Trailer Hitch Wiring & Electrical
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- CURT®4-Way Flat Connector Plug and SocketUniversal 4-Way Flat Connector Plug and Socket 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...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$4.64 - $12.65
- CURT®4-Way Flat Connector SocketUniversal 4-Way Flat Connector Socket 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 a...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.41 - $9.99
- CURT®4-Way Flat Connector TesterUniversal 4-Way Flat Connector Tester by CURT®. Material: Plastic. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely and legally....Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$5.14 - $7.40
- CURT®4-Way Flat Dual-Output Electrical AdapterUniversal 4-Way Flat Dual-Output Electrical Adapter 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 bare...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$29.06 - $35.69
- CURT®4-Way Flat Electrical Adapter with TesterUniversal 4-Way Flat Electrical Adapter with Tester 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 bare...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$27.66 - $30.30
- CURT®4-Way Flat License Plate Light Plug Connector SocketUniversal 4-Way Flat License Plate Light Plug Connector Socket by CURT®. Length: 36". 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$6.26 - $9.91
- CURT®4-Way Flat to Round AdapterUniversal 4-Way Flat to Round Adapter 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 bare essentials -...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$19.29 - $23.31
- CURT®4-Way Round ConnectorUniversal 4-Way Round Connector 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 a solid...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.26 - $17.78
- CURT®4-Way Round to 4-Way Flat AdapterUniversal 4-Way Round to 4-Way Flat Adapter 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 bare essentials...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$5.56 - $9.38
- CURT®5-Way Flat ConnectorUniversal 5-Way Flat Connector 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 a solid...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$9.64 - $17.53
- CURT®6-Way Round ConnectorUniversal 6-Way Round Connector 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 a solid...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.43 - $18.93
- CURT®6-Way Round Connector Plug with SpringUniversal 6-Way Round Connector Plug with Spring by CURT®. Material: Die-Cast. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$8.67 - $11.52
- CURT®6-Way Round to 4-Way Flat AdapterUniversal 6-Way Round to 4-Way Flat Adapter 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 bare essentials...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$7.03 - $12.62
- CURT®6-Way Square ConnectorUniversal 6-Way Square Connector 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 a solid...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.57 - $10.30
- CURT®7-Pole Round to 4 Flat AdapterUniversal 7-Pole Round to 4 Flat Adapter by CURT®. Adapts 7-way round vehicle-end to 4-way flat trailer-end. Product: Electrical Adapter. Material: Plastic. There are several different types of connectors used to supply power from a tow...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$9.02 - $11.31
- CURT®7-Way RV Blade ConnectorUniversal 7-Way RV Blade Connector 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 a...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.83 - $17.78
- CURT®7-Way RV Blade Connector TesterUniversal 7-Way RV Blade Connector Tester by CURT®. Material: Plastic. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely and...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$14.03 - $17.95
- CURT®7-Way RV Blade Electrical AdapterUniversal 7-Way RV Blade Electrical Adapter 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 bare essentials...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$7.60 - $14.03
- CURT®7-Way RV Blade Electrical Adapter with Backup AlarmUniversal 7-Way RV Blade Electrical Adapter with Backup Alarm 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...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.65 - $22.84
- CURT®7-Way RV Blade Electrical Adapter with TesterUniversal 7-Way RV Blade Electrical Adapter with Tester 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 bare...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$13.02 - $17.81
- CURT®7-Way RV Blade Replacement HarnessUniversal 7-Way RV Blade Replacement Harness 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...Precisely welded for a perfect fit and functionProtected by an industry-leading, dual-coat finish - inside and out$34.98 - $54.85
- CURT®7-Way Round ConnectorUniversal 7-Way Round Connector 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 a solid...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$15.08 - $16.46
- CURT®7-Way Round Connector with SpringUniversal 7-Way Round Connector with Spring 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...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$17.76 - $18.04
- CURT®Butt ConnectorUniversal Butt Connector 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 a solid...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$12.01 - $17.49
- CURT®Circuit BreakerUniversal Circuit Breaker by CURT®. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely and legally. For any towing setup, CURT...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$4.59 - $5.73
- CURT®Cold-Weather Replacement 7-Way RV Blade HarnessUniversal Cold-Weather Replacement 7-Way RV Blade Harness by CURT®. The wind cuts and the frost bites, but you never let that stop you before. You've got miles to cover and work to get done. When the freezing temperatures of the cold...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$47.19 - $65.22
- CURT®Convoluted Slit Loom TubingUniversal Convoluted Slit Loom Tubing by CURT®. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need working trailer lights to tow safely and legally. For any towing...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$0.35 - $15.24
- CURT®Insulated Ring TerminalUniversal Insulated Ring Terminal by CURT®. 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 trailer's electrical functions are,...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$12.60 - $18.59
- CURT®Insulated Spade TerminalUniversal Insulated Spade Terminal by CURT®. 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 trailer's electrical functions are,...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$12.60 - $16.76
- CURT®Quick ConnectorsUniversal Quick Connectors 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 a solid...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$14.34 - $16.07
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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