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Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
Part Number: 56073
In Stock
$16.21
Retail:$24.95
You Save: 35%
2020 Ferrari GTC4Lusso
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- All Info
- Reviews (24)
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CURT Custom Fit Vehicle Wiring - 56073
Highlights
- Custom Fit for Your Vehicle: Works with your vehicle's wiring
- Tow-Ready Lighting: 4-Pole flat connector powers trailer stop, turn, and tail lights for safe towing.
- Plug-and-Play Install: T-connector plugs into factory tow package wiring under the rear of the vehicle.
- Factory Integration: Works with existing tow package relays and fuses for proper light operation.
- Clean Setup: Uses vehicle’s built-in connector so no cutting or splicing is required.
- Reliable Connection: Secure factory-style plugs ensure consistent trailer light performance.
Features to know about
Installs Fast with Factory Tow Package Plug: No Cutting or Splicing
Wiring a trailer doesn’t have to mean tearing into your vehicle’s electrical system. The Curt T-Connector plugs right into the factory tow package connection under the rear center of the vehicle. There’s no splicing or modifying wires—just connect the plug and you’ve got a working 4-flat trailer connector ready for towing lights.
Keeps Lighting Functions Working Normally: 4-Flat Connection for Stop, Turn, and Tail Lights
This harness powers the trailer’s running lights, turn signals, and brake lights through the standard 4-flat connector. It’s designed so the vehicle’s own lights continue to operate normally whether or not a trailer is connected, letting you tow with confidence that everything works as it should.
Simple Setup with Factory Fuse and Relay Positions: Ready for Clean Integration
When wiring through the factory tow package, setup is straightforward. The Curt 56073 uses existing fuse and relay slots—three relays in positions 29, 30, and 31, plus two 20-amp mini fuses in positions 46 and 52—to activate the tow circuit. That keeps everything neat and integrated within the factory system.
Built for Reliable Connections: Curt 4-Pole Flat Design
The 4-pole flat connector is a tried-and-true standard for small and mid-size trailers. Curt’s factory-fit plug delivers a secure, weather-resistant connection that’s easy to plug into any trailer using the same style. Once it’s in place, you’re ready to hit the road with lighting that works every time.
Specs
Electrical Specifications
- Connector Type: 4-Pole Flat Trailer Connector
- Compatibility: Factory Tow Package Vehicles Only
- Converter: No Converter
- Connection Type: Plug-In, Plug and Lead
- Connection Location: Under the vehicle’s rear at the center
Vehicle Compatibility
- 2004 Mercury Monterey: Fits models with factory tow package
- 2007 Ford Freestar: Fits models with factory tow package
Installation Requirements
- For 2007 Ford Freestar: Requires three relays and two 20 amp mini fuses
- Relay Locations: Positions 29, 30, and 31
- Fuse Locations: Positions 46 and 52
Note
- If the vehicle does not have the factory tow package, use TowReady harness # C56673, which includes the necessary relays to activate the plug.
- With either harness installed, the vehicle’s tail lights will operate normally whether or not a trailer is connected.
56073 CURT T-Connector - OE Replacement 4-Flat
This Product Fits The Following Vehicles
- 2004 - 2007 Ford Freestar with factory Tow Package
- 2004 - 2007 Mercury Monterey with factory Tow Package
Ratings & Reviews
4.9
24 reviews
by:
K Smith
02/28/2017
I like that the harness plugged into existing vehicle wiring harness. It took 5 minutes at most to install. [Retailer] wanted around $65 To install!!! I didn't take pics, it's easily imagined!!
by:
Sean
10/19/2023
it was easy to install it came with all the parts needed and it had pull thought tool for the hidden bolts and the wiring harness came with connector grease
by:
Chris W.
07/30/2014
2004
Ford
Freestar
Just what I was looking for. Bought a 2004 Freestar that had a hitch, but no connector for brakes. Found the OEM connection underneath but couldn't find anything at the auto stores to convert it to 4 Flat, looked everywhere. Thanks etrailer!
by:
Richard F
04/13/2016
2004
Ford
Freestar
I had a great experience with etrailer. This is not the first product I ordered from them and it won't be the last. Quality product for a great price.
by:
John
01/07/2019
Service was great. Product works perfectly. It even came one day earlier. Couldn't be happier. Will definitely use ETrailer again.
by:
Ken B.
02/06/2017
2006
Ford
Freestar
Exactly what I needed. Came with great instructions. Thanks, I will use you again.
by:
Scott
06/15/2015
2004
Ford
Freestar
Great Service Fast Shipping Great Price. Would order again for sure
by:
Dick
10/19/2016
2004
Ford
Freestar
Product worked as advertised. Video showed me exactly what to do and how to do it. The price, the service - outstanding.
by:
Michael
11/27/2018
I have not installed the items yet... will be using it next year...
by:
Ali G
06/30/2015
Product arrived in a timely matter and in great condition! Ordering was quick and easy.
by:
Chris
10/27/2018
Exactly what I ordered, was exactly what I ordered and came in good time
by:
Greg C.
10/27/2014
2004
Ford
Freestar
You guys make it easy to do these projects with your very informative videos to check out before you order. It made selecting the right part simple. So you get it right the first time. Thanks...
by:
Chien Pham
07/30/2019
Still in place, would buy again from them
by:
Kevin
03/12/2017
Very satisfied.
by:
Billy G.
04/10/2014
Item arrived on time and undamaged. Thanks for the prompt service.
by:
Michael H.
03/28/2014
Very pleased with the service, price and product. M.H.
by:
mark
10/18/2014
Exactly the product I needed and it arrived on time.
by:
Chaz
07/22/2020
Good product was delivered on time. Would order from this company again.
by:
Jennifer
11/05/2020
Glad I finally found the right part!
by:
Ronald
06/25/2020
2006
Mercury
Monterey
Nice Thanks
by:
Craig
08/12/2026
by:
Richard
09/24/2022
by:
Giuseppe
09/25/2022
by:
Dave Mc
09/17/2012
2005
Mercury
Monterey
24
24
true
See what our Experts say about this CURT Custom Fit Vehicle Wiring
- Will The Draw-Tite Trailer Hitch # 36318 Fit All Years of Ford FreestarThe item you selected, Draw-Tite Trailer Hitch, part # 36318 will fit all model years of the Ford Freestar which range from 2004-2007. This hitch will also fit the 2004-2007 Mercury Monterey. To complete your towing setup, you will need the following items: Draw-Tite Ball Mount, part # 36071 1-7/8 Inch Hitch Ball, part # 19256 2 Inch Hitch Ball, part # 19258 Pin and Clip, part # PC2 For wiring, if your Freestar came equipped with a factory tow package, you will need Curt Custom Fit Vehicle...
view full answer... - Which Relays and Fuses Are Required for Installation of Curt 56073 on 2007 Ford FreestarInstallation of the Curt # 56073 on your 2007 Ford Freestar requires three relays and two 20 amp mini fuses. Carefully remove the fuse panel cover and insert the relays into 29, 30, and 31. Insert the fuses into positions 46 and 52. See the diagram from the instructions below.
view full answer...
- Do Tail Lights Operate Normally After Installing Curt T-Connector # 56073 in 2004 Mercury MontereyThe part you referenced, Curt T-Connector # 56073 for the 2004 Mercury Monterey, is a correct fit for vehicles that came equipped with the factory tow package. It plugs in under the vehicle's rear at the center. If your Monterey does not have the factory tow package you will instead use TowReady harness # C56673 which comes with the needed relays to get everything working. With either of these trailer harnesses installed your Monterey's tail lights will behave normally whether or not...
view full answer... - No Power to Curt T-Connector Harness # 56073 Installed on 2005 Ford FreestarThe Curt T-Connector Vehicle Wiring Harness # 56073 referenced in your question is confirmed to fit your 2005 Ford Freestar only if it has the factory tow package. If you aren't getting any power at all to the connector then it's very possible that your vehicle is not equipped with the needed tow package wiring to power the factory connector behind the rear bumper so you'd need to go with # C56673 instead. You can try testing the factory connector on the Freestar with the Curt harness...
view full answer... - 4-Pole Trailer Wiring Harnesses for 2004 Mercury MontereyIf your 2004 Mercury Monterey has the 3 relays and 2 fuses installed then chances are good that it also has the tow package plug-in connector to mate with 4-pole harness # 56073. But if you are not sure you can still install a 4-pole harness by using kit # C56673. This harness comes with the needed relays to activate the plug on the back of your Monterey. This 4-pole harness will provide stop, turn and tail light signals for a 4-pole-equipped trailer.
view full answer... - Recommended Trailer Wiring Harness For A 2014 Ford F-150 XL Without Factory Towing PackageAs your 2014 Ford F-150 XL did not include the factory towing package, you will need to use a hardwire kit, like the Curt # C58044. There will not be a T style connector available, unfortunately. The Curt harness # C58044 will include quick splice connectors to make the wiring a lot easier though, and you will not actually need to cut any of the wires to get it installed.
view full answer...
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Video Edited:
Joshua S
Expert Research:
Adam R
Installed by:
Cole B
Updated by:
Wilson B
Updated by:
Kristina F
Updated by:
Isabelle B
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K S.
2/28/2018
Perfect. I still love it. convenient!