Trailer Hitch Wiring & Electrical
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- Hopkins Towing®6-Pole Round Car End Connector (48435)Universal 6-Pole Round Car End Connector (48435) by Hopkins Towing®. Material: Metal. 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...Corrosion Resistant TerminalsHeavy-duty die-cast zinc housing$9.61
- Hopkins Towing®6-Pole Round Car End Connector (48425)Universal 6-Pole Round Car End Connector (48425) by Hopkins Towing®. Material: Plastic. 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...Corrosion Resistant TerminalsWeatherproof rubber boot protects back of connector$11.46
- Hopkins Towing®6-Pole Round Connector Kit (48405)Universal 6-Pole Round Connector Kit (48405) 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,...Commonly used For Horse TrailersIncludes mounting bracket, wire, splices, and hardware$16.12
- Hopkins Towing®7 Blade Socket with LED Tester (48503)Universal 7 Blade Socket with LED Tester 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,...Quick/Easy troubleshootingLEDs verify wiring continuity$23.94
- Hopkins Towing®7 RV Blade Car End Connector (48495)Universal 7 RV Blade Car End Connector (48495) by Hopkins Towing®. Material: Metal. 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....Corrosion Resistant TerminalsAluminum housing$14.07
- Hopkins Towing®7 RV Blade Car End Connector (48485)Universal 7 RV Blade Car End Connector (48485) by Hopkins Towing®. Material: Plastic. 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...Impact and Corrosion ResistantRear grommet/ strain relief for weatherproofing$9.42
- Hopkins Towing®7 RV Blade Connector Set (48465)Universal 7 RV Blade 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,...Corrosion Resistant TerminalsPlastic trailer and vehicle ends$21.63
- Hopkins Towing®7 RV Blade Trailer End Connector (48515)Universal 7 RV Blade Trailer End Connector (48515) by Hopkins Towing®. Material: Metal. 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...Made with aluminum housingCorrosion resistant terminals$11.68
- Hopkins Towing®7 RV Blade Trailer End Connector (48505)Universal 7 RV Blade Trailer End Connector (48505) by Hopkins Towing®. Material: Plastic. 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...Impact and corrosion resistantEasy-pull grip design$7.96
- Hopkins Towing®7 RV Blade to 6 Round Adapter (47054)Universal 7 RV Blade to 6 Round Adapter (47054) by Hopkins Towing®. With Nite-Glow. 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...Nite-Glowtm illuminates on taillight function verifying continuityStretches to 8 feet$84.95
- Hopkins Towing®7-Pole Round Car End Connector (52016)Universal 7-Pole Round Car End Connector (52016) 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,...Impact and corrosion resistantHeavy-duty die-cast zinc design$18.91
- Hopkins Towing®7-Pole Round Trailer End Connector (52024)Universal 7-Pole Round Trailer End Connector (52024) by Hopkins Towing®. Without Cable Protector. 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,...Impact and corrosion resistantHeavy-duty die-cast zinc design$15.16
- Hopkins Towing®7-Pole Round Trailer End Connector with Cable Protector (52027)Universal 7-Pole Round Trailer End Connector with Cable Protector 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...Cable protector keeps wires from being damagedScrews into back of connector$18.88
- Hopkins Towing®8' 7 Blade Connector with Jacketed Cable (20246)Universal 8' 7 Blade Connector with Jacketed Cable (20246) by Hopkins Towing®. Without UPC Label. With Cardboard Wrap Package. To ensure a secure and reliable connection and consolidate all of the electrical towing functions of your...Heavy duty constructionWire is heavily insulated with jacketed wire sleeving$46.37
- Hopkins Towing®8' 7 Blade Molded Trailer Cable with UPC Label (20146)Universal 8' 7 Blade Molded Trailer Cable with UPC Label by Hopkins Towing®. With UPC Label. With Cardboard Wrap Package. To ensure a secure and reliable connection and consolidate all of the electrical towing functions of your trailer...Heavy duty constructionWire is heavily insulated with jacketed wire sleeving$44.23
- Hopkins Towing®8' 7 RV Molded Connector (20047)Universal 8' 7 RV Molded Connector (20047) by Hopkins Towing®. Without LED Test. Without UPC Label. To ensure a secure and reliable connection and consolidate all of the electrical towing functions of your trailer into a single plug, go...Heavy duty constructionWire is heavily insulated with jacketed wire sleeving$32.43
- Hopkins Towing®Endurance Flex-Coil Nite-Glow™ 4-Pole Round to 4-Pole Round Adapter (47045)Universal Endurance Flex-Coil Nite-Glow™ 4-Pole Round to 4-Pole Round Adapter (47045) by Hopkins Towing®. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer...Nite-Glow™ illuminates on taillight function verifying continuityStretches to 8 feet$52.82
- Hopkins Towing®Endurance Flex-Coil Nite-Glow™ 6-Pole Round to 6-Pole Round Adapter (47055)Universal Endurance Flex-Coil Nite-Glow™ 6-Pole Round to 6-Pole Round Adapter (47055) by Hopkins Towing®. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer...Nite-Glow™ illuminates on taillight function verifying continuityStretches to 8 feet$65.70
- Hopkins Towing®Endurance Flex-Coil Nite-Glow™ 7 RV Blade Adapter (47043)Universal Endurance Flex-Coil Nite-Glow™ 7 RV Blade Adapter (47043) by Hopkins Towing®. With Nite-Glow. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive trailer must...Nite-Glow™ illuminates on taillight function verifying continuityStretches to 8 feet$43.70
- Hopkins Towing®Endurance Flex-Coil Nite-Glow™ 7 RV Blade to 4-Wire Flat Adapter (47015)Universal Endurance Flex-Coil Nite-Glow™ 7 RV Blade to 4-Wire Flat Adapter (47015) by Hopkins Towing®. With Nite-Glow. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An...Nite-Glow™ illuminates on taillight function verifying continuityStretches to 8 feet$41.12
- Hopkins Towing®Endurance Quick-Fix™ 4-Wire Flat Trailer End Connector (48192)Universal Endurance Quick-Fix™ 4-Wire Flat Trailer End Connector (48192) 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...LED test lights confirm electrical continuityErgonomic grip for easier handling$7.43
- Hopkins Towing®Endurance™ 4-Wire Flat Y-Harness Connector (48240)Universal Endurance™ 4-Wire Flat Y-Harness Connector by Hopkins Towing®. Length: 2'. Ground wire length: 36". To have a greater peace of mind when driving with a trailer, go with this perfect accessory that is sure to provide you with...Wiring kit for Re-wiring or new installs on Lightweight trailersWishbone design allows for the taillight brown wires to extend to both taillights$25.49
- Hopkins Towing®Endurance™ 6-Pole Round Car End Connector (48420)Universal Endurance™ 6-Pole Round Car End Connector (48420) by Hopkins Towing®. Without Metal Socket. 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,...Maximum durability backed by Industry's Best: 3-Year WarrantyLong-life hinge opens 180 degrees$16.75
- Hopkins Towing®Endurance™ 7 RV Blade Car End Connector (48480)Universal Endurance™ 7 RV Blade Car End 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...Endurance Vehicle Side Socket- 3-Year WarrantyOversized hinge for Maximum Durability$21.10
- Hopkins Towing®Endurance™ 7 RV Blade Molded Car End Connector with Cable (20022)Universal Endurance™ 7 RV Blade Molded Car End Connector with Cable by Hopkins Towing®. To ensure a secure and reliable connection and consolidate all of the electrical towing functions of your trailer into a single plug, go with this...3 Foot CableReinforced lid opens 180 degrees to prevent breaking$46.94
- Hopkins Towing®Endurance™ 7 RV Blade Trailer End Connector (48510)Universal Endurance™ 7 RV Blade Trailer End Connector (48510) by Hopkins Towing®. Material: Metal. 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,...Ergonomic pistol grip for easier handlingUltimate weatherproofing protects connection$19.53
- Hopkins Towing®Endurance™ 7 RV Blade Trailer End Connector (48500)Universal Endurance™ 7 RV Blade Trailer End Connector (48500) by Hopkins Towing®. Material: Plastic. 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,...Endurance 3-Year WarrantyErgonomic pistol-grip for easier handling$13.79
- Hopkins Towing®Endurance™ 7-Round Pin to 4-Flat with Converter (47407)Universal Endurance™ 7-Round Pin to 4-Flat with Converter by Hopkins Towing®. 7 Round Pin to 4 Flat. 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,...Plug-In Simple! AdapterBuilt-in taillight converter for vehicles with independent brake and turn signals$33.20
- Hopkins Towing®Endurance™ Flex-Coil™ 7 RV Blade to 4-Wire Flat Adapter (47065)Universal Endurance™ Flex-Coil™ 7 RV Blade to 4-Wire Flat Adapter (47065) by Hopkins Towing®. Without Nite-Glow. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive...Keeps wires from dangling on the ground preventing damage and shortsStretches to 3 feet$38.92
- Hopkins Towing®Endurance™ Flex-Coil™ 7 RV Blade to 5-Wire Flat Adapter (47075)Universal Endurance™ Flex-Coil™ 7 RV Blade to 5-Wire Flat Adapter (47075) by Hopkins Towing®. Without Nite-Glow. When attaching a trailer to your vehicle, a premium quality wiring kit or harness is a vital necessity. An automotive...Nite-Glow™ illuminates on taillight function verifying continuityStretches to 8 feet$46.88
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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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