Trailer Hitch Wiring & Electrical
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- Truck-Lite®88 Series 1.25" 3 Plug Marker Clearance Wiring Harness (88342)Universal 88 Series 1.25" 3 Plug Marker Clearance Wiring Harness (88342) by Truck-Lite®. 14 Gauge. Female 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$16.44
- Truck-Lite®88 Series 192" Upper 3 Plug Identification Wiring Harness (88301)Universal 88 Series 192" Upper 3 Plug Identification Wiring Harness (88301) by Truck-Lite®. 14 Gauge. PL-10, 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.$38.76
- Truck-Lite®88 Series 22" 1 Plug Main Cable Wiring Harness (88810)Universal 88 Series 22" 1 Plug Main Cable Wiring Harness (88810) by Truck-Lite®. 10, 12 Gauge. Female 7 Pole Plug, Butt Splice. This product is made from high-grade materials to meet the strictest standards of high quality. Designed...Dimensions ''A'' indicate standard stocked length harnessCustom length available in 12'' increments.$52.01
- Truck-Lite®88 Series 30" 2 Plug Marker Clearance Wiring Harness (88307)Universal 88 Series 30" 2 Plug Marker Clearance Wiring Harness (88307) by Truck-Lite®. 14 Gauge. PL-10, 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.$14.07
- Truck-Lite®88 Series 55" Rear 15 Plug License and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance and Auxiliary and Tail Breakout (88911)Universal 88 Series 55" Rear 15 Plug License and Stop/Turn/Tail Wiring Harness with Stop/Turn/Tail and Marker/Clearance and Auxiliary and Tail Breakout (88911) by Truck-Lite®. 14 Gauge. Male 7 Pole Plug, Right Angle PL-3, Female 0.180...Expertly crafted from superior materialsProvides exceptional reliability$133.78
- Truck-Lite®88 Series 56" Lower 4 Plug Identification Wiring Harness (88300)Universal 88 Series 56" Lower 4 Plug Identification Wiring Harness (88300) by Truck-Lite®. 14 Gauge. PL-10, 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.$26.28
- Truck-Lite®88 Series 715" 1 Plug Main Cable Wiring Harness (88701)Universal 88 Series 715" 1 Plug Main Cable Wiring Harness (88701) by Truck-Lite®. 10, 12 Gauge. Female 7 Pole Plug, Ring Terminal. This product is made from high-grade materials to meet the strictest standards of high quality. Designed...Dimensions ''A'' indicated standard stocked length harnessCustom length available in 12'' increments.$216.12
- CURT®1' Convoluted Slit Loom Tubing (1/2" Diam) (59826)Universal 1' Convoluted Slit Loom Tubing (59826) by CURT®. Bulk. Diameter: 1/2". Per Foot. Protects loose wires against vibration or crushing. Color: Black. Whether you're a contractor on your way to the jobsite or just a casual...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$0.53
- CURT®1' Convoluted Slit Loom Tubing (3/8" Diam) (59824)Universal 1' Convoluted Slit Loom Tubing (59824) by CURT®. Bulk. Diameter: 3/8". Per Foot. Protects loose wires against vibration or crushing. Color: Black. Whether you're a contractor on your way to the jobsite or just a casual...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$0.37
- CURT®10' 7-Way Cold-Weather Replacement RV Blade Harness (56613)Universal 10' 7-Way Cold-Weather Replacement RV Blade Harness (56613) by CURT®. Package type: Bulk. Replaces a trailer-end 7-way RV blade plug. Soft casing remains flexible in cold temperatures. Length: 10 ft. Temperature Rating: -40F...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$65.22
- CURT®10-12 Gauge Wire Snap Locks (59905)Universal 10-12 Gauge Wire Snap Locks (59905) by CURT®. Pack of 100. Splices wires together without stripping or soldering. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing,...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$29.19
- CURT®12V Turn Signal Flasher with 1-4 Lamps or 2-8 Hazards (58310)Universal 12V Turn Signal Flasher with 1-4 Lamps or 2-8 Hazards (58310) by CURT®. Operates 1-4 lamps or 2-8 hazards. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$3.90
- CURT®12V Turn Signal Flasher with 2-3 Lamps or 4-6 Hazards (58320)Universal 12V Turn Signal Flasher with 2-3 Lamps or 4-6 Hazards (58320) by CURT®. Operates 2-3 lamps or 4-6 hazards. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$4.27
- CURT®18-14 Gauge Wire Snap Locks (59906)Universal 18-14 Gauge Wire Snap Locks (59906) by CURT®. Without Gel Sealant. Color: White. Pack of 100. Splices wires together without stripping or soldering. Whether you're a contractor on your way to the jobsite or just a casual...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$21.90
- CURT®2-to-3-Wire Tail Light Converter (56196)Universal 2-to-3-Wire Tail Light Converter by CURT®. Converts 2-wire system to 3-wire system. Turn and Brake Circuits: 2.1 Amps Per Circuit. When your vehicle does not readily provide an electrical connection for hooking up your...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$28.46
- CURT®24-Volt Tail Light Converter (56424)Universal 24-Volt Tail Light Converter by CURT®. When your vehicle does not readily provide an electrical connection for hooking up your trailer, CURT electrical converts offer the solution. Working tail lights on your trailer are...Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety$39.06
- CURT®3/8" White Nylon Loom Clamp (59828)Universal 3/8" White Nylon Loom Clamp by CURT®. Pack of 25. Product: Loom Clamp. Color: White. 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...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$3.16
- CURT®4-Way Flat Connector Dust Cover (58200)Universal 4-Way Flat Connector Dust Cover (58200) by CURT®. Bulk. Fits vehicle-end 4-way flat connector socket. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat landing, you need...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$0.62
- CURT®4-Way Flat Connector Tester (58260)Universal 4-Way Flat Connector Tester (58260) by CURT®. Bulk. Material: Plastic. Confirms the vehicle and trailer are properly wired. Whether you're a contractor on your way to the jobsite or just a casual fisherman heading to the boat...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$5.14
- CURT®4-Way Flat Dual-Output Electrical Adapter (57672)Universal 4-Way Flat Dual-Output Electrical Adapter (57672) by CURT®. 7-Way Round and 4-Way Flat. Adapts 4-way flat vehicle-end to 7-way RV blade and 4-way flat trailer-end. Includes mounting bracket and hardware. Product: Duplex...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$31.58
- CURT®4-Way Flat Dual-Output Electrical Adapter with Tester (57674)Universal 4-Way Flat Dual-Output Electrical Adapter with Tester (57674) by CURT®. 7-Way Round and 4-Way Flat. Adapts 4-way flat vehicle-end to 7-way RV blade and 4-way flat trailer-end. Includes LED electrical tester, mounting bracket...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$35.69
- CURT®4-Way Flat Dual-Output Electrical Adapter with Tester (57624)Universal 4-Way Flat Dual-Output Electrical Adapter with Tester (57624) by CURT®. 6-Way Round and 4-Way Flat. Adapts 4-way flat vehicle-end to 6-way round and 4-way flat trailer-end. Includes LED electrical tester, mounting bracket and...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$29.06
- CURT®4-Way Flat Electrical Adapter with Brake Control Wiring (57186)Universal 4-Way Flat Electrical Adapter with Brake Control Wiring by CURT®. Adapts 4-way flat vehicle-end to 7-way RV blade trailer-end and adds a brake control connection. Product: Electrical Adapter. There are several different types...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$72.91
- CURT®4-Way Flat to 6-Way Round Electrical Adapter (57183)Universal 4-Way Flat to 6-Way Round Electrical Adapter (57183) by CURT®. Adapts 4-way flat vehicle-end to 6-way round trailer-end. Product: Electrical Adapter. Material: Die-Cast. There are several different types of connectors used to...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$20.83
- CURT®4-Way Flat to 6-Way Round Electrical Adapter with Tester To 6-way Round Trailer-End with Integrated Test Lamps (57626)Universal 4-Way Flat to 6-Way Round Electrical Adapter with Tester To 6-way Round Trailer-End with Integrated Test Lamps (57626) by CURT®. Plastic. Adapts 4-way flat vehicle-end to 6-way round trailer-end. Includes LED electrical...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$27.66
- CURT®4-Way Flat to 7-Way Round Electrical Adapter (57184)Universal 4-Way Flat to 7-Way Round Electrical Adapter (57184) by CURT®. Adapts 4-way flat vehicle-end to 7-way RV blade trailer-end. Product: Electrical Adapter. Material: Plastic. There are several different types of connectors used...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$19.29
- CURT®4-Way Flat to 7-Way Round Electrical Adapter with Mounting Bracket (57185)Universal 4-Way Flat to 7-Way Round Electrical Adapter with Mounting Bracket (57185) by CURT®. Material: Die-Cast. Adapts 4-way flat vehicle-end to 7-way RV blade trailer-end. Includes mounting bracket. Product: Electrical Adapter....Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$23.31
- CURT®4-Way Flat to 7-Way Round Electrical Adapter with Tester to 7-way RV Blade (57676)Universal 4-Way Flat to 7-Way Round Electrical Adapter with Tester to 7-way RV Blade (57676) by CURT®. Plastic. Adapts 4-way flat vehicle-end to 7-way RV blade. Includes LED electrical tester, mounting bracket and hardware. Product:...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$30.30
- CURT®4-Way Round to 4-Way Flat Electrical Adapter (57224)Universal 4-Way Round to 4-Way Flat Electrical Adapter (57224) by CURT®. With Extender. Bulk. Material: Plastic. Fits Light Duty Sockets. Adapts 4-way round vehicle-end to 4-way flat trailer-end. Product: Electrical Adapter. Material:...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$6.41
- CURT®4-Way Round to 4-Way Flat Electrical Adapter (58414)Universal 4-Way Round to 4-Way Flat Electrical Adapter (58414) by CURT®. Without Extender. Bulk. Material: Plastic. Adapts 4-way round vehicle-end to 4-way flat trailer-end. Product: Electrical Adapter. Material: Plastic. There are...Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish$5.56
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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Weight Distribution
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