Trailer Hitch Wiring & Electrical
![Hitch Wiring](https://ic.carid.com/pages/hitch-wiring/hitch-wiring_0.jpg)
- FulTyme RV®7-Way Flat Blade Round RV-Style Connector (2015)Universal 7-Way Flat Blade Round RV-Style Connector (2015) by FulTyme RV®. Connects auxiliary, tail lights, ground, left, right and stop. This top-grade product is expertly made in compliance with stringent industry standards to offer a...Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come$14.60
- FulTyme RV®7-Way Round USCAR Style Connector (2014)Universal 7-Way Round USCAR Style Connector (2014) by FulTyme RV®. Connects auxiliary, tail lights, ground, left, right and stop. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion...Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come$18.03
- FulTyme RV®7-Way Round to 4-Way Flat Adapter (1002)Universal 7-Way Round to 4-Way Flat Adapter by FulTyme RV®. Length: 8". 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....Durable molded plastic housing resists corrosionFlat blade brass terminals to flat pin-style$3.58
- FulTyme RV®7-Way Round to 4-Way Flat Trailer Connector (1005)Universal 7-Way Round to 4-Way Flat Trailer Connector (1005) by FulTyme RV®. Connects auxiliary, tail lights, ground, left, right and stop. This top-grade product is expertly made in compliance with stringent industry standards to offer...Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come$11.15
- FulTyme RV®7-Way Round to 5-Way Flat Trailer Connector (1004)Universal 7-Way Round to 5-Way Flat Trailer Connector (1004) by FulTyme RV®. Connects auxiliary, tail lights, ground, left, right and stop. This top-grade product is expertly made in compliance with stringent industry standards to offer...Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come$12.98
- FulTyme RV®8" 7-Way Round to 5 Way Flat Adapter (1007)Universal 8" 7-Way Round to 5 Way Flat Adapter by FulTyme RV®. Length: 8". 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...Ideal to make trailer towing safer and easierMade from the highest-quality materials to last for years to come$15.62
- Grote®Marine Terminal (82-9541)Marine Terminal (82-9541) by Grote®. Material: Lead. 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 Grote will last a...Converts battery post to stud connectorPermits quick disconnection from battery$6.51
- Grote®Marine Terminal (82-9542)Marine Terminal (82-9542) by Grote®. Material: Lead. 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 Grote will last a...Converts battery post to stud connectorPermits quick disconnection from battery$6.51
- Grote®Quick Connector With Cap (82-9595)Quick Connector With Cap (82-9595) by Grote®. 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 Grote will last a...Expertly crafted from premium materialsDesigned to match rigorous quality standards$11.04
- Grote®Side Terminal (82-9596)Side Terminal by Grote®. Material: Copper/Brass Plated. 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 Grote will...Side Terminal fits Positive or NegativeTop Post clamp style fits negative terminal$19.81
- IPA®3-Way Trailer Adapter (8000)3-Way Trailer Adapter by IPA®. 3-Way Trailer Adapter by IPA™. 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. It will meet your...High quality at an affordable priceExpertly made from premium materials$22.46
- IPA®7 Round Pin Towing Maintenance Kit (8029)7 Round Pin Towing Maintenance Kit by IPA®. 7 Round Pin Towing Maintenance Kit by IPA™. The 7-way Round Pin Towing Maintenance Kit provides the tools necessary to keep tractors and trailers on the road. The innovative set includes a 7...Tests tractor electrical circuitsTests trailer lights including turning light signals, brake lights and more!$50.96
- IPA®7 Round Pin Tractor Trailer Circuit Tester (7865L)7 Round Pin Tractor Trailer Circuit Tester by IPA®. One person can now test all. The 7 Round Pin Tractor Trailer Circuit Tester does "one-man testing" for male and female 7 round pin tractor trailer plugs and much more. It allows the...Troubleshoot tractor trailer circuitsOne person can now test all the lighting$33.71
- IPA®7 Way Flat Pin Trailer Circuit Tester (7893)7 Way Flat Pin Trailer Circuit Tester by IPA®. 7 Way Flat Pin Trailer Circuit Tester by IPA™. 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...Quickly and easily test trailer circuits on most light to medium duty trucks and cAersTests vehicle circuits on 7 Flat/Spade Pin connections - quickly identifies faulty circuits$23.96
- IPA®Heavy Duty Trailer Tester (9102)Heavy Duty Trailer Tester by IPA®. The Heavy Ranger MUTT™ is a commercial trailer light and electric brakes tester that reduces guesswork and saves time by powering each trailer electrical circuit in 7-way round pin arrangements. This...Test 7-way round pinShort circuit protection$164.96
- IPA®Light Ranger Mutt Trailer Tester (9101)Light Ranger Mutt Trailer Tester by IPA®. Light Ranger Mutt Trailer Tester by IPA™. The Light Ranger is a portable and water resistant trailer tester which allows the user to perform all testing functions without the use of the truck....Tests 7-spade, 6-round and 4/5-flat pin type trailer harnessesShort circuit protection$164.96
- IPA®Multi Trailer Tester Jobber Pack (TSTPK1)Multi Trailer Tester Jobber Pack by IPA®. Multi Trailer Tester Jobber Pack by IPA™. 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....Troubleshoot tractor trailer circuitsAllows bypassing of troubled circuitry while on the road$112.46
- IPA®Spade Trailer Socket Cleaner (8025)Spade Trailer Socket Cleaner by IPA®. Spade Trailer Socket Cleaner 4 5 6 7 8025 by IPA™. TERMINAL CONNECTOR CLEANERS FOR 4, 5, 6, 7 WAY TRAILER CONNECTORS & MORE! Maintenance Tools For Automotive Connectors & Terminals. The 1st...For male/female truck and trailer connectionsMaintains continuity and prevents circuit failure$49.46
- IPA®Truck and Trailer Terminal Cleaner Set (8044)Truck and Trailer Terminal Cleaner Set by IPA®. Truck and Trailer Terminal Cleaner Set 8044 by IPA™. The 6-piece set is designed to clean ALL North American Truck & Trailer Towing Connectors. The unique patented design allows for...4/5 Pin Terminal Cleaners6-Way Round Pin Terminal Cleaners$86.21
- JR Products®15" Pigtail LP Gas Hose (ACME Nut to 1/4" Male Thread) (07-30855)15" Pigtail LP Gas Hose (ACME Nut to 1/4" Male Thread) (07-30855) by JR Products®. Quantity: 1 Piece. Perfect for replacing your worn-out or malfunctioning part, this product will help make having fuel on the go convenient and safe....UL/CSA ApprovedBuilt to deliver excellent levels of quality and convenience$26.97
- RV Designer®6-Way Round Plug to 7-Way Trailer Socket Harness Adapter (P725)6-Way Round Plug to 7-Way Trailer Socket Harness Adapter by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions...Created by professionals to meet your requirementsManufactured with cutting-edge technology$17.84
- RV Designer®6-Way Round to 4-Way Flat Trailer Connector Adapter (P717)6-Way Round to 4-Way Flat Trailer Connector Adapter (P717) by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible...Created by professionals to meet your requirementsManufactured with cutting-edge technology$11.24
- RV Designer®7-Way Heavy Duty Socket Mounting Bracket (P771)Universal 7-Way Heavy Duty Socket Mounting Bracket by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions for...Created by professionals to meet your requirementsManufactured with cutting-edge technology$3.66
- RV Designer®7-Way Socket Mounting Bracket (P701)7-Way Socket Mounting Bracket by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions for your needs. All...Created by professionals to meet your requirementsManufactured with cutting-edge technology$4.96
- RV Designer®7-Way to 5-Way Flat Trailer Connector Adapter (P718)7-Way to 5-Way Flat Trailer Connector Adapter (P718) by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions for...Created by professionals to meet your requirementsManufactured with cutting-edge technology$19.02
- RV Designer®7-Way to 6-Way Round Trailer Connector Adapter with Auxiliary Pin in Center (P729)7-Way to 6-Way Round Trailer Connector Adapter with Auxiliary Pin in Center (P729) by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide...Created by professionals to meet your requirementsManufactured with cutting-edge technology$11.27
- RV Designer®7-Way to 6-Way Round Trailer Connector Adapter with Brake Pin in Center (P719)7-Way to 6-Way Round Trailer Connector Adapter with Brake Pin in Center (P719) by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the...Created by professionals to meet your requirementsManufactured with cutting-edge technology$15.19
- RV Designer®Black 7-Way Socket Mounting Bracket (P711)Universal Black 7-Way Socket Mounting Bracket by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions for your...Created by professionals to meet your requirementsManufactured with cutting-edge technology$6.15
- RV Designer®Cable and Connector Assemly (P117)Cable and Connector Assemly by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible solutions for your needs. All products...Created by professionals to meet your requirementsManufactured with cutting-edge technology$48.28
- RV Designer®Chrome Plated 4-Way Trailer Connector Plug (P409)Universal Chrome Plated 4-Way Trailer Connector Plug (P409) by RV Designer®. 1 Piece. RV Designer is here with excellent products that are available at a competitive price. The company does its utmost to provide the best possible...Created by professionals to meet your requirementsManufactured with cutting-edge technology$5.61
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.
Featured Brands
Related Categories
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