Curt Tail Light Converter with 4-Way Flat Trailer Connector
(349 reviews)
Price: $27.56
In Stock
Curt Tail Light Converter with 4-Way Flat Trailer Connector
Item # C56175
Retail:$53.53
Our Price: $27.56
You Save: 49%
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- Reviews (349)
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CURT Custom Fit Vehicle Wiring - C56175
- Universal Fit
- Trailer Hitch Wiring
- 4 Flat
- Powered Converter
- CURT
Built to last, this tail light converter with a 76" 4-way flat harness is made using surface-mount technology. Designed for vehicles that have amber turn signals and incandescent bulbs. Includes wire taps and color-coded wires.
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)
- Ensures that your vehicle's wiring matches that of your trailer
- Designed with safety in mind
- Guards against electrical shorts and mis-wire situations
- Connects directly to your vehicle's wiring with the included quick-splice connectors
- Bonded wires are color coded to ease installation
- Resists shock and vibration for superior operation on rough roads
- Circuit board is constructed using surface-mount technology (SMT), an improvement over through-hole construction
- Includes a durable, molded-rubber, female output socket with protective dust cover
Specs:
- Application: vehicles with 3-wire electrical systems and incandescent tail lights
- 4-Way harness length: 76"
- Ground wire length: 16"
- Splice-in wire length:
- Brown, red, yellow: 16"
- Green: 60"
- Max amperage:
- Turn lights and brake lights: 3 amps per circuit
- Tail lights: 5 amps per circuit
- 1-Year limited warranty
Do I Need a Tail Light Converter?
Some vehicles operate on a 3-wire system, wherein the brake signal and the turn signals run on separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a 2-wire system, which means the brake and turn signals travel along a single wire. You'll notice that, on your trailer, the brake light will flash for the turn signals.
If your vehicle operates on a 3-wire system, it will need to be converted so it will be compatible with the wiring system of your trailer. This is where a tail light converter comes into play. This converter lets you combine the brake and turn signal functions of your vehicle so they run on a single wire to properly activate your trailer's tail lights.
Converter Wiring Configuration
| Wire Color | Wire Function |
|---|---|
| Green | Right turn |
| Brown | Tail lights and parking lights |
| Red | Brakes |
| White | Ground |
| Yellow | Left turn |
Tail Light Converter Installation
To begin the installation, use a circuit tester (sold separately) to double-check the function of each wire on your vehicle's tail light wiring harness. The color/function of the splice-in wires on this converter may not match the color/function of those on your vehicle, so you'll want to be sure to check all of the wire functions first. Once you've figured out the functions of your vehicle's wiring, use the included quick-splice connectors to connect the corresponding wires on the trailer connector. Quick-splices, or "wire taps," offer a quick way to make connections without you having to strip and twist wires. Just place the wires in one of the taps and snap the cover down.
Use double-sided tape to stick the converter box to a flat surface inside your vehicle near the tail lights. It's helpful to clean the surface first so the tape can adhere fully.
Find a raw, unpainted metal surface to use as a grounding point and secure the white ground wire with the included self-tapping screw. Cleaning the surface prior to securing the white wire will ensure the converter is fully grounded. Finally, secure the converter wires to your vehicle using cable ties (sold separately).
Quick Tips:
- Butt connectors - especially heat-shrink ones - provide the most secure, longest-lasting connection, so we'd recommend you grab a few and swap them out for the quick-splices in this kit.
- Use a circuit tester on the plug terminals once the harness is installed to make sure everything's working. There's nothing worse than figuring out that you have a bad ground or a faulty connection right before you're about to hit the road.
- Be sure to put a little bit of dielectric grease on the 4-way plug to protect the terminals from dirt, grime, and corrosion.
Built Using Surface-Mount Technology
Curt builds each tail light converter using surface-mount technology (SMT). This construction method 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 smaller circuit board that provides more routing area and that offers superior performance, reliability, and durability.
Circuit boards constructed using SMT 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, increasing durability and lifespan. In addition, lower resistance levels ensure better performance, especially for parts that operate at higher frequencies.
Each Curt circuit board is made using high-quality components pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.
56175 Curt Wiring Harness with Vehicle End 4-Pole Connector and Tail Light Converter - 76" Long
Installation Details
This Product Fits The Following Vehicles
- 1992 - 1994 Audi 100 Sedan and Wagon - excluding Turbo
- 1974 - 1974 Volvo 140 Series
- 1974 - 1975 Volvo 160 Series
- 1988 - 1993 Mercedes-Benz 190
- 1988 - 1993 Mercedes-Benz 190 Sedan - 201 Chassis
- 1997 - 1998 Nissan 200SX
- 1977 - 1985 Mercedes-Benz 230 Coupe and Sedan
- 1977 - 1985 Mercedes-Benz 240 Coupe and Sedan - D
- 1975 - 1992 Volvo 240 Series
- 1993 - 1993 Volvo 240 Series Sedan and Wagon
- 1995 - 1998 Nissan 240SX
- 1976 - 1982 Volvo 260 Series
- 1977 - 1985 Mercedes-Benz 280 Coupe and Sedan - C and CE
- 1977 - 1985 Mercedes-Benz 300CD Coupe and Sedan
- 1977 - 1985 Mercedes-Benz 300D Coupe and Sedan
- 1979 - 1980 Mercedes-Benz 300TD Wagon
- 1981 - 1986 Mercedes-Benz 300TDT Wagon - 123 Chassis
- 1979 - 1986 Mercedes-Benz 300TE Wagon - 123 Chassis
- 1990 - 1996 Nissan 300ZX
- 2006 - 2006 Nissan 350Z Coupe
- 2004 - 2006 Nissan 350Z Coupe
- 1987 - 1995 Toyota 4Runner
- 1987 - 1995 Toyota 4Runner
- 1983 - 2002 Mazda 626 Sedan
- 1988 - 1988 Audi 90 Sedan
- 1996 - 2001 Audi A4 Sedan
- 2002 - 2010 Audi A8
- 2006 - 2006 Hyundai Accent
- 1995 - 2006 Hyundai Accent
- 2007 - 2011 Hyundai Accent 3-Door Hatchback See All Vehicle Fits
California residents: click here
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
- Defective
Customer Reviews
Curt Tail Light Converter with 4-Way Flat Trailer Connector - C56175
Average Customer Rating: 4.6 out of 5 stars (348 Customer Reviews)
Built to last, this tail light converter with a 76" 4-way flat harness is made using surface-mount technology. Designed for vehicles that have amber turn signals and incandescent bulbs. Includes wire taps and color-coded wires.by: Michael 04/12/2024
Worked out perfectly for what I needed to wire it into. The online ordering was very prompt on getting it out and I received the package a day earlier the expected. Vary simple instructions to follow and seems to be made with quality in mind. Works perfectly and should last the life time of the vehicle.
by: Matthew 10/26/2022
2004 Honda Civic
Worked great on my honda civic.
by: JC from NC07/29/2021
eTrailer gets a grade of A+. The actual part gets a grade of B-. Two of the wires arrived slightly damaged - luckily near the cut end so I didn't have to lose much length. The sticker identifying the 4 wires on one side and 5 wires on the other was upside down, so I peeled it off and reapplied (my OCD kicking in!). I wanted to keep my original quick release plugs on 1996 Jeep Cherokee Sport & was able to do that. Used heat shrink connectors between them & Curt Converter. All lights on vehicle & trailer working perfectly again!
by: Tom 08/07/2023
ups sent me a email stating eta aug 7
needed part nlt friday paid extra for o/n service
called etrailerw/eric and he traced the and said it would be here as irequested
thanks for correcting ups msg
will use your company for any parts i may need and also as we travel will recommend your company
thanks tom walters
by: Phil 05/02/2024
works as designed no problems
by: Sean05/04/2020
The quick splice were a bit oversized for my Audi wiring. Required me to wiggle it a bit to get a good connection to the, my guess 22ga, wire. Could also use at least a few more zipties. Otherwise, this is a good kit.
by: Robert 05/01/2024
works great !
by: Guy 05/24/2023
1996 Geo Tracker
I LIKE TO STAND BACK AN LOOK AT WHAT I AM HOOKING UP AN I TRACK THE RIGHT SIDE WIRE DOWN ON THE LEFT SIDE AN WIRED IT ALL ON THE LEFT SIDE IT MAKES IT SO MUCH NICER.. 96 GEO TRACKER 4X4
by: Dennis01/16/2023
2000 Honda Civic
The online fit guide stated that this would work for my 2000 Honda Civic, but after installation (double checked for proper installation) only one brake light worked on the trailer.
Brooke M.
1/23/2023
I am sorry to hear you are having issues with this. It sounds to me like there is a bad ground connection. You may want to double check once more and just make sure your ground wire has a direct, clean, and secure connection. So often, when it comes to wiring, the ground connection is the issue.
by: Robert 02/11/2024
2000 Volkswagen New Beetle
works great
by: Curtis 08/25/2013
1999 Oldsmobile Intrigue
Fairly easy to attach just had to double check the wiring on the car and had to sandpaper away some paint in order to get a good ground connection.
by: Andrew03/31/2022
I bought this kit for my 1994 Jeep Cherokee XJ and while it seemed like a good purchase at the time, unfortunately after installing it myself found issues with it. Driving lights on the trailer worked as they should, left and right blinker were extremely dim as were the brake lights. I tried a friends trailer and had exactly the same issue. Used a multimeter to check for correct voltage and continuity, everything seemed to check out fine. Problem persisted even after taking it to an auto electrician, so after about a month of trouble shooting and spending more money than I wanted to in diagnosis I ended up buying another 'plug and play' from a local auto parts store and after installing that one myself all the problems I had before vanished.
Jenny N.
4/7/2022
I will have our Customer Service team reach out to you. It is possible that the ground also needed to be checked. We do have a FAQ that helps with trouble shooting.
Helpful Links
by: Corey 05/05/2021
2004 Volkswagen Jetta
I've been using this wiring harness for around a year now and it's performed amazingly. I have a 2004 VW Jetta Wagon, picked up some cheap female "pin" connectors as my taillights on my car had pins that you could just slide a connector on to. I was able to use this method to install this harness without actually cutting into any of my cars wiring. Working amazingly.
Corey
5/6/2022
Still working great 2 years after purchase. No complaints at all.
by: Charles J.08/05/2013
2004 Saturn Vue
Was very happy and satisfied with my purchase and delivery of my product. Insulation went very well.
by: Naomi04/25/2023
1996 Ford Escort
Nice quality because the shank that goes into the hitch is solid but hallow like the ones from other sources.
by: Liam02/28/2013
1999 Toyota Tacoma
Good price, product was perfect, and the shipping was quick. Problem solved. T-taps are sort of miserable, but that's on the installer, not the product - cutting, soldering, and heat shrinking is definitely the way to go.
If you have a problem with your 'Yota truck lighting acting wonky, chances are very high this unit is your issue! Mount it up high, on the bottom of the bed to keep it dry and give it decent life. The harness cover is a nice touch that does not come with all of these - pack it with dielectric grease, and you'll get many years out of this.
Good job, etrailer!
Patrick B.
3/4/2013
We have seen some wonky trailer light issues with Toyotas when adding aftermarket harnesses like this. Typically the issue is the ground. The Toyota frames do not ground as easily as other makes. Sometimes we have to move the ground or extend it to a factory ground point in order for the system to function correctly.
by: David W07/06/2013
1998 Volkswagen Beetle
The Circuit Protected Converter # SMT C56175 trailer lighting harness for my 1998 VW Beetle arrived within a few days and was easy to install with the include instructions!
All trailer lights worked perfect the first time they were checked after the install! Great job to ALL of you at etrailer.com
David W.
1/4/2015
From the day I installed the SMT C56175 Converter, I have had no problems at all! This is a well designed, high quality item that I would highly recommend to anyone!This item still gets a five star rating all day long!All The Best,David W
by: William09/03/2022
Did not work with my application. To this day I still don't have working trailer lights.
David B.
10/8/2022
Ill have CS reach out to you William. In the meantime I would double check your grounds, look for damaged wires and loosecorroded connections.
by: Jordan 12/19/2022
2009 Kia Sportage
This kit worked perfectly for my 2009 Kia Sportage. It had all of the parts I needed and the only real challenge was trying to identify the correct wires to splice into.
by: Mark 10/06/2023
Great job.
Thanks
by: Alan11/22/2018
Honda
I installed this on my motorcycle, a 2004 Honda VTX 1300S. The converter itself is attached beside the license plate, exposed to the weather. It has functioned flawlessly for almost a year now, through Kansas cloudburst, desert heat and mountain freeze. If I should ever need another (not likely), I will get the same model.
Alan
11/27/2019
A year later and it still works just fine.
by: Scott D11/11/2013
Suzuki XL7
The product works fine. I Youtube video for installing a harness on a Suzuki XL-7 IS NOT this product. If you're not a very handy person you may have problems getting this installed. I figured it out but I'm pretty handy. The video show them just plugging it into a 6 pin connector inside the left rear qarter panel. But the harness itself has no matching connector. You have it splice each wire to a wire on the car.
Patrick B.
11/11/2013
The video that we had was for wiring in Tow Ready part 118372 [no longer available].
by: mj01/26/2015
1996 Ford Aerostar
This kit worked great. Your car or truck may need a little extra wire for the right turn signal but I am very very happy with the quality of the materials and install. Hauled my trailer safely today and did not have to redo any connections!
Mj
2/6/2016
It works
by: Darrell N.06/17/2014
great wire harness, could not have been easier for the "common man" to deal with ! came with the hitch, I paid for it, but same package so didn't have to wait for a second box.
Darrell N.
6/17/2015
WONDERFUL!!
by: Jeff10/10/2018
1996 Jeep Cherokee
Something is defective with this unit. While the running light circuit is fine, the circuits that convert the brake and turn signals into a single circuit (the essence of the device) is intermittent; sometimes it works properly, sometime only the left light responds, sometime only the right, sometimes nothing. I believe the problem is due to a bad diode in the unit. I am experienced with these devices, so it is not an installation error. Due to the installation, I am unable to return the unit in unused condition.
1996 Jeep Cherokee.
FYI- this unit was purchased to replace a similar unit that started having a different problem after ten years of use.
Mike L.
10/10/2018
When a wiring harness is acting up, the first thing youll want to do is isolate the cause to the vehicle or the trailer wiring. Use a standard incandescent circuit tester like our part 40376 on each pin of the trailer connector as each function is activated. If youre not getting signal on the trailer connector pins, try testing on the input side of the converter. If the signal is entering but exiting the converter box, youll have confirmed that the converter is bad. Youll also want to ensure that the ground connection is secure. An insufficient ground can cause all kinds of odd behavior in the lighting. Ill link you to an help article on trailer wiring troubleshooting.
Helpful Links
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Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Sarah L
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
John H
Expert Research:
Adam R
Expert Research:
Jeffrey L
Video by:
Andrew K
Video by:
Joshua S
Video by:
Dustin K
Test Fit:
Nicholas E
Test Fit:
Andrew S
Video Edited:
Jacob T
Video Edited:
Chris R
Updated by:
Adele M
Updated by:
Wilson B
Updated by:
Kristina F
Updated by:
Isabelle B
Updated by:
Sabrina W
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Matthew
10/27/2023
I bought and installed the wiring harness a year ago and its been working great! Thank you etrailer for a great product