Trailer Hitch Wiring & Electrical

Hitch Wiring
  • Truck-Lite® - 88 Series Identification Wiring Harness
    Truck-Lite®88 Series Identification Wiring Harness
    0
    # 88831117
    Universal 88 Series Identification 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...
    High quality at an affordable priceExpertly made from premium materials
    $23.58 - $68.43
  • Truck-Lite® - 88 Series Main Cable Wiring Harness
    Truck-Lite®88 Series Main Cable Wiring Harness
    0
    # 88831107
    Universal 88 Series Main Cable Wiring Harness by Truck-Lite®. 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 Truck-Lite product...
    High quality at an affordable priceExpertly made from premium materials
    $52.01 - $328.50
  • Truck-Lite® - 88 Series Marker Clearance Wiring Harness
    Truck-Lite®88 Series Marker Clearance Wiring Harness
    0
    # 96917070
    Universal 88 Series Marker Clearance Wiring Harness by Truck-Lite®. 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 Truck-Lite...
    High quality at an affordable priceExpertly made from premium materials
    $13.15 - $30.26
  • CURT® - 12V Turn Signal Flasher
    CURT®12V Turn Signal Flasher
    1
    # 470452807
    Universal 12V Turn Signal Flasher 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,...
    Splices into the vehicle’s wiring to provide a connection for a trailer plugProudly made in Wisconsin, from start to finish
    $3.90 - $4.27
  • CURT® - 4-Way Flat Connector Dust Cover
    CURT®4-Way Flat Connector Dust Cover
    1
    # 470473640
    Universal 4-Way Flat Connector Dust Cover 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
    $0.62 - $4.45
  • CURT® - 4-Way Flat Connector Tester
    CURT®4-Way Flat Connector Tester
    1
    # 566258936
    Universal 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 Adapter
    CURT®4-Way Flat Dual-Output Electrical Adapter
    4
    # 470457652
    Universal 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
    $26.50 - $38.55
  • CURT® - 4-Way Flat Electrical Adapter with Tester
    CURT®4-Way Flat Electrical Adapter with Tester
    4
    # 566246938
    Universal 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 to Round Adapter
    CURT®4-Way Flat to Round Adapter
    4
    # 470439781
    Universal 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 to 4-Way Flat Adapter
    CURT®4-Way Round to 4-Way Flat Adapter
    4
    # 589069727
    Universal 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® - 6-Way Round Connector Plug with Spring
    CURT®6-Way Round Connector Plug with Spring
    1
    # 470437811
    Universal 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 Adapter
    CURT®6-Way Round to 4-Way Flat Adapter
    4
    # 470473661
    Universal 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® - 7-Pole Round to 4 Flat Adapter
    CURT®7-Pole Round to 4 Flat Adapter
    4
    # 470438804
    Universal 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 Connector Tester
    CURT®7-Way RV Blade Connector Tester
    1
    # 566238936
    Universal 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
    $13.94 - $17.95
  • CURT® - 7-Way RV Blade Electrical Adapter
    CURT®7-Way RV Blade Electrical Adapter
    4
    # 470432804
    Universal 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 Alarm
    CURT®7-Way RV Blade Electrical Adapter with Backup Alarm
    4
    # 604404856
    Universal 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 Tester
    CURT®7-Way RV Blade Electrical Adapter with Tester
    4
    # 589092734
    Universal 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® - Circuit Breaker
    CURT®Circuit Breaker
    1
    # 1581004660
    Universal 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 Harness
    CURT®Cold-Weather Replacement 7-Way RV Blade Harness
    1
    # 470462704
    Universal 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 Tubing
    CURT®Convoluted Slit Loom Tubing
    1
    # 537070530
    Universal 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® - Non-powered 3-to-2-Wire Tail Light Converter
    CURT®Non-powered 3-to-2-Wire Tail Light Converter
    2
    # 810177795
    Universal Non-powered 3-to-2-Wire Tail Light Converter by CURT®. 2.1 Amp Turn/Brake, 5 Amp Tail Light. Quantity per Package: 1. 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
    $14.32 - $21.17
  • CURT® - Powered 3-to-2-Wire Tail Light Converter
    CURT®Powered 3-to-2-Wire Tail Light Converter
    2
    # 810168820
    Universal Powered 3-to-2-Wire Tail Light Converter by CURT®. 3 Amp Turn/Brake, 6 Amp Tail Light. Quantity per Package: 1. One Year Limited. When your vehicle does not readily provide an electrical connection for hooking up your trailer,...
    Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety
    $36.13 - $57.44
  • CURT® - Powered 3-to-2-Wire Tail Light Converter
    CURT®Powered 3-to-2-Wire Tail Light Converter
    2
    # 753309826
    Universal Powered 3-to-2-Wire Tail Light Converter by CURT®. Quantity per Package: 1. When your vehicle does not readily provide an electrical connection for hooking up your trailer, CURT electrical converts offer the solution. Working...
    Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety
    $30.76 - $59.56
  • CURT® - Powered Converter Wiring Kit
    CURT®Powered Converter Wiring Kit
    2
    # 387051442
    Universal Powered Converter Wiring Kit by CURT®. 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 electrical converts...
    Uses plug-and-play connectors and provides a standard trailer wiring outputTested in-house for safety
    $17.61
  • Hopkins Towing® - 12-Volt Power Socket
    Hopkins Towing®12-Volt Power Socket
    7
    # 267977260
    Universal 12-Volt Power Socket 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 system...
    Splice onto tow vehicle's wiring systemCorrosion resistant terminals
    $15.06 - $23.14
  • Hopkins Towing® - 4-Pole Round Connector
    Hopkins Towing®4-Pole Round Connector
    0
    # 470481635
    Universal 4-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,...
    Multi-Tow™ provides multiple towing options from one connectorPlug-In Simple Wiring Kit
    $4.87 - $7.31
  • Hopkins Towing® - 4-Wire Bonded Wire Spool
    Hopkins Towing®4-Wire Bonded Wire Spool
    7
    # 464408620
    Universal 4-Wire Bonded Wire Spool 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...
    Splice onto tow vehicle's wiring systemCorrosion resistant terminals
    $16.58 - $88.90
  • Hopkins Towing® - 4-Wire Flat Connector
    Hopkins Towing®4-Wire Flat Connector
    0
    # 464408532
    Universal 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,...
    Multi-Tow™ provides multiple towing options from one connectorPlug-In Simple Wiring Kit
    $1.84 - $5.65
  • Hopkins Towing® - 4-Wire Flat Connector Set
    Hopkins Towing®4-Wire Flat Connector Set
    0
    # 464407811
    Universal 4-Wire Flat Connector Set 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,...
    Multi-Tow™ provides multiple towing options from one connectorPlug-In Simple Wiring Kit
    $4.15 - $4.89
  • Hopkins Towing® - 4-Wire Flat Connector Set with Splices
    Hopkins Towing®4-Wire Flat Connector Set with Splices
    0
    # 464407730
    Universal 4-Wire Flat Connector Set with Splices 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,...
    Multi-Tow™ provides multiple towing options from one connectorPlug-In Simple Wiring Kit
    $4.41 - $5.06




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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Hitch Electrical & Wiring Reviews

141 reviews
4 of 5
Easy to install
CURT® - T-Connector
This is replacing one that I installed about 5 years ago and quit working. I wish it would have lasted longer but the fact that it is plug and play made the replacement not so difficult.
Posted by Customer / June 03, 20212016 Kia Sedona
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