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Factory (OEM) tow package required for installation
4-wire to 7-wire upgrade kit
Warranty: One-Year Limited Warranty
Electrical System Type: 2W
Output Type: 7-Way Flat
Installation Difficulty: Novice
Installation Time Exact (Minutes): 5
CURT custom wiring connectors and harnesses are the easiest way to outfit your vehicle with a trailer wiring connection for towing. Each one is custom-fitted to work with a specific make and model. This particular 7-way RV blade socket is designed to be a custom wiring option for certain years of the Ford F250 Super Duty, F350 Super Duty, F450 Super Duty and F550 Super Duty (see application info to verify fitment). It provides a universal trailer connection for the tail lights, brake lights, reverse lights, turn signals, electronic trailer brakes and auxiliary power. 7prong taillight wiring can be used as a replacement or new wiring and is typically used for towing fifth wheel and gooseneck trailers. This 7 way female outlet comes with all necessary hardware to establish a solid connection, as well as a dust cover to keep the connector socket clean when not in use. All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Although this factory tow package 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. Instead of cutting, splicing and soldering into your vehicle's wiring system, the custom wiring connector uses a single OEM compatible plug and instantly provides a standard vehicle-to-trailer hitch wiring connection. To ensure long-lasting reliability, all CURT custom tconnector wiring is thoroughly tested for optimal functionality.

CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-9494Rediscover "Us" Time | Tested. Proven. Safe. Towing Products
4 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 1999 - 2001 | Ford F-250 Super Duty | Installation Time: 30-60 minutes |
| 1999 - 2001 | Ford F-350 Super Duty | Installation Time: 30-60 minutes |
| 1999 - 2001 | Ford F-450 Super Duty | Installation Time: 30-60 minutes |
| 1999 - 2001 | Ford F-550 Super Duty | Installation Time: 30-60 minutes |
The CURT Custom 7-Way RV Blade, Select Ford F250, F350, F450, F550, Tow Package Required Trailer Connector Kit (Part #BKDK55243) fits 1999-2001 Ford F-250 Super Duty models. The 2001 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the CURT Custom 7-Way RV Blade, Select Ford F250, F350, F450, F550, Tow Package Required Trailer Connector Kit (Part #BKDK55243) is designed to fit the 1999-2001 Ford F-250 Super Duty.
The CURT Custom 7-Way RV Blade, Select Ford F250, F350, F450, F550, Tow Package Required Trailer Connector Kit (Part #BKDK55243) fits the following vehicles: 1999-2001 Ford F-250 Super Duty; 1999-2001 Ford F-350 Super Duty; 1999-2001 Ford F-450 Super Duty; 1999-2001 Ford F-550 Super Duty. Always verify your specific year, make, and model before ordering.
The CURT Custom 7-Way RV Blade, Select Ford F250, F350, F450, F550, Tow Package Required Trailer Connector Kit (Part #BKDK55243) Typical installation time is 30-60 minutes. Basic hand tools are typically all you need.
Yes, Curt part number 55243 is designed for Ford F-250 & F-350 Super Duty vehicles. It is also compatible with Ford F-450 & F-550 Heritage models.
Yes, Curt part number 55243 is compatible with Ford F-450 & F-550 Heritage vehicles.
The 55243 includes a trailer tow harness with a 7-way socket, two 30 amp maxi-fuses for the TRAILER TOW ELECTRIC BRAKE and TRAILER TOW BATTERY CHARGE circuits, and two relays for the TRAILER TOW BACKUP LAMP RELAY and TRAILER TOW BATTERY CHARGE RELAY locations. A bracket or electrical box to mount the 7-way socket is not included.
Yes. The 7-way socket must be mounted in an accessible location using a bracket or electrical box, which is not included with the 55243. You will need to source this separately.
Yes. You must disconnect the vehicle's negative battery cable before accessing the power distribution box and installing the fuses and relays. Reconnect the battery cable after all electrical connections are complete.
The vehicle's wiring harness plugs are located in the rear, underneath the vehicle, inside the driver's side frame rail.
Remove the protective cap and install the trailer tow harness into the mating plug. The plug should match the trailer wiring harness end.
Mount the 7-way socket in an accessible location using a bracket or electrical box (not included). Secure any loose wires after installation.
Consult your vehicle's owner's manual to locate the specific fuse and relay positions. The manual will show you where to insert the TRAILER TOW ELECTRIC BRAKE fuse, TRAILER TOW BATTERY CHARGE fuse, TRAILER TOW BACKUP LAMP RELAY, and TRAILER TOW BATTERY CHARGE RELAY in the power distribution box.
The 55243 includes two 30 amp maxi-fuses. These are inserted into the TRAILER TOW ELECTRIC BRAKE and TRAILER TOW BATTERY CHARGE fuse locations in the power distribution box.
The power distribution box is located on the driver's side in the engine compartment, and the trailer tow relay block is attached to it.
Before drilling, verify that miscellaneous items that may be hidden behind or under any surface are not present. This will avoid damage to hidden components and prevent personal injury.
Test the installation with a test light or trailer. This verifies that the electrical connections are functioning correctly.
Yes, the 55243 is designed for Ford F-250 & F-350 Super Duty and Ford F-450 & F-550 Heritage models.
A bracket or electrical box to mount the 7-way socket is not included and must be purchased separately.
Yes, disconnect the vehicle's negative battery cable before accessing the power distribution box. Reconnect it after installing the fuses and relays.
The 55243 includes two 30 amp maxi-fuses for the TRAILER TOW ELECTRIC BRAKE and TRAILER TOW BATTERY CHARGE circuits.
Verify that miscellaneous items hidden behind or under any surface are not present before drilling to avoid damage and personal injury.
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