1999 Ford F-350, 450, and 550 Cab and Chassis Trailer Wiring

Name: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors
Brand: CURT
SKU: C55774
Price: 32.61 USD
Availability: InStock
Rating: 4.72358900144718 (691 reviews)

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Combined wiring system - brake and turn signals are sent along the same wire.

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors
with factory 7-Way

691 reviews

Code: C55774

$32.61

Retail:$57.99

You Save: 44%

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
Vehicle End Connector
No Converter
Factory Tow Package
Plug and Lead
4 Flat
7 Blade
Plug-In

Features:

Quickly and easily install a 7-way and a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package wiring harness - no cutting, splicing or tapping required.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

More Information >

Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty)
with factory 4-flat

417 reviews

Code: 118243

$66.23

Retail:$80.86

You Save: 18%

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
Vehicle End Connector
Visible
No Converter
Factory Tow Package
Plug and Lead
7 Blade
Plug-In

Plug-In Location:

Under vehicle, driver side

Installation Notes:

Product intended as a factory replacement harness or socket

More Information >

EZ Connector Magnetic 7-Way Trailer Connectors w/ Watertight Seal - Custom - Vehicle/Trailer End
with factory 7-Way

26 reviews

Code: 319-R7-02

$189.99

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
Trailer and Vehicle End Connector
No Converter
No Tow Package
Plug and Lead
7 Contact
Plug-In

Plug-In Location:

Under vehicle, driver side

Features:

Upgrade the 7-way connection on your vehicle and trailer with this complete kit. Built-in magnets create tight connection. O-rings make a watertight seal. Face-to-face contacts mean no bent or broken terminals. Includes plug holder and dummy plug.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

More Information >

EZ Connector Custom Vehicle Wiring Harness w/ Magnetic 7-Way Trailer Connector
with factory 7-Way

15 reviews

Code: 319-R7-06

$121.99

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
Vehicle End Connector
No Converter
No Tow Package
Plug and Lead
7 Contact
Plug-In

Plug-In Location:

Under vehicle, driver side

Features:

Replace the existing 7-way on your vehicle with this socket. Built-in magnet creates tight connection with EZ Connector trailer-end plug (sold separately). Face-to-face contacts mean no bent or broken terminals.

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

This wiring is intended to be used with the 319-R7-07 trailer side plug, which is sold separately.

If your trailer has conventional 7-way wiring, this wiring harness is made compatible with an EZConnect Adapter, which is sold separately.

More Information >

EZ Connector Custom Vehicle Wiring Harness w/ Magnetic 7-Way Trailer Connector - Watertight Seal
with factory 7-Way

25 reviews

Code: 319-S7-06

$84.99

In Stock

Custom Fit Vehicle Wiring Specs:

Trailer Hitch Wiring
Vehicle End Connector
No Converter
No Tow Package
Plug and Lead
7 Contact
Plug-In

Plug-In Location:

Under vehicle, driver side

Features:

Installation Notes:

For vehicles with factory tow package; may require additional components or may be used as a replacement harness

This wiring is intended to be used with the 319-S7-07 trailer side plug, which is sold separately.

If your trailer has conventional 7-way wiring, this wiring harness is made compatible with an EZConnect Adapter, which is sold separately.

More Information >

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What is the Difference Between a Class II and a Class III Hitch?

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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What is the Difference Between a 4-Way and 7-Way Trailer Connector

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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What Is An OEM Prep Package And How Do I Know If I Have It

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Difference Between Curt and etrailer Trailer Hitch Receivers for 2020 Chevy Colorado

There is only one difference between the Curt Trailer Hitch Receiver #C13176 and etrailer Trailer Hitch Receiver #e98909 that fit your 2020 Chevrolet Colorado, which is the finish. The Curt trailer hitch has a glossy black finish while the etrailer…

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Does etrailer Trailer Hitch Receiver for 2018 Dodge Journey Include Fishwire

Hey Curtis! Yes, the etrailer Trailer Hitch Receiver #e98845 comes with the fishwire/bolt leader. All of the hardware pictured below, including the fishwire, will come with the trailer hitch. This is confirmed to fit your 2018 Dodge Journey. Do you…

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Hi Jerry, For your 2025 Kia Sorento PHEV you would need the Curt Trailer Hitch Receiver #C37RV for the trailer hitch. The right light kit for your Sorento is going to depend on a few factors. For models with the tow package, like you stated you have,…

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Hey Tim, The ZCI Circuit Protected Vehicle Wiring Harness #119250KIT is compatible with LED lights and has been used as a go to for years for people who have LED trailer lights. The light function is supposed send a tiny bit of voltage from the…

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My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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4 Pin Wiring Harness for 2025 Chevrolet Equinox

Hello Andrew. It looks like our installers have not had the privilege of doing an install on a 2025 Chevy Equinox. I see that the wiring harnesses that we do have in stock have the 6 pin connector. It looks like Curt is aware of this issue and is in…

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Does Truck with 6-1/2 ft bed Have to Use Slider Hitch for Turning Clearance with Fifth Wheel Hitch

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Difference Between Curt & etrailer Trailer Hitches For 2024 Subaru Crosstrek Wilderness

Yep, so long as your 2024 Subaru Crosstrek Wilderness is not a hybrid both the Curt and etrailer hitches will fit: - Curt Trailer Hitch Receiver #C13382 - etrailer Trailer Hitch Receiver #e98912 The only difference besides price is the finish; the…

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Comparing the Curt Hitch C13416 and EcoHitch Hitch 306-X7396 for a 2019 Toyota RAV4

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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