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Wow! etrailer saved me quite a bit of money over other sources. Everything arrived VERY QUICKLY and complete. The only problem I had with the install of the hitch was finding the tools I needed (the garage is a mess and nothing ever gets put up). thanks for everything Shawn
Shawn, Ramsey, IL
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Electrical Supplies for Towing Trailers

We offer a complete selection of electrical components for towing trailers such as wiring harnesses, brake controllers, connectors, and adapters.

We have also put together some in depth information about wiring your vehicle to tow a trailermore information, including descriptions of all the different types of wiring harnesses, adapters, diagrams of how to wire a trailer, and wiring diagrams for different types of plugs.


Vehicle wiring adapters

Wiring Adapters

Do you have mismatches plugs on your truck and trailer? Finding the correct wiring adapter has never been easier than using our Wiring Adapter Fitguide. Simply select the type of plug on your vehicle and the type of plug on the trailer you need to tow and the available wiring adapters will be listed. You can also browse through our vehicle wiring adapter category.

  • Adapters for every type of vehicle wiring plug, to convert to any type of trailer wiring plug
  • Great for use with multiple trailers



T-one vehicle wiring harness

Vehicle Wiring Harness

Custom fit vehicle wiring kits, commonly called T-ones are available for most cars and trucks. Using the Hitch Hunter™ you can quickly locate the custom fit trailer hitch for your vehicle. Along with the hitches we have listed the custom fit wiring harnesses you will need to tow a trailer or connect auxillary electrical items such as extra lights. If a custom fit wiring harness is not available for your car or truck we will list the hardwire options which are available for your vehicle.

  • Custom fit wiring harnesses are available for most vehicles
  • Quick and easy, plug in installations, no cutting or splicing needed
  • Solid one piece construction
  • Clean, factory installed appearance



Trailer wiring connectors

Trailer Connectors

4-flat, 4-round, 5-flat, 5-round, 6-way, 7-way, you get the idea. We have all the wiring and connectors you may need to hook up a utility trailer. These connectors will make attaching your trailer to the towing vehicle quick and easy. We offer a wide variety of connectors to suit anyone's towing needs.

  • Variety of connection styles available
  • Easy installations



Vehicle wiring mounting brackets

Mounting Brackets

Keep your wires from dangling below you car or truck and getting damaged. With a mounting bracket your wires and connectors will be secured and there will be a solid location to plug in your trailer wiring.

  • Mounting brackets available to fit all types of plugs
  • Prevents damage to plugs and wires
  • Provides secured location for making wiring connections
  • Solid connections with drill, no drill, or magnetic attachments
  • Easy installation



Electric Brake Controllers

Brake Controller

Brake Controls are designed to apply the brakes on the towed trailer. There are three different types of trailer brake controls available; timed, inertia, and proportional. There are also Breakaway kits available which apply the trailer brakes if the trailer becomes disconnected from the tow vehicle hitch while in motion.

  • Timed Brake Controller - Timed based controls generate an output signal that increases over a period of time. The time based controls apply braking power at a fixed rate that is not proportional to the pressure applied to the brake pedal.
  • Inertia / Proportional Brake Controller - Inertia and Proportional based controls offer a smooth braking response to almost any stop. Through the use of a sensing device, the brake control can apply varying levels of braking power to match the tow vehicle. In other words, Proportional controls deliver power to the trailer brakes in direct relationship to the actual physical deceleration of the tow vehicle.
  • Breakaway Kit - A breakaway kit is designed to apply the trailer electric brakes in the event that the trailer becomes disconnected from the hitch while in motion. This kit is required in many States and Provinces.



Power Inverters

Power Inverters

Get the power you need, when you need it. With a power inverter you can convert the DC power from your vehicle to the AC power you need to charge your electronics, run small appliances, or power your tools. We offer power inverters that plug right into your cigarette lighter or utility power ports, or models that hardwire into your vehicles electrical system to provide clean, heavy duty power for your computers or power tools. We all know the feeling of being stuck with a dead battery when you really need to make a call or look something up on your computer, make sure it never happens to you again by adding a power inverter to your vehicle.

  • Provide AC power whenever you need it.
  • Charge and power your electronics, tools, or small appliances
  • Safety features to ensure trouble free operation



Dielectric Grease

Dielectric Grease

Help to extend the life of your electric components with a bit of dielectric grease. This electrical grease helps to prevent corrosion and seal connections by shedding moisture away from sensitive electrical trailer parts.





Warning Lights

Warning Lights

If you need to carry an oversized load, or be prepared for that inevitable emergency situation that will arise while towing, these lights can help you and your cargo arrive safe. We carry emergency lights, triangles, warning lights for use while towing, search lights, and flashlights.

  • Warning lights for towing
  • Emergency lights and flashlights
  • Search lights

Electrical