Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
(2 reviews)
Price: $79.02
In Stock
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Item # C56389
Retail:$135.95
Our Price: $79.02
You Save: 42%
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- All Info
- Reviews (2)
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CURT Custom Fit Vehicle Wiring - C56389
- Custom Fit
- Trailer Hitch Wiring
- 4 Flat
- Powered Converter
- CURT
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.
Features:
- Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
- Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
- Connects quickly and easily
- Locate connection points behind tail lights
- Plug in T-connector
- Run hot lead to car battery
- Includes a powered tail light converter that connects directly to your battery to avoid overloading vehicle's electrical system
- Constructed using surface-mount technology (SMT) for consistent, reliable performance
- Maximizes trailer light yield and intensity while producing minimal heat
- Ensures superior operation in rough road conditions
- Comes with dust cap for 4-way flat connector
Specs:
- Maximum amperage:
- Stop/turn lights: 3 amps per circuit
- Tail lights: 6 amps per circuit
- Limited 1-year warranty
Installation
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies to access this harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.
Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area.
It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
Powered Tail Light Converter with Surface-Mount Technology
A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.
Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.
Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.
Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.
56389 Curt T-Connector - Surface Mount Technology - 4 Wire
Installation Details
This Product Fits The Following Vehicles
- 2018 - 2020 Buick Regal Sportback
- 2018 - 2020 Buick Regal Sportback excluding GS
- 2018 - 2020 Buick Regal TourX
- 2018 - 2020 Buick Regal TourX
California residents: click here
Customer Reviews
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56389
Average Customer Rating: 4.5 out of 5 stars (2 Customer Reviews)
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.by: Chris 01/18/2023
Had it installed as part of hitch install with intent to tow small boat trailer, but never got a chance to take the boat out last year, so I never really tested the harness' operation in real life.
by: Leonard 09/14/2022
2
2
See what our Experts say about this CURT Custom Fit Vehicle Wiring
- What is Towing Capacity of 2018 Buick Regal TourXLooks like your 2018 Buick Regal TourX has a towing capacity of 1,000 lbs so you'd need either a smaller trailer or a larger tow vehicle to tow your trailer that weighs 1,600 lbs. The Draw Tite hitch part # 36661 that you referenced is a confirmed fit though and would be a great hitch to use. It's a Class II with more capacity than your vehicle so it would easily handle up to 1,000 lbs. For trailer wiring the kit you'd want is the Curt part # C56389 which is easy to install and very reliable. For...
view full answer... - Trailer Hitch Receiver For 2018 Buick Regal TourX Using 2 Bike Rack and Cargo CarrierThe Curt Trailer Hitch Receiver # C12173 is only available with a 1-1/4" receiver tube on your 2018 Buick Regal TourX. You can use a Curt Trailer Hitch Receiver Adapter # C45785 to allow you to still use your 2" hitch mounted accessories. The adapter does reduce the receiver capacity by 50%, which would allow you to carry 175lbs with the Draw-Tite receiver. I recommend using a Roadmaster Quiet Hitch for 1-1/4" Trailer Hitches # RM-061-125 to remove the rattle in the adapter to the receiver...
view full answer... - Are Separate 12V Power Feeds Needed for Curt 4-Pole Harness and Autowbrake Trailer Brake ControllerYou can install both the Curt 4-pole wiring harness # C56389 and the Autowbrake Trailer Mount Electric Brake Controller # 3430001 (and the required 7-way kit # ETBC7L) in your 2019 Buick Regal TourX but each one of these items must have its own dedicated power connection to the vehicle battery. I realize its no fun crawling under the car to route those power wires but this is critical for safety and for proper operation of these devices. For a worst-case example, if there were a fault...
view full answer... - Trailer Hitch and Wiring Recommendation for 2018 Buick Regal TourXFor your 2018 Buick Regal TourX I'd recommend the Curt hitch part # C12173 over the Draw Tite # 36661 although both are really great options with a similar design. The reason I recommend the Curt is that in general we see the best quality control from their hitches and it seems the powdercoat is a little stronger which prevents flaking and corrosion. Then for trailer wiring you will need the Curt T-Connector part # C56389 as it installs the easiest and is a great harness. Then for a...
view full answer... - How to Transport Power Chair on 2018 Cadillac XTS That Has Only 100-lb Allowable Tongue WeightI checked the online edition of the owner's manual for the 2018 Cadillac XTS and it does indeed state the maximum trailer weight is 1000-lbs, just as you mentioned, but is also notes that the tongue weight of the connected trailer should not exceed 10% of that maximum, which would then be 100-lbs. This note appears on the right-hand side of page 233. The three 1-1/4-inch Class II hitches offered for the car, such as Curt # C12115 shown on the linked page, all have the same rated maximum...
view full answer... - Recommended Trailer Wiring Harness for 2019 Buick Regal TourXBased on my research your 2019 Buick Regal TourX doesn't come from the factory with a pre-installed trailer wiring connecter but one can be easily added. For this I recommend the Curt T-One Wiring Harness # C56389. This custom harness simply gets plugged into existing ports behind the driver and passenger side tail lights. After running the hot lead up to the battery you will have a fully functional 4-Way connector to connect with and power a trailer's basic signal lights. I have attached...
view full answer... - Which Trailer Hitch Fits 2019 Buick Regal SportbackWe do have a hitch for your 2019 Buick Regal Sportback GS but the Curt you mentioned does not fit the GS models. I checked with them just now to confirm this. Draw Tite offers the # 36652 though that fits all models of the 2019 Regal including your GS so it would fit and work well. If you need trailer wiring Curt has an easy to install and very reliable kit with part # C56389 that fits your vehicle.
view full answer... - Recommended Trailer Hitch Receiver Compatible with 2019 Buick Regal Sportback AWDThe Curt Trailer Hitch Receiver # C12173 is only a fit for 2018 - 2020 Buick Regal TourX. For your 2019 Buick Regal Sportback, all the versions will use the Curt Trailer Hitch Receiver # C12185. So, that is the hitch receiver I recommend for your Sportback AWD. If you will be towing with this hitch, I recommend the Curt T-Connector Vehicle Wiring Harness # C56389, ball mount # C45521, hitch ball # A-82, and pin and clip # F-4.
view full answer...
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Edited by:
Lindsey S
Video Edited:
Jacob T
Installed by:
Cole B
Updated by:
Wilson B
Updated by:
Kristina F
Updated by:
Isabelle B
Written by:
Ronnie R
Test Fit:
Conner L
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Chris
1/19/2024
Product failed in Dec. 2023left blinker started showing up to the car as burnt out, but replacing the bulb didnt fix it. Removing the passthrough connection from the vehicle harness to the lights. Discussions and diagnostics with Curt tech support conclude its a failed device, out of warranty. Disappointing, considering its been used for towing exactly 2 times.