Trailer Hitch Wiring & Electrical
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- CURT®Powered 3-to-2-Wire Tail Light Converter (59190)Universal Powered 3-to-2-Wire Tail Light Converter (59190) by CURT®. 7.5 Amp Turn/Brake, 7.5 Amp Tail Light. Quantity per Package: 1. Adapts 3-wire vehicle system to 2-wire trailer light wiring. Provides a 4-way flat connector. When...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$59.56
- CURT®Powered 3-to-2-Wire Tail Light Converter (56187)Universal Powered 3-to-2-Wire Tail Light Converter (56187) by CURT®. 3 Amp Turn/Brake, 5 Amp Tail Light. Without Wiring Kit. Quantity per Package: 1. Converts 3-wire vehicle system to 2-wire trailer light wiring. Provides a 4-way flat...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$30.76
- CURT®Powered 3-to-2-Wire Tail Light Converter (59187)Universal Powered 3-to-2-Wire Tail Light Converter (59187) by CURT®. 3 Amp Turn/Brake, 5 Amp Tail Light. With Wiring Kit. Quantity per Package: 1. Adapts 3-wire vehicle system to 2-wire trailer light wiring. Provides a 4-way flat...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$43.35
- CURT®Powered 3-to-2-Wire Tail Light Converter (56496)Universal Powered 3-to-2-Wire Tail Light Converter (56496) by CURT®. 3 Amp Turn/Brake, 6 Amp Tail Light. Without Wiring Kit and with Potted Enclosure. Quantity per Package: 1. One Year Limited. When your vehicle does not readily provide...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$36.13
- CURT®Powered Converter Wiring Kit (55152)Universal Powered Converter Wiring Kit (55152) by CURT®. Color: Yellow. 20' of 12-gauge cross-linked wire with installation hardware. When your vehicle does not readily provide an electrical connection for hooking up your trailer, CURT...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$17.61
- CURT®Powered Converter Wiring Kit (55151)Universal Powered Converter Wiring Kit (55151) by CURT®. Color: Red. 20' of 12-gauge cross-linked wire with installation hardware. When your vehicle does not readily provide an electrical connection for hooking up your trailer, CURT...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$17.61
- Hopkins Towing®100' 12 Gauge 2-Wire Bonded Wire Spool (49975)Universal 100' 12 Gauge 2-Wire Bonded Wire Spool (49975) 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...Most commonly used to wire auxiliary and electric brakes100% copper 2 wire bonded$88.90
- Hopkins Towing®100' 16 / 18 Gauge 4-Wire Bonded Wire Spool (49955)Universal 100' 16 / 18 Gauge 4-Wire Bonded Wire Spool (49955) 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...100 feet100% copper 4 wire bonded$61.23
- Hopkins Towing®12" 2 Pole Flat Extension (47965)Universal 12" 2 Pole Flat Extension 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 signaling...For use with 12-volt accessoriesWhite and red wire color$2.01
- Hopkins Towing®12" 4-Wire Flat Extension Adapter (48145)Universal 12" 4-Wire Flat Extension Adapter (48145) by Hopkins Towing®. Without LED Test. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as...Most Commonly Used Trailer ConnectorExtends wiring system for more flexibility$9.68
- Hopkins Towing®12-Volt Power Socket (55110)Universal 12-Volt Power Socket (55110) by Hopkins Towing®. Without 17' Power Wire and Fuse Assembly. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer must have...Flush-mount design, no drilling requiredMounts Anywhere Power is Needed$15.06
- Hopkins Towing®120" 4-Wire Flat Extension Adapter (48235)Universal 120" 4-Wire Flat Extension Adapter (48235) 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...Extends wiring system for more flexibilityMost Commonly Used Trailer Connector$13.42
- Hopkins Towing®25' 14 Gauge 4-Wire Bonded Wire Spool (49905)Universal 25' 14 Gauge 4-Wire Bonded Wire Spool (49905) 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...100 feet100% copper 4 wire bonded$26.35
- Hopkins Towing®32" 4-Wire Flat Extension with Ground (47105)Universal 32" 4-Wire Flat Extension with Ground 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,...Plug-In Simple!® AdapterExtends wiring system for more flexibility$7.93
- Hopkins Towing®4-Flat Connector Trailer End LED Tester (48133)Universal 4-Flat Connector Trailer End LED Tester 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...LED test lights verify wiring continuityCorrosion Resistant Terminals$6.56
- Hopkins Towing®4-Pole Round to 4-Wire Flat Adapter with Flexible Wires (47465)Universal 4-Pole Round to 4-Wire Flat 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...Plug-In Simple!® AdapterFlexible Wire Provides Larger Turning Radius$12.29
- Hopkins Towing®4-Way Flat Mounting Bracket (48595)Universal 4-Way Flat Mounting Bracket (48595) 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...Bracket Folds Over FlatKeeps connector out of harm's way$7.18
- Hopkins Towing®4-Wire Flat Knockout Adapter (47605)Universal 4-Wire Flat Knockout 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,...Can be mounted in place of vehicle's license plate lightPlug-In Simple!® Adapter$12.08
- Hopkins Towing®4-Wire Flat Tester with LED lights (48655)Universal 4-Wire Flat Tester with LED lights (48655) by Hopkins Towing®. With LED lights. 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...LED indicator lights test left/right turn, brake and taillight functionsRed LED lights will glow if connection is correct and function is activated$8.06
- Hopkins Towing®4-Wire Flat Weatherproof Dust Covers (48735)Universal 4-Wire Flat Weatherproof Dust Covers by Hopkins Towing®. Includes 2 dust covers and terminal grease packet for protecting 4 wire flats from corrosion. When attaching a trailer to your vehicle, a premium quality wiring kit or...Vehicle and trailer side dust coverRidges on body give an extra grip$3.56
- Hopkins Towing®4-Wire Flat to 5-Wire Flat Adapter (47515)Universal 4-Wire Flat to 5-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,...Retrofits existing 4 Wire Flat to a 5 Wire FlatFor use with marine trailers equipped with surge brakes$8.85
- Hopkins Towing®4-Wire Flat to 6-Pole Round Adapter (47165)Universal 4-Wire Flat to 6-Pole Round Adapter (47165) by Hopkins Towing®. Material: Metal. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as...Prewired for easier installationFlexible wire increases installation options$28.29
- Hopkins Towing®4-Wire Flat to 6-Pole Round Adapter (47155)Universal 4-Wire Flat to 6-Pole Round Adapter (47155) by Hopkins Towing®. Material: Plastic. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as...Prewired for easier installationFlexible wire increases installation options$30.63
- Hopkins Towing®48" 4-Wire Flat Extension Adapter (47115)Universal 48" 4-Wire Flat Extension Adapter (47115) 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...Plug-In Simple!® AdapterExtends wiring system for more flexibility$14.68
- Hopkins Towing®48" Tail Light Converter with Wire-In / Wire-Out (48845)Universal 48" Tail Light Converter with Wire-In / Wire-Out (48845) by Hopkins Towing®. Package. Wire-In / Wire-Out. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive...Recommended for repairing damaged taillight convertersPowers up to 2.1 amps per output$17.13
- Hopkins Towing®6-Pole Round to 4-Wire Flat Adapter (47325)Universal 6-Pole Round to 4-Wire Flat Adapter (47325) by Hopkins Towing®. With Built-In LED Tester. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions...Plug-In Simple!® AdapterVerifies Electrical Continuity$10.98
- Hopkins Towing®6-Pole Round to 4-Wire Flat Adapter (47305)Universal 6-Pole Round to 4-Wire Flat Adapter (47305) by Hopkins Towing®. Standard. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as left/right...Plug-In Simple!® AdapterIncludes Dust Cover$5.41
- Hopkins Towing®6-Pole Round to 4-Wire Flat Adapter with Flexible Wires (47315)Universal 6-Pole Round to 4-Wire Flat Adapter with Flexible Wires (47315) by Hopkins Towing®. Specially designed for horse trailers or utility/cargo trailers fitted with electric brakes, this awesome cable provides such functions as...Plug-In Simple!® AdapterIncludes Dust Cover$11.94
- Hopkins Towing®60" Tail Light Converter with Molded Terminals (48915)Universal 60" Tail Light Converter with Molded Terminals (48915) by Hopkins Towing®. Package. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer must have a...Electronic Taillight Converter adapts tow vehicles taillight system to the trailer'sPowers up to 2.1 amps per output$22.43
- Hopkins Towing®7 Blade to 7 Round Connector with Flexible Wires (47595)Universal 7 Blade to 7 Round Connector 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,...Plug-In Simple!® AdapterDie-cast zinc for durability$36.04
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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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