2003 Freightliner Sprinter 2500 Trailer Wiring

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Keep Your 2003 Freightliner Sprinter 2500 in Top Shape with a Quality Trailer Wiring

When it comes to maintaining or upgrading your 2003 Freightliner Sprinter 2500, choosing high-quality parts is crucial for ensuring your vehicle stays in top shape, whether you’re tackling a repair or enhancing performance. At Advance Auto Parts, we know how important it is to find the right Trailer Wiring for your Sprinter 2500. We currently carry a top Trailer Wiring in stock that is built to last. Whether you’re replacing a damaged Trailer Wiring or looking to upgrade, our selection for the 2003 Freightliner Sprinter 2500 ensures you’ll find exactly what you need to keep your vehicle looking and performing its best.

A Reliable Trailer Wiring from a Trusted Brand

When it comes to trusted Trailer Wiring brands, we’ve got you covered. Our inventory features a Trailer Wiring from CURT, a brand you can count on. This Trailer Wiring starts at just $45.99 and has a rating of 5 stars from over 40 customer reviews. After you purchase your 2003 Freightliner Sprinter 2500 Trailer Wiring you can scroll below to see options other Freightliner Sprinter 2500 owners are loving. Even with only one Trailer Wiring in stock, you can be confident you’re getting the best option available and designed to fit your Sprinter 2500 perfectly, offering both functionality and style.

Explore Related Parts

And while you’re here, don’t forget to check out related part categories like Trailer Hitches to complete your upgrade or repair project. At Advance Auto Parts, we’re proud to offer the parts and expertise to keep your 2003 Freightliner Sprinter 2500 running smoothly and looking great.

Essential 2003 Freightliner Sprinter 2500 Trailer Wiring

CURT – Replacement OE 7-Way RV Blade Socket (Plugs into USCAR) (Part No.55415)

Replacement OE 7-Way RV Blade Socket (Plugs into USCAR)

from

$22.99
Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer’s electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This 7-way RV blade connector is designed to plug into a USCAR socket and supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery, reverse lights and brake lights, as well as a ground connection. It is intended to be a replacement trailer connector, plugging into a standard USCAR socket (see application info to verify fitment with your vehicle). It features rust-free black plastic construction and comes with a spring-loaded cover to keep out dust and water. This 7-way RV blade connector is a female-end socket, specifically designed for the vehicle side of the connection.

Product Features:
  • Plugs into USCAR socket to provide 7-way RV blade trailer wiring connector
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Spring-loaded dust cover keeps connector clean when not in use
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CURT – Replacement OE 4-Way Flat Socket (Plugs into USCAR) (Part No.55515)

Replacement OE 4-Way Flat Socket (Plugs into USCAR)

from

$32.99
A CURT custom wiring connector (sometimes called a T-connector) is a simple, plug-and-play electrical device that eliminates the need for cutting, splicing and soldering when installing vehicle-to-trailer wiring. Most vehicles do not come ready to tow. Unless your vehicle has a towing package, it is probably not equipped with a trailer wiring connector. This is where CURT’s custom wiring connectors come into play. A custom wiring connector uses a single original equipment plug to plug into a special socket provided by your vehicle. Though this option is not available on every vehicle, some automotive manufacturers design their vehicles to be easily equipped for towing by supplying a socket, integrated into the vehicle’s electrical system, to readily accept a custom wiring connector. With a CURT custom wiring connector, there is no need to tap into the taillight assembly because a special socket is already provided. This custom wiring connector provides a 4-way flat connector socket and is designed to be a custom wiring option for a variety of vehicles (see application info to verify fitment with your vehicle). CURT custom wiring connectors are designed to be long-lasting and simple to install. They come with dust covers to keep your connector clean when not in use.

Product Features:
  • Plugs into USCAR socket to provide 4-way flat trailer wiring connector
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Dust cover included to keep connector clean when not in use
  • Slit loom keeps wires contained and well protected
  • Backed by a limited one-year warranty
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CURT – Replacement USCAR Socket with 24in. Wires (Vehicle Side) (Part No.56229)

Replacement USCAR Socket with 24in. Wires (Vehicle Side)

from

$26.99
Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer’s electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This 7-way USCAR replacement harness is designed to replace an existing USCAR plug and supply power for tail lights, turn signals, electric trailer brakes, a battery, reverse lights and brake lights, as well as a ground connection. It features rust-free black plastic construction and comes with color-coded wires and 24″ of bonded wire for easy splicing into your vehicle’s wiring system. This 7-way USCAR connector is a female-end socket, specifically designed for the vehicle side of the connection.

Product Features:
  • Replaces damaged or missing USCAR vehicle harness
  • Includes 24″ color-coded, bonded wires for easy installation
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CURT – Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required) (Part No.55381)

Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required)

from

$45.99
If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness — also called a T-connector — is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Chrysler Aspen and Pacifica, Dodge Dakota, Durango, Dodge Ram 2500, 1500 Van, 2500 Van, Dodge Sprinter 2500 and 3500, Jeep Commander, Grand Cherokee and Liberty and Mitsubishi Raider (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination — maybe it’s the boat landing at your favorite fishing spot, maybe it’s a campsite that overlooks one of nature’s masterpieces, or maybe it’s the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.

Product Features:
  • Plugs into vehicle tail light assembly to provide a 4-way flat socket
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Dust cover included to keep connector clean when not in use
See More

CURT – Replacement OE 7-Way RV Blade Socket (Twists into USCAR) (Part No.56415)

Replacement OE 7-Way RV Blade Socket (Twists into USCAR)

from

$25.99
Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer’s electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. This 7-way OEM USCAR replacement connector is designed to plug into a twist-in OEM vehicle socket and supply power for tail lights, turn signals, electric trailer brakes, a 12-volt battery, reverse lights and brake lights, as well as a ground connection. It features rust-free black plastic construction and comes with a spring-loaded cover to keep out dust and water. This 7-way RV blade connector is a female-end socket, specifically designed for the vehicle side of the connection (see application info to verify fitment with your vehicle).

Product Features:
  • Plugs into USCAR socket to provide 7-way RV blade trailer wiring connector
  • Twist-in, plug-and-play design eliminates the need for cutting or splicing
  • 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
  • Spring-loaded dust cover keeps connector clean when not in use
See More

CURT – Multi-Function Taillight Converter (Part No.56236)

Multi-Function Taillight Converter

from

$104.99
Rain, road grime and salt can deal a vicious blow to your trailer wiring, and it takes electrical components with an extra-thick shell to stand up to the elements. The CURT multi-function electrical converter is an advanced taillight converter that offers the ultimate in vehicle compatibility and weather resistance, giving you a reliable wiring connection any season of the year. The potted design seals the internal electrical components in a watertight enclosure and is filled with a solid compound to protect against impacts, vibrations and moisture for long-lasting use, even on the exterior of the vehicle. The converter also features our advanced surface mount technology (SMT), using smaller components mounted directly to the surface of the circuit board. This produces lower resistance, reduced heat generation, longer life cycles and higher reliability. The CURT multi-function electrical converter comes with pigtail wires that are able to be spliced into two-wire, three-wire or PWM wiring system with combined stop and taillights. It converts any of these systems to a simple two-wire system, using a standard 4-way flat output, to be compatible with most trailer wiring. The converter is controlled using a microcontroller that is able to sense the current passing through it, allowing for quick reaction to dangerous conditions such as overload and short circuits. It also filters unwanted input signals to protect your wiring systems and uses a mere seven volts for low-voltage operation. The CURT multi-function taillight converter is a heavy-duty electrical converter for virtually any vehicle-trailer combination. It comes with color-coded wires and an easy-to-read wiring guide, as well as a dust cover to protect the 4-way flat connector. This package also includes four snap locks for faster, more secure splicing. A powered converter wiring kit #55152 is also required for installation.

Product Features:
  • Converts 2-wire, 3-wire or PWM ST system to 2-wire trailer light wiring
  • Potted enclosure significantly increases water and vibration resistance
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Constructed with SMT circuitry for better performance and durability
  • Microcontroller senses current to rapidly react to overload
  • Provides improved overload, short-circuit and thermal protection
  • Low-voltage operation allows function down to seven volts
  • Color-coded wires with wiring guide for easier installation
  • Snap locks included for fast, secure splicing
  • Dust cover included to keep connector clean when not in use
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CURT – Replacement OE 4-Way Flat Socket (T s into USCAR) (Part No.55384)

Replacement OE 4-Way Flat Socket (T s into USCAR)

from

$38.99
Stress is the last thing you should feel when towing a trailer — whether you’re hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot. At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it. CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection. They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Though this special socket is not equipped on every vehicle, a CURT custom wiring connector (also called a T-connector) utilizes the socket for simple, stress-free installation. Rather than requiring you to cut, splice and solder into your vehicle’s wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard vehicle-to-trailer wiring connection, typically in the form a 4-way flat. All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular connector provides a 4-way flat socket while retaining use of the existing OEM socket. It is designed to be a custom wiring option for a variety of vehicles (see application info to verify fitment with your vehicle). It comes with a dust cover to keep the connector socket clean when not in use.

Product Features:
  • Plugs into USCAR connection to add 4-way flat and retain use of existing socket
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Dust cover included to keep connector clean when not in use
  • Slit loom keeps wires contained and well protected
See More

Most Popular Trailer Wiring Kit for 2003 Freightliner Sprinter 2500s

Enhance your 2003 Freightliner Sprinter 2500 with this popular Trailer Wiring Kit we have in stock, for $45.99.

CURT – Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required) (Part No.55381)

Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required)

from

$45.99
If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness — also called a T-connector — is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Chrysler Aspen and Pacifica, Dodge Dakota, Durango, Dodge Ram 2500, 1500 Van, 2500 Van, Dodge Sprinter 2500 and 3500, Jeep Commander, Grand Cherokee and Liberty and Mitsubishi Raider (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination — maybe it’s the boat landing at your favorite fishing spot, maybe it’s a campsite that overlooks one of nature’s masterpieces, or maybe it’s the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.

Product Features:
  • Plugs into vehicle tail light assembly to provide a 4-way flat socket
  • Simple plug-and-play design eliminates the need for cutting or splicing
  • 4-way flat output connects tail lights, brake lights and turn signals
  • Dust cover included to keep connector clean when not in use
See More

Top-Rated Trailer Wiring Brands For Your 2003 Freightliner Sprinter 2500

When it comes to finding the perfect Trailer Wiring for your 2003 Freightliner Sprinter 2500, Advance Auto Parts has you covered with our Trailer Wiring from CURT. This popular brand is known for its exceptional customer ratings and competitive prices, under $45.99. Purchasing a Trailer Wiring from us here at Advance Auto Parts is a smart move for both you and your 2003 Freightliner Sprinter 2500, providing peace of mind with parts that meet or exceed OEM standards.

A Reliable CURT Trailer Wiring For Your 2003 Freightliner Sprinter 2500

If you’re looking for a top-quality Trailer Wiring for your 2003 Freightliner Sprinter 2500, Advance Auto Parts has exactly what you need with our CURT Trailer Wirings. This Trailer Wiring has both durability and a precision fit. Coming in at only $45.99, this is the perfect Trailer Wiring for your needs and budget. CURT Trailer Wiring for the 2003 Freightliner Sprinter 2500 come highly rated, with over 20 customer reviews. Choosing a CURT Trailer Wiring from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required)
from $45.99
(20)
Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required)
“I admit they are bit pricey but it is well worth it in the end. Took me about 2 hours to remove and install the rear. And about 1 1/2 hours to do the ”

FAQs for 2003 Freightliner Sprinter 2500 Trailer Wirings

What’s the price range for 2003 Freightliner Sprinter 2500 Trailer Wiring?

We currently have just one Trailer Wiring for the 2003 Freightliner Sprinter 2500 in stock: Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required) and it costs $45.99.

Does Advance Auto Parts sell Trailer Wiring for other Freightliner Sprinter 2500 model years?

Yes, we carry Trailer Wiring for 17 model years of Freightliner Sprinter 2500s between 2004 and 2021. The following model years are the most popular for Trailer Wiring purchases: 2021, 2020, 2009, 2008, 2007, 2006, 2005, 2004, and 2011.

What are the top-rated Trailer Wiring that fit the 2003 Freightliner Sprinter 2500?

The one 2003 Freightliner Sprinter 2500 Trailer Wiring we have in stock is the Custom Wiring Harness (4-Way Flat Output; OEM Tow Package Required). It is rated 4.5 stars and costs $45.99.

What types of Trailer Wiring do you sell for my 2003 Freightliner Sprinter 2500?

We currently have just 1 Trailer Wiring in stock for a 2003 Freightliner Sprinter 2500, and as of 3/1/26, it is a Trailer Wiring Kit.

Can I get help with 2003 Freightliner Sprinter 2500 Trailer Wiring orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Freightliner Trailer Wiring and more.

What is your return policy for Freightliner Sprinter 2500 Trailer Wiring?

Advance Auto Parts keeps returns simple. For new Freightliner Sprinter 2500 Trailer Wiring and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.