connectors wire directly into your vehicle's factory tail light to allow you to connect a trailer lighting and wiring system directly into your vehicle. CA Prop 65 WARNING - Some products may...
      2 Wire And 3 Wire Systems AvailableInstalls Cleanly Into The Vehicle's Taillights
      $44.81 - $59.80
    • (0 reviews)
      # mpn4475501580
      T-Connector by Crown®. 4-Flat. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck! CA Prop 65 WARNING...
      Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come
      $32.03
    • (0 reviews)
      # mpn4475501586
      Towing Wiring Harness by Outland Automotive®. 4-Flat. If you own a truck or SUV, you need Outland Accessories. Outland features a full line of Truck / SUV Tube Steps, Bull Bars, All Terrain Floor Liners, Consoles and other functional...
      Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come
      $33.25
    • (0 reviews)
      # mpn1298265
      Towing Wiring Harness by Rugged Ridge®. Personalize and customize your Jeep with attractive chrome, stainless steel or black trim parts from Rugged Ridge. Trim parts that shine or are in a contrasting color will make your Jeep stand out...
      Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come
      $34.99
    • (0 reviews)
      # mpn1692317
      Tow Wiring Harness by Smittybilt®. This wiring harness will make connecting the trailer wiring to your vehicle a plug n' play operation. It's specifically designed for the application and features OEM quality connectors and a rugged...
      Custom-engineered to fit your vehicleDesigned to OEM specifications
      $30.99
    • (0 reviews)
      # mpn4553773648
      Tail Light Converter 7.5 Amps Per Circuit for Turn and Brake Lights / 7.5 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $35.10
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (0 reviews)
      # mpn4553773648
      Tail Light Converter 7.5 Amps Per Circuit for Turn and Brake Lights / 7.5 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $35.10
    • (3 reviews)
      # mpn1097259
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 5.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $22.68
    • (0 reviews)
      # mpn4553773648
      Tail Light Converter 7.5 Amps Per Circuit for Turn and Brake Lights / 7.5 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $35.10
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (3 reviews)
      # mpn1097259
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 5.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $22.68
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (3 reviews)
      # mpn1097259
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 5.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $22.68
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (2 reviews)
      # mpn4553773502
      Tail Light Converter 3.0 Amps Per Circuit for Turn and Brake Lights / 6.0 Amps Per Circuit for Tail Lights by CURT®. 3-Wire to 2-Wire System, Circuit Protected. This product is made of high-quality materials to serve you for years to...
      Converts 3-wire vehicle electrical system to standard 2-wire trailer wiring4-way flat output connects tail lights, brake lights and turn signals
      $23.80
    • (1 review)
      # sp104893
      Adapters by CURT®. 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, this product by Curt will last a lifetime. It will meet your needs...
      Will perfectly meet your needsOutperforms competitors
      $11.40 - $22.87
    • (0 reviews)
      # sp123366
      Hitch Wiring by CURT®. 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, this product by Curt will last a lifetime. It will meet your...
      Will perfectly meet your needsOutperforms competitors
      $13.36
    • (0 reviews)
      # sp98383
      6-7 Way Connectors by Tow Ready®. Wire up your tow vehicle and trailer with whatever it takes to get your trailer lights on, the electric brakes slowing down, and the trailer battery charging. From simple wiring connectors, to...
      Plug and Play T-harnesses to connect to vehicle wiringTrailer wiring connectors, for both truck and trailer
      $34.78 - $68.65
    • (1 review)
      # mpn3526390337
      Universal OE Multi-Tow® 7 Blade and 4 Flat Replacement Connector by Hopkins®. Quantity per Package: 1. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
      Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come
      $47.13




    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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    Towing Electrical & Wiring Reviews

    Average rating:    4.5 - 245 reviews
    4.5 of 5
    Not Good for 2018 VW Tiguan!
    I do not recommend this product for the 2018 VW Tiguan. The status testing lights cause problems with the back up viewing camera when the trailer is not attached. My advise is to go with the standard 4 way flat dual output adapter without tester. When you use the one without the tester and you have no trailer hooked up, the backup camera works normal. Just be aware that when you do hook up a trailer to your Tiguan your rear view camera will go into trailer viewing mode when in reverse. Hope this helps VW Tiguan owners.
    Posted by Mark A Solano (Gilbertsville, PA) / September 14, 2018
    Was this review helpful for you? Yes
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