Trailer Hitch Wiring & Electrical
- Hopkins Towing®4-Wire Flat to 6-Pole Round AdapterUniversal 4-Wire Flat to 6-Pole Round Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn, tail light,...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$28.29 - $30.63
- Hopkins Towing®6-Pole Round Adapter with Flexible WiresUniversal 6-Pole Round Adapter with Flexible Wires by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn, tail...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$11.94 - $15.17
- Hopkins Towing®6-Pole Round to 4-Wire Flat AdapterUniversal 6-Pole Round to 4-Wire Flat Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn, tail light,...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$5.41 - $10.98
- Hopkins Towing®7 Blade Connector with Jacketed CableUniversal 7 Blade Connector with Jacketed Cable by Hopkins Towing®. With Cardboard Wrap Package. To ensure a secure and reliable connection and consolidate all of the electrical towing functions of your trailer into a single plug, go...Heavy duty constructionWire is heavily insulated with jacketed wire sleeving$38.92 - $46.37
- Hopkins Towing®7 RV Molded ConnectorUniversal 7 RV Molded Connector by Hopkins Towing®. To ensure a secure and reliable connection and consolidate all of the electrical towing functions of your trailer into a single plug, go with this great add-on by Hopkins. Typically...Heavy duty constructionWire is heavily insulated with jacketed wire sleeving$26.16 - $54.73
- Hopkins Towing®7-Way RV Blade To 4-Wire Flat AdapterUniversal 7-Way RV Blade To 4-Wire Flat Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn, tail light,...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$10.00 - $11.94
- Hopkins Towing®7-Way RV Blade To 6-Wire Round AdapterUniversal 7-Way RV Blade To 6-Wire Round Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn, tail light,...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$14.35 - $18.26
- Hopkins Towing®Endurance Flex-Coil Nite-Glow™ AdapterUniversal Endurance Flex-Coil Nite-Glow™ Adapter 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...Nite-Glow™ illuminates on taillight function verifying continuityStretches to 8 feet$52.82 - $65.70
- Hopkins Towing®Endurance Flex-Coil™ 7 RV Blade AdapterUniversal Endurance Flex-Coil™ 7 RV Blade Adapter 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...Splice onto tow vehicle's wiring systemCorrosion resistant terminals$38.92 - $84.95
- Hopkins Towing®Endurance Quick-Fix™ 4-Wire Flat ConnectorUniversal Endurance Quick-Fix™ 4-Wire Flat Connector by Hopkins Towing®. To have a greater peace of mind when driving with a trailer, go with this perfect accessory that is sure to provide you with a safe, secure connection. Made of...LED test lights confirm electrical continuityErgonomic grip for easier handling$8.20 - $11.51
- Hopkins Towing®Endurance™ 4-Wire Flat ConnectorUniversal Endurance™ 4-Wire Flat Connector by Hopkins Towing®. To have a greater peace of mind when driving with a trailer, go with this perfect accessory that is sure to provide you with a safe, secure connection. Made of sturdy,...Ensure a perfect, weather-tight fitBuilt of durable materials to last$5.81 - $8.08
- Hopkins Towing®Endurance™ 5-Wire Flat ConnectorUniversal Endurance™ 5-Wire Flat Connector by Hopkins Towing®. To have a greater peace of mind when driving with a trailer, go with this perfect accessory that is sure to provide you with a safe, secure connection. Made of sturdy,...Ensure a perfect, weather-tight fitBuilt of durable materials to last$12.20 - $19.44
- Hopkins Towing®Endurance™ 6-Pole Round ConnectorUniversal Endurance™ 6-Pole Round Connector by Hopkins Towing®. To have a greater peace of mind when driving with a trailer, go with this perfect accessory that is sure to provide you with a safe, secure connection. Made of sturdy,...Ensure a perfect, weather-tight fitBuilt of durable materials to last$12.65 - $17.57
- Hopkins Towing®Endurance™ 7 RV Blade ConnectorUniversal Endurance™ 7 RV Blade Connector by Hopkins Towing®. To have a greater peace of mind when driving with a trailer, go with this perfect accessory that is sure to provide you with a safe, secure connection. Made of sturdy,...Ensure a perfect, weather-tight fitBuilt of durable materials to last$13.79 - $19.53
- Hopkins Towing®Endurance™ Easy-Pull™ 4 Flat ExtensionUniversal Endurance™ Easy-Pull™ 4 Flat Extension by Hopkins Towing®. Without LED Tester. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer must have a...Endurance™ Professional GradeEasy-pull grips ease in connecting, disconnecting$12.25 - $16.38
- Hopkins Towing®Endurance™ Flex AdapterUniversal Endurance™ Flex Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn, tail light, auxiliary,...Provides for flexible reach3-Year Warranty$17.48 - $24.99
- Hopkins Towing®LED Test 7 Blade to 6 Round Adapter with LED'sUniversal LED Test 7 Blade to 6 Round Adapter with LED's by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn,...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$14.12 - $14.86
- Hopkins Towing®Multi-Tow™ 4-Wire Flat AdapterUniversal Multi-Tow™ 4-Wire Flat Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right turn, tail light,...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$24.61 - $37.55
- Hopkins Towing®Multi-Tow™ 7 RV Blade to 5-Wire and 4-Wire Flat AdapterUniversal Multi-Tow™ 7 RV Blade to 5-Wire and 4-Wire Flat Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$19.99 - $22.79
- Hopkins Towing®Multi-Tow™ 7 RV Blade to 6 Round and 4 Flat AdapterUniversal Multi-Tow™ 7 RV Blade to 6 Round and 4 Flat Adapter by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right...Durable construction to last a long timeHeavily insulated wires with jacketed sleeving$16.00 - $24.49
- Hopkins Towing®Trailer Wiring Installation KitUniversal Trailer Wiring Installation Kit by Hopkins Towing®. Everything needed to rewire a trailer. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and...Ideal for Y-Harness and 4 conductor wire installationResealable storage case keeps items secure and organized$14.30 - $21.55
- Husky Towing®Custom Trailer Wiring ConnectorUniversal Custom Trailer Wiring Connector by Husky Towing®. 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....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$4.46 - $56.17
- Husky Towing®Tail Light ConverterUniversal Tail Light Converter by Husky Towing®. 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 from...Limited 1 Year WarrantyPerfect blend of leading innovations and superior workmanship$20.35 - $112.47
- Husky Towing®Towed Vehicle Wiring KitUniversal Towed Vehicle Wiring Kit by Husky Towing®. 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 from...Limited 1 Year WarrantyPerfect blend of leading innovations and superior workmanship$38.00 - $45.60
- Husky Towing®Trailer Wiring Connector AdapterUniversal Trailer Wiring Connector Adapter by Husky Towing®. 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....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$9.04 - $77.71
- Husky Towing®Trailer Wiring Connector ExtensionUniversal Trailer Wiring Connector Extension by Husky Towing®. 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....Perfect blend of leading innovations and superior workmanshipManufactured to offer high value and everlasting reliability$2.34 - $16.12
- Husky Towing®Trailer Wiring Connector Mounting BracketUniversal Trailer Wiring Connector Mounting Bracket by Husky Towing®. 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....Limited 1 Year WarrantyPerfect blend of leading innovations and superior workmanship$4.54 - $10.52
- Blue Ox®Coiled Electrical CableUniversal Coiled Electrical Cable by Blue Ox®. Transform your vehicle into a reliable load-hauling machine by installing this superior trailer hitch. With this product that is made utilizing only the highest quality materials and the...Designed to safely and efficiently haul your loadsMade from the highest quality materials$76.29 - $77.50
- Blue Ox®LED Tail Light Wiring KitUniversal LED Tail Light Wiring Kit by Blue Ox®. Transform your vehicle into a reliable load-hauling machine by installing this superior trailer hitch. With this product that is made utilizing only the highest quality materials and the...Designed to safely and efficiently haul your loadsMade from the highest quality materials$112.14 - $118.58
- Blue Ox®LED Wiring KitUniversal LED Wiring Kit by Blue Ox®. Includes Bulb and Socket Assembly. 10-pack. Transform your vehicle into a reliable load-hauling machine by installing this superior trailer hitch. With this product that is made utilizing only the...Designed to safely and efficiently haul your loadsMade from the highest quality materials$222.36 - $246.16
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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Related Categories
- Trailer Hitches
- Hitch Balls & Mounts
- Brake Controllers
- Pintle Hitches
- Hitch Accessories
- 5th Wheel Hitches
- Gooseneck Hitches
- Weight Distribution
- Sway Control
- Front Hitches
- Tow Bars
- Trailer Couplers
- Trailer Brakes
- Trailer Breakaway Kit
- Hitch Cargo Carriers
- Hitch Covers
- Hitch Steps
- Straps & Tie Downs
- Trailers
- Trailer Jacks
- Trailer Winches
- Trailer Tool Boxes
- Trailer Accessories
- Tow Lights