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Towing setups can overload a vehicle’s wiring if not properly managed. This Curt 4-Way Flat Trailer Connector with Circuit Protected Powered Tail Light Converter shields your vehicle from overcurrent and overvoltage situations. The built-in powered converter pulls power directly from the battery instead of the lighting circuits, keeping sensitive electronics safe while delivering a steady signal to the trailer.
Many newer trailers use LED lights that draw much less current than old incandescent bulbs. This harness is designed to work with both LED and standard trailer lights without triggering false errors or low-power faults. It provides a clean, consistent signal so your running lights, turn signals, and brake lights all operate like they should.
You don’t have to worry about this converter draining your battery while parked. It only pulls power when a trailer is connected and the lights are active. That means you can leave it installed year-round without having to pull fuses or disconnect wires between towing trips.
A standard 4-flat connector gives you the essential lighting functions—running lights, turn signals, and brake lights—so you can tow safely and stay visible. Once spliced into your vehicle’s tail light circuits, it provides the reliable link needed for hauling small trailers, utility haulers, or cargo carriers.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Arrived on time and packaging was very secure andneat
I can't believe I have to use this universal kit for my Corolla Cross just because it is an XLE and you (Curt) cannot figure out how to make a plug and play kit like for all other models of Corolla Cross.
This is my second order from trailer and the entire experience has been PERFECT thank you
Contained everything pictured and worked well for running power to the powered tail light converter
Trailer electric harness arrived perfectly, installation was very straightforward, I am very satisfied with this product
It only lasted maybe 3 months after that it was dead to the world even hooked up straight to the battery no voltage out with a meter! Very dissatisfying
Easy replacement for the old one. No problems encountered at all. Recommended.
Easy installation with included parts.
Kenneth
8/26/2023
I installed this on my 2004 bmw325 and it was an easy install and it has worked great.
Worked fine, I easy to install.
Good Product and Great Service!
Works great
Installed this kit on my 2022 VW Passat. It works good however finding the right wire was a challenge. I wish that there was a plug and play taillight converter available.
I didn’t like the way it cut into the vehicle wiring, so I bought an OEM harness from Mazda for my 22 CX5. My dealer gave me great instructions and nice sealed connectors. YMMV- I think trailer is a great company and will do business again. The hitch I bought is FANTASTIC.
Have purchased a number of hitches and wire harness for a number of different vehicles I have owned. All products were easy to install and worked perfectly . The instructions were clear and quality of their products is top notch. I have used their customer service to ensure I was ordering the right product for a older vehicle (75 Toyota Landcruiser) they were patient and ensured I got the right set . Their customer service is matched by their pricing and that would be hard to beat . Delivery (Canada) was exceptionally fast. Probably not my last order and I have recommended this company and their products to my friends. If your considering a purchase I don't think you will be disappointed and you will be saving lots of money doing it yourself.
Working well!
Great Product and quick delivery and co mmunications
Work perfectly.
Wired up fast and works flawlessly. I pray it'll last longer than the non-curtis direct hook up connector harness I bought a couple of years ago(it lasted a year and then the black box smoked). Only issue is that it doesn't come with everything you need, but I already had a wire and extra stuff anyway! I used the blue smash in butt connectors supplied instead of soldering it in. Great power!
Joy was very helpful and friendly! She was very knowledgeable and helped me understand exactly what I needed! Items arrived one day earlier than promised!
Installed easily on my 2019 Sprinter RV. Works well which is something I could never say about the Sprinter tow system. Thanks to etrailer for the advice and excellent training videos.
Good instructions and working well.
As always etrailer provides excellent product, very reasonable prices and the support to help you with the installation and usage.
Finding the brake light wire was not fun but the rest was easy on my 2022 Prius.
etrailer is a great vendor to do business with. The Curt C56496 works well, but, requires a fusible link to power the unit but does not come with the link or the fuse. Otherwise, 5 star.
I installed this on a '17 Audi A4 allroad. I put behind the cover on the liftgate. The quick-splice wiring connectors may not work well if your car wiring is smaller than 18 gauge, so have some butt-connectors or a soldering iron on standby. The box itself is well constructed and potted so it should outlast the car itself.
Info for this part was:
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Peter
3/13/2023
Still working great. Absolutely no problems. Had to tap into the fine wires on my 2006 Nissan X-Trail near the spare tire. Also brought a higher gauge wire from the battery via a fuse in the engine compartment routed under the car. Highly recommended.