Semi Truck Hitch Wiring
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CURT®ConnectorsConnectors by CURT®. A CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring....Creates a safe, reliable connection between your tow vehicle and your trailerTested in-house for safety$15.28 - $40.16Save: 5%$14.51 - $38.15 - Tectran®DOUBLEDUAL™ PowercoilUniversal DOUBLEDUAL™ Powercoil by Tectran®. AN INDUSTRY FIRST - TECTRAN'S ONE-PLUG SOLUTION! A dual pole plug that is universally configured to function with both vertical and horizontal socket designs. One plug handles all your dual...Rugged jacket resistant to abrasion, gasoline, diesel, and road chemicalsDurable Die-cast Buffalo plugs$189.61 - $209.28
- Tectran®7-Way Bull Nose Poly Circuit Breaker SocketUniversal 7-Way Bull Nose Poly Circuit Breaker Socket by Tectran®. 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....Machined brass terminal pins for maximum current carrying abilityField repairable with standard tools$48.44 - $54.95
- Tectran®7-Way Medium Duty Bronze PowercoilUniversal 7-Way Medium Duty Bronze Powercoil by Tectran®. A unique cable configuration that utilizes 12-gauge conductors for the heavily loaded stop lamp (red) and ground (white) circuits while providing the economy of 14-gauge...Extremely flexible with excellent coil memory, even in brutally cold conditions as low as -85°F (-65°C)High strand count copper conductors with machine crimped brass terminals for dependable electrical connections$74.81 - $109.56
- Tectran®7-Way Poly Housing SocketUniversal 7-Way Poly Housing Socket by Tectran®. 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...Built to offer superior performance for a long timeMade to bring exceptional durability and reliability$19.16 - $31.41
- Tectran®7-Way SAE Auxiliary PlugUniversal 7-Way SAE Auxiliary Plug by Tectran®. 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...Meets auxiliary connector performance requirements of SAE J560 (replaces ISO 3731)For use with secondary cable for auxiliary power requirements$19.84 - $29.37
- Tectran®7-Way SAE Bull Nose Socket AssemblyUniversal 7-Way SAE Bull Nose Socket Assembly by Tectran®. 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...Durable, zinc, die cast housing for rugged useMeets all performance requirements of SAE J560$17.57 - $49.97
- Tectran®7-Way Sockets with Bull Nose Circuit Breaker SocketUniversal 7-Way Sockets with Bull Nose Circuit Breaker Socket by Tectran®. 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...Durable, zinc, die cast housing for rugged useMachined brass terminal pins for maximum current carrying ability$24.82 - $35.65
- Tectran®Dual Pole Buffalo Plug and Bull Nose Sockets Plug Assembly with Spring GuardUniversal Dual Pole Buffalo Plug and Bull Nose Sockets Plug Assembly with Spring Guard by Tectran®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and...Polarized Contacts200 amp capacity$21.56 - $23.33
- Tectran®Light Duty 7-Way Blade Style RV PlugUniversal Light Duty 7-Way Blade Style RV Plug by Tectran®. 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....Provides customers with an alternate to screw terminationStandard 1/4" spade connector will replace the screws for a quick connect version$13.45 - $16.55
- Tectran®NoseboxUniversal Nosebox by Tectran®. 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 industry-leading...All parts supplied with rear mounting gasketCable Strain Relief Fitting sold separately$14.88 - $68.51
- Tectran®Plug AssemblyUniversal Plug Assembly by Tectran®. 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 industry-leading...Now Featuring Buffalo Plug & Bull Nose Socket DesignBuilt to offer superior performance for a long time$9.27 - $12.74
- Tectran®Socket AssemblyUniversal Socket Assembly by Tectran®. 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...Now Featuring Buffalo Plug & Bull Nose Socket DesignBuilt to offer superior performance for a long time$11.50 - $12.00
- Tectran®Sockets BootUniversal Sockets Boot by Tectran®. 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 industry-leading...Built to offer superior performance for a long timeMade to bring exceptional durability and reliability$2.00 - $2.35
- Tectran®Tailgate Connectors Plug Assembly with Spring GuardUniversal Tailgate Connectors Plug Assembly with Spring Guard by Tectran®. 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...Plug assembly comes with a plated copper grounding lugPlug grounding lug accepts 2 ga. cable$19.35 - $29.08
- Tectran®Tarp Systems Connectors Dual Pole Vertical Plug Assembly with Spring GuardUniversal Tarp Systems Connectors Dual Pole Vertical Plug Assembly with Spring Guard by Tectran®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and...Polarized contacts200 amp capacity$21.24 - $21.49
- CURT®ATC FuseUniversal ATC Fuse 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...Precisely welded for a perfect fit and functionProtected by an industry-leading, dual-coat finish - inside and out$39.20Save: 5%$37.24
- CURT®AdaptersAdapters 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 - running lights, brake lights and...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$15.45 - $16.71Save: 5%$14.68 - $15.87
- Husky Towing®Trailer Wiring ConnectorTrailer Wiring Connector by Husky Towing®.Impact And Corrosion ResistantEasy-Pull Grip Design$7.30 - $58.52
- Peterson®Trailer ConnectorUniversal Trailer Connector by Peterson®. Std. Carton 6. Packaging Type: Viz Pack. 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...Built to deliver excellent performance and functionalityWill serve you for as long as possible$12.96 - $15.88
- Phillips Industries®Dual Pole SocketUniversal Dual Pole Socket by Phillips Industries®. 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...Zinc die-cast housing for durabilitySolid brass pins$31.44
- Phillips Industries®Single Pole SocketUniversal Single Pole Socket by Phillips Industries®. 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...Zinc die-cast housing for durabilitySolid brass pins$21.78
- RV Pigtails®Connector AdapterUniversal Connector Adapter by RV Pigtails®. 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...Designed to meet the highest quality standardsBuilt to offer superior performance for a long time$14.91 - $34.35
- RV Pigtails®Pigtail Wiring Connector AdapterUniversal Pigtail Wiring Connector Adapter by RV Pigtails®. Base Color: Black. 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...Designed to meet the highest quality standardsBuilt to offer superior performance for a long time$18.56 - $75.28
- Truck-Lite®2 Plug Identification and License Wiring HarnessUniversal 2 Plug Identification and License Wiring Harness by Truck-Lite®. 14 Gauge. Female 0.180 Bullet, 0.180 Bullet. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the...Dimensions ''A'' indicate standard stocked length harnessCustom length available in 12'' increments.$8.57 - $31.98
- Truck-Lite®50 Series 1 Plug Turn/Tail Wiring HarnessUniversal 50 Series 1 Plug Turn/Tail Wiring Harness by Truck-Lite®. 14 Gauge. 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...Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments$40.83 - $56.61
- Truck-Lite®50 Series 3 Plug Identification Wiring HarnessUniversal 50 Series 3 Plug Identification Wiring Harness by Truck-Lite®. 14 Gauge. PL-10, Blunt Cut. This product is made from high-grade materials to meet the strictest standards of high quality. Designed with the utmost care and...Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments$21.79 - $53.75
- Truck-Lite®50 Series 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance BreakoutUniversal 50 Series 3 Plug Marker Clearance and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance Breakout by Truck-Lite®. This product is made from high-grade materials to meet the strictest standards of high...Expertly crafted from superior materialsProvides exceptional reliability$49.22 - $83.42
- Truck-Lite®50 Series 3 Plug Stop/Turn/Tail and Back-Up Wiring Harness with Stop/Turn/Tail BreakoutUniversal 50 Series 3 Plug Stop/Turn/Tail and Back-Up Wiring Harness with Stop/Turn/Tail Breakout by Truck-Lite®. 14 Gauge. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a...Dimensions ''A'' indicate standard stocked length harnessA range of custom length harnesses are available in 12'' increments$48.01 - $56.33
- Truck-Lite®50 Series Marker Clearance Wiring HarnessUniversal 50 Series Marker Clearance Wiring Harness by Truck-Lite®. 14 Gauge. 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...Expertly crafted from superior materialsProvides exceptional reliability$16.63 - $74.28
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.
