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Curt Upgraded Circuit Protected Powered Tail Light Converter - 4-Pole Flat Trailer Connector

Curt Upgraded Circuit Protected Powered Tail Light Converter - 4-Pole Flat Trailer Connector

Item # C56496
Our Price: $37.93
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Trailer Wiring
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Great Prices for the best trailer wiring from CURT. Curt Upgraded Circuit Protected Powered Tail Light Converter - 4-Pole Flat Trailer Connector part number C56496 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (19)
  • Q & A (0)
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  • Why etrailer?

CURT Trailer Wiring - C56496

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • Plug and Lead
  • 0 - 5 Feet Long
  • CURT


  • Adapts separate turn and stop lights (3-wire system) to a (2-wire system) on trailer
    • Requires a powered converter wiring kit (55151 - sold separately) to complete installation
  • Works with domestic and import vehicles
  • Virtually eliminates draw on vehicle tail light circuit
  • Potted enclosure resists water and vibration
  • Protects against overvolt, ESD, and short-circuits
  • No HD flasher required
  • Battery powered and circuit protected
  • Surface Mount Technology (SMT)
  • Does work with vehicles that have LED tail lights
    • Will work with trailers that have LED tail lights
  • Includes (4) Quick splices to aid in installation
    • Also includes 4-pole trailer connector cover


  • Pigtail length: 17" long
  • 4-Pole trailer connector length: 58" long from converter box
  • Amperage allowance:
    • 3.0 amps per turn/brake
    • 6.0 amps for taillight function

Warning: Overloading circuit can cause fires. Do not exceed product rating or tow vehicle's lamp load rating, whichever is lower. Read vehicle owner's manual and instruction sheet for additional information.

Surface Mount Technology (SMT) is a method for constructing electrical circuits where components are mounted onto the surface of printed circuit boards.

56496 Curt Circuit Protected Powered Converter w/ SMT

Replaces Curt 56146

Installation Details C56496 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt Upgraded Circuit Protected Powered Tail Light Converter - 4-Pole Flat Trailer Connector - C56496

Average Customer Rating:  4.9 out of 5 stars   (19 Customer Reviews)


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.


It's waterproof, so it's great for installing outside.


Easy installation with included parts.


Easy replacement for the old one. No problems encountered at all. Recommended.

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.
Peter - 03/13/2023


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.


easy install


Contained everything pictured and worked well for running power to the powered tail light converter


I put it in today and it works great! Great service at etrailer.


Received not installed specific for BMW X3 2021


Its good perfectly for my metris 2016




Wiring was properly installed and it works great!


No muss or fuss, this just works.








See what our Experts say about this CURT Trailer Wiring

  • What Does the 12 Volt Power Wire Do on the 2012 Honda CRV Wiring Kit by Curt
    The purpose of the 12 volt power cable that gets run to the battery of your 2012 Honda CR-V is to protect the delicate tail light wiring circuit. It does this by only using your tail light circuits as signal wires and using the power it gets from the battery to power the tail lights. This prevents the tail light circuit from being overdrawn. You will need to run this wire or the Curt Wiring Harness # C56496 will not function. I attached an FAQ on running this wire for you to check out. I...
    view full answer...
  • Trailer Wiring Recommendation for a 2016 Kia Sorento
    For trailer wiring for a 2016 Kia Sorento without a tow package you would want the trailer wiring harness part # 56146KIT. This is universal wiring kit that will work great for you. I attached an install video for you to check out as well.
    view full answer...
  • Troubleshooting Trailer Wiring Install Where all Circuits Are Active
    If all of the circuits of your trailer harness are illuminating all of the time that would indicate that you did not wire up the harness correctly. It sounds like the problem is the taillight circuit you used for the harness. You would want to use the circuit that only sees voltage when the running lights are on and not one that is connected to the brake lights.
    view full answer...
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  • Replacement Trailer Wiring Converter Recommendation to Replace Shorted One
    To replace the bad converter box you could use the # C56496. This will allow you to wire the converter to existing wiring of your vehicle and will come with a new 4-way connector. You will want to check the wiring of your trailer to find what shorted out your current converter before you replace it so that you don't short out the new one as well.
    view full answer...
  • How to Replace Just the Converter Box of a Curt Trailer Wiring Harness
    You could cut the old converter box out of your # C56164 and then install the converter box of part # C56496 in it's place. Normally we recommend to check the trailer wiring for any shorts and fix as necessary before connecting new trailer wiring so that the new box doesn't short as well. But since your trailer is brand new and works with your other vehicle you would most likely be fine.
    view full answer...
  • Testing Trailer Wiring Converter Box to Determine if it is Damaged
    If the trailer wiring was working properly why do you need to run that additional wire to the converter? It sounds like that is the problem. Only one source for the right turn and stop light circuit is needed. What you will want to do is test the wires going into the box of the converter box for voltage with a circuit tester like the # 3808 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test the output side of the box to...
    view full answer...
    Image 1 for
  • Troubleshooting Trailer Wiring that Stops Working when Vehicle Headlights are On
    What you described is a classic ground issue. The problem is that the added amperage draw of the head/running lights being on for your vehicle makes the trailer taillights a bit weaker. What you would want to is run the grounds of the light assemblies of your trailer back to the main ground harness of your trailer. I can almost guarantee that will fix the problem. I attached a help article for you to check out as well that covers 4-way troubleshooting.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2014 Jeep Grand Cherokee without Tow Package
    I did some checking and it looks like the correct wiring harness to give you a 4-way at the back of your 2014 Jeep Grand Cherokee would be the Curt Wiring Harness part # C56496. I attached installation instructions and an install video for you to check out.
    view full answer...
  • Troubleshooting Curt Trailer Wiring Harness Install on a 2000 Nissan Xterra
    The red wire of the Wiring Harness part # C56496 that you referenced should be run to the brake light circuit of your 2000 Nissan Xterra. If you are missing that connection I would recommend you verify that the other wires are securely connected to the correct circuits. Especially the black wire that needs to run to the positive terminal of your vehicle battery. If this connection isn't made, or the fuse isn't installed in the fuse holder the converter will not work. I attached an install...
    view full answer...
  • Trailer Wiring Recommendation for a 2010 Range Rover HSE
    Yes, we carry trailer wiring confirmed to fit the 2010 Land Rover Range Rover Sport HSE. The Curt wiring harness part # C56496 has been confirmed to fit your vehicle.
    view full answer...
  • How to Install the Curt Wiring Harness part # 56146KIT in a 2010 Town and Country
    To install the Curt Wiring Harness part # C56496 in your 2010 Chrysler Town and Country you will need to wire the harness by function and not wire color. The reason for this is what you already found out, the colors vary and all that really matters is the function. You will need to use the included circuit tester to test the different wires to determine their function and then wire them accordingly to the # C56496. I attached an install video for you to check out, but like I said you will...
    view full answer...
  • Does the Curt Upgraded Circuit Protected Powered Tail Light Converter Draw Power While Not In Use
    The Curt Upgraded Circuit Protected Powered Tail Light Converter - 4-Pole Flat Trailer Connector part # C56496 only draws power from the vehicle while a trailer is attached and the lights are activated. Therefore, you don't have to worry about it draining your battery without a trailer attached. If you choose, you could remove the inline fuse on the power wire that leads from the battery to the converter box but this would not really have any affect so I just recommend you leave it inside...
    view full answer...
  • LED trailer lights
    Yes, the Curt Upgraded Circuit Protected Powered Tail Light Converter part # C56496 will work perfectly with LEDs on a trailer. The wiring harness draws power from the vehicle's battery so you don't have to worry about faults with the vehicle caused by the amp draw of LEDs on a trailer.
    view full answer...
  • No Trailer Brake Lights 2006 Dodge Ram 2500
    It sounds like your converter may be bad considering you have power to the converter, but no power out. The next course of action would be to replace the unit with part # C56496. This is an upgraded unit by Curt, which has built in circuit protection to protect your vehicles wiring from overcurrent or overvoltage situations. Additionally, this will work with vehicles and trailers with LED taillights.
    view full answer...
  • Turn Signals Intermittently Working While Running Lights And Tail Lights Work
    If the signals are trying to draw more power when in function, but are only working intermittently, I would first check the ground contact point. This will be the white wire from the converter box. Make sure you have a clean, maybe even bare metal surface to give you a solid ground connection. You can use a little sand paper to remove any paint or coating to this surface that might hinder a quality connection when grounding. Also look for any possible kinks or bends in the power from...
    view full answer...
  • Curt Trailer Wiring Harness for 2014 Volkswagen Jetta TDi
    Yes, the Curt 56146 wiring harness is a universal trailer harness and works with your 2014 VW Jetta TDi. With that being said it is a discontinued product. The current part number that replaced it is part # C56496 which also works with your Jetta.
    view full answer...
  • Where are the Towing Light Fuses on a 2015 Jeep Grand Cherokee
    I checked the owner's manual for your 2015 Jeep Grand Cherokee and found all of the locations you need to check that relate to the trailer lights. There are several so it is certainly possible that you missed a few but I don't see any relays. These fuses are all located in the power distribution center (PDC) or aka fuse block under the bonnet next to the engine. There may also be fuses in the interior fuse panel but I was not able to look the locations up for you. F29 20 Amp Blue – Trailer...
    view full answer...
  • Tips for Finding Taillight Wiring on Hatchback Vehicle
    What you will need to do is find the rubber conduit that carries the wiring from the hatch lights to the door frame of the vehicle. Typically this is at the top of the door. If you look for a black rubber hose that runs from the hatch to the door frame that's what you need. Inside this will be the wiring for the taillights. You will need to use a circuit tester like what comes with the # C56496 to test the wires to find the correct circuits.
    view full answer...
  • Why Is Trailer Wiring Converter Harness Needed for 2007 Cadillac SRX
    In a lot of vehicle the turn signals are separate from the stop lights which is different from how trailer lighting works. That's why a converter is needed to match the circuit styles. Also a lot of vehicle't taillights can't handle the amperage draw of the trailer taillights so the power has to come from the battery which is what the # C56496 also allows.
    view full answer...
  • Trailer Wiring Recommendation for a 2014 Mercedes GLK
    The Curt trailer wiring part # C56496 is the confirmed trailer wiring recommendation for a 2014 Mercedes GLK like so it would be a great option if you are looking for trailer wiring. This is a universal type kit that will require hardwiring to the taillight wires of your vehicle though.
    view full answer...
  • Will Curt Trailer Wiring for a 2015 Acura TLX Short Out
    The only people that have problems with the Curt trailer wiring part # C56496 burning out are the ones who do not properly secure the converter box. If the box comes loose and starts banging around it will eventually burn out. Aside from that it is an excellent option that has been confirmed as a fit for your vehicle. We don't have any confirmed fit T-connector style harnesses for your vehicle so I am not sure if they have your vehicle confused with a different one like a regular TL.
    view full answer...
  • Trailer Wiring 4-Way Harness Recommendation for a 2005 Subaru Baja
    For your 2005 Subaru Baja there is a trailer wiring option confirmed to fit, but not a T-connector type that would plug inline. Instead you would need to use the hardwire kit part # C56496 that is a universal fit kit that will work on your vehicle. This is the best priced option we carry as well.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2002 Mercedes Benz M-Class
    The Curt Wiring Harness part # C56496 that you referenced is a universal fit wiring kit designed to fit your 2002 Mercedes M-Class as well as the VW in the product picture. I attached an install video that shows this wiring kit being installed on a very similar M-Class as yours for you to check out as well.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2014 BMW X1
    We have two curt wiring harness part numbers that have 56146 in them. Part number # C56496 and part # 56146KIT that also includes the wiring and fuse holder for routing the power wire of the kit up to the vehicle battery. Both of these converters have the SMT (surface mount technology) circuit board that makes them very reliable as opposed to the older style of circuit board that other harnesses may have. Since your 2014 BMW X1 requires the wire get run all the way up to the battery you...
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
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Employee Amanda M
Written by:
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