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Truck Parts > Trailer Parts > Trailer Wiring and Electrical
Trailer Wiring and Electrical
Trailer Wiring Adapters

Trailer Wiring Adapters

Need to convert a 7-way trailer connector to a 4-flat or a 4-Way Flat to a 5-Way Flat connector, we have what you need. Our trailer wiring and electrical adapters allow for convenient connection to multiple trailers.
Trailer Connectors, Trailer Plug Wiring

Trailer Connectors, Trailer Plug Wiring

Get your trailer ready for the road with trailer connectors and wiring harnesses from TruckSpring.com. We offer components for both Trailer-end and Car-end connections, that meet SAE specification J1128 assuring consistent quality and reliability.
Mounting Brackets

Mounting Brackets

Do you have a trailer connector hanging that needs to be mounted correctly. We stock mounting brackets for 4, 5, 6, and 7 way trailer connectors. Trailer electrical mounting brackets allow for quick installation of electrical wiring plugs.
Power Converters

Power Converters

A trailer light power module eliminates additional electrical draw on the vehicles taillight circuits which ensures you have maximum trailer light brightness and protects you from overloading the system.
Tail Light Converters

Tail Light Converters

Taillight Converters adapt import and domestic vehicles with separate turn and stop lights (3 wire system) to standard trailer taillight wiring (2 wire systems).
T-Connectors

T-Connectors

Need to install trailer wiring on your car, truck SUV or van? Tow Ready T-One Connectors eliminate the need to cut or splice wires when installing trailer lights. Simple do-it-yourself installation of trailer wiring.
Testers and Test Equipment

Testers and Test Equipment

Are you having a problem with your trailer lights and unable to find the problem? Use an inexpensive electrical tester and save time and money. Perfect for testing brake lights and turn signals, or easily locate short circuits in trailer wiring.
Wiring Components

Wiring Components

Need to replace or install new wiring for your trailer or vehicle? Bulk wire, wire conduit and junction boxes can make the job easier and protect your trailer wiring from the elements.
Trailer Wiring Information

Trailer Wiring Information

Not sure which wires attach to what on your trailer connectors? Does one of your turn signals not work and you’re not sure which wire to inspect? Check out or trailer wiring diagrams for a quick reference on trailer wiring.
Trailer Wiring and Electrical

If you're going to tow a trailer, you will need your trailer lights running before you go. We stock and complete line of trailer connectors and adapters for quick, professional trailer repairs.

Need to tow a trailer and your car, truck or SUV doesn't have trailer wiring? Today T-Connectors take the guess work out of trailer wiring. No need to splice, tape or cut wires. T-Connectors are vehicle specific and install quick and easy. Simply locate your wiring harness connector, unplug the connection and insert the T-Connector into the vehicle harness.

Browse our selection of electrical towing parts below or feel free to contact us at 1-800-358-4751 for assistance.

Welcome to Michigan Truck Spring & TruckSpring.com

Since 1926, Michigan Truck Spring has been installing and using the same high quality truck parts that you'll find on our website. In fact, we install everything we sell, and have been selling online as TruckSpring.com since 2001.

Whether you're looking to overhaul your truck suspension, or make a minor repair, our mission is simple - to make sure you have the quality parts you need, and to become your trusted source for truck parts.

Located in the heart of the Midwest, Michigan Truck Spring employees are trained technicians in truck parts and repair. We're here to help, whether it's selecting the right product for your vehicle, an installation question, or a maintenance question, we'll help you through your project. We work hard to make sure you get the right parts for the job. You won't find a company more passionate about truck parts than Michigan Truck Spring.