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  1. Custom Fit Vehicle Wiring
  2. Mazda
  3. MPV Van
  4. 2004
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FITS 2004 Mazda MPV Van
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 56010
Our Price: $41.98
Custom Fit Vehicle Wiring
Confirmed to Fit
2004 Mazda MPV Van

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Shipping Weight: 1.05 lbs
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56010 - Converter CURT Custom Fit Vehicle Wiring
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Call at 1-800-940-8924 for expert service. We are your Mazda custom fit vehicle wiring experts, and offer a great price. carries a complete line of CURT products for your Mazda MPV Van 2004. Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part 56010 from CURT can be ordered online at Complete custom fit vehicle wiring installation instructions and technical support.
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2004 Mazda MPV Van - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

  • Trailer Hitch Wiring
  • 4 Flat
  • Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your Mazda MPV Van with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.


  • 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 - no cutting or splicing of wires
    • Locate connection points in rear cargo area
    • Plug in T-connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • 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


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 5 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your rear cargo area.

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.

Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.

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.

Curt SMT Circuit Boards

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.

56010 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details 56010 Installation instructions

California residents: click here

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 56010

Average Customer Rating:  4.7 out of 5 stars   (27 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 - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.


Easy install, first time I've done this and it was a piece of cake. The in-line couplers make it easy. Good instructions, but not much info on the passenger side install. You need a 10 mm socket to remove a bolt in 2 locations, both part of a storage clip. After they're removed, pry back the molding to get at the plug. Mine was behind some foam padding (picture). Before I put it back together , I tested it with an inexpensive tester like Code: I26, Worked perfectly. Definitely recommend this product.

2005 MazdaMPV Van

Installed it in my 2004 Mazda MPV to allow me to use a rented U-Haul motorcycle trailer. I was really pleased to find this harness readily available now although the MPV has been out of production since 2005.
Given the very reasonable price I was truly surprised at the quality of this harness and the attention to detail paid in assembly (like the well applied heat shrink tube insulation) and accessories such as the included cable ties. I first thought the instructions were a little light but once I was actually working on the car I found them adequate, and the installation was straight forward.
I honestly could not be more pleased with product and delivery.

I use it only occasionally but so far it has been working just fine. Still perfectly happy.
bernhard l - 11/23/2017


Super easy install! The directions made it even easier!

MazdaMPV Van

Product, made by Curt Mfg., was perfect for my MPV Minivan.
Installed without a hitch (pardon the pun).
Tested on my boat's trailer, and worked as designed.

Great product.

Kudos to Curt. My second purchase of their products.

2004 Mazda MPV-Van

I ordered this item from mainly because their website was well thought out and made the most sense. So helpful in fact was their site that I didn't have to read the instructions when my item arrived. The installation was a cinch. The price was very fair and the delivery was very fast. I will definitely shop from in the future. They are very professional and I highly recommend them.


works as it should with no splicing or tapping of factory wiring. plugged right in and installation was easy.


Product was just like picture well build. the reason for a 3 star is shipping could not track order.Base on quality would ordered again great products.


VERY EASY AND QUICK, JUST FOLLOW INSTRUCTIONS. No need to splice anything. Ease of installing wiring is why I decidet to do self install of hitch & wire, rather than pay $400 to have it done


Well thought out design. Installation instructions concise and straightforward. Color pictures a nice touch.


Im honestly shocked at how easy this was, Ive been paying Uhaul to install my lights for years! They normally charge 125-150$, this took me 10 minutes to install, and it worked perfectly, the included instructions guided me nicely through the process.


This product worked exactly as advertised. It was very easy to use and has worked perfectly since the installation.

2004MazdaMPV Van

Easy install with instructions specific to wife's van. Tucks away out of sight when not in use and no tangled mess.
Very fast delivery of order, greatly appreciated.

2002 MazdaMPV Van

Very good product easy installation and works perfectly on my 2002 MPV

2005 MazdaMPV Van

Worked well. Install video was very helpful. Thank you!

2003 MazdaMPV Van

A greatproduct delivered in 4 days when othersaid a long wait. s

Works great. Made for an easy install.
Johnny g - 07/10/2018

2005 MazdaMPV Van

The part arrived within 3 days from when I ordered it. I t is exactly as pictured. I would order from etrailer again.


The product arrived promptly, fit perfectly, and there have been no problems.

2005 MazdaMPV Van

Shipment arrived a day early, all needed parts fit, install was easy!
Very good product and easy to order.


Works just fine. No problems.


2004MazdaMPV Van

Fit perfectly and good instructions. Much better connections than I had before.


The product I ordered was shipped quickly and received when promised. Thank you for the great customer service.


T Connector system was easy to install and works great..



Show More Reviews

See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Trailer Wiring Installation on a 2001Mazda MPV
    The Curt Circuit Protected T-Connector Vehicle Wiring Harness - for Mazda MPV, item # 56010, will be installed inline with the connectors at the rear of the vehicle tail lights. On the drivers side and the passengers side you will need to remove the push pins, trim panels, cargo hooks and jack cover to access the tail light wiring. Once the wiring is located you will just have to disconnect the connectors, making sure not to break the locking tabs, and plug the new harness into the existing...
    view full answer...
  • Troubleshooting a Curt Trailer Harness, Brake and Left Blinker Not Working
    The first thing I would do is test for voltage between the tail light connectors and the convertor box to see if the correct voltage is going into the box, but none is coming out on the green wire. This will tell you if the problem is in the box or if it is in the connector. If you see voltage on the brake and left flasher circuit going into the box, but none coming out then you know the problem is in the box. If there is no voltage on the circuit going into the box either you know the...
    view full answer...
  • Trailer Wiring Recommendation and Installation Instructions for 2000 Mazda MPV
    We don't have an install video yet for the Curt harness part # 56010 that you referenced, but I did attach a set of installation instructions that will walk you through the process on your 2000 Mazda MPV Van.
    view full answer...
  • Installation Process for Curt Trailer Wiring Harness # 56010 in 2004 Mazda MPV Van
    We have not yet had a chance to video an installation of Curt wiring harness # 56010 in a 2004 Mazda MPV Van but the installation process is fairly simple, requiring only that you remove your taillight assemblies briefly to plug in the snap-together connectors and drill one small hole for the harness's ground wire ring terminal. These steps are all that are required to complete installation. The written instructions for this harness are linked for you.
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  • Availability of 5th Wheel Frame Brackets to Install Pullrite 2900 on a 2015 Ram 3500
    The Pullrite 2900 is designed for industry standard 5th wheel rails, so it would work with the Reese # RP56010-53 install kit you mentioned. For just the frame brackets and hardware, you'd need part # RP56010. However, because the Reese frame brackets and your existing bed rails (assuming they weren't manufactured by Reese) have not been tested together, so their capacity as a unit would be unknown. This is why we recommend using bed rails and frame brackets from the same manufacturer...
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  • Recommended Fifth Wheel Hitch For 2016 Ram 3500 With Short Bed And Ram Boxes
    There is a way you can tow your toyhauler with a short bed Ram 3500 with Ram Boxes. You will need to install a fixed fifth wheel hitch and then a Sidewinder pin box on your trailer. I recommend part # RP56010-53. This will give you the standard in-bed rails. You will then need to replace the pin box with a Sidewinder. The Sidewinder you choose will be based on the pin box you have on your trailer. There should be a sticker or plate that has the pin box number. Just let me know what pin...
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  • Will 5th Wheel Trailer Hitch Install Kit from a 2013 Ram 2500 Fit a 2015 Ram 3500
    Like you said, the brackets required to install a 5th wheel hitch are different between the 2013 and 2015 Ram trucks so the kit off of a 2013 will not fit a 2015. For the 2015 Ram 3500 short bed you would need kit # RP56010-53. I have included links to the installation instructions for you.
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  • Fifth Wheel Mounting Brackets for 2014 Dodge Ram 3500 with 8 Ft Bed
    In order to determine if there are mounting brackets available for your 2014 Dodge Ram 3500 using the rails from your 2006 Chevrolet, I will need to know what brand of rails you have and whether they are a 4-bolt or 10-bolt. I have attached a picture that shows the two different types of rails. If unable to use your current rails, we do offer the Reese Quick-Install Custom Base Rails and Outboard Installation Kit, # RP56010-53. This kit includes the custom installation brackets which dramatically...
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    Image 1 for
  • Troubleshooting Curt T-Connector Wiring Harness # 56010 with Left Blinker Always On
    Thank you for clearly describing the issue you are having with your Curt T-Connector trailer wiring harness # 56010 and also the troubleshooting steps you have taken to diagnose the issue in your Mazda MPV van. Apply your circuit tester (such as # 40376) to the yellow wire leading from the left T-connector to the left (input) side of the harness. This is the wire that carries the left turn signal from the vehicle. If this wire carries a 12V signal without the turn signal engaged then the...
    view full answer...
  • Hitch and Timbren System Recommendation for a 2002 Mazda MPV Van
    I attached a link to the hitch install video you referenced that shows a no discontinued Hidden Hitch on a 2003 Mazda MPV. I was able to get it to play all the way through so hopefully the issue you had with the video has resolved itself. If not, maybe try a different web browser. We currently have the Curt Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4" # C12288. And for trailer wiring use # 56010. There is a Timbren system confirmed to fit your vehicle as well. Check out part...
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    Image 1 for
  • 2 inch Hitch Recommendation for a 2005 Mazda MPV
    The two different MPV's you mentioned are of different generations so the hitch fits between the two aren't the same. For your 2005 you would want the part # C12288 which is a confirmed fit. This is a 1-1/4" hitch, and the only one available. There are no 2" hitches avalable. For trailer wiring you would then want the part # 56010.
    view full answer...
  • Reese Outboard Bracket 5th Wheel Trailer Hitch Installation Kit for a 2016 Ram 3500
    The Reese outboard bracket 5th wheel installation kit for your 2016 Ram 3500 is actually # RP56010-53. It fits short and long bed versions. I have included links to the installation instructions for you.
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  • Recommended 5th Wheel Base Rails for 2020 Ram 3500 For Use with Curt 5th Wheel Hitch
    I have a solution for you, but Curt does not have any installation kits available yet for the 2020 Ram 3500. The good news is that because you don't have the OEM prep package, you'll just need a set of industry standard base rails to be compatible with your existing hitch. I recommend using the Reese Quick-Install Custom Outboard Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches # RP56010-53, which will give you industry standard base rails in your truck bed compatible with...
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  • Reese 5th Wheel Brackets That Fit A 2015 Ram 3500
    For your 2015 Ram 3500, we have the Reese Quick-Install Custom Outboard Installation Kit w/ Base Rails for 5th Wheel Trailer Hitches # RP56010-53. For just the brackets, you can use # RP56010. These rails are confirmed to fit your truck with the 6-1/2' bed and 8' bed, and measure 48" long, and 1-7/8" tall. If you're also needing a hitch, # RP30928 will work great with if you have a long bed, or you can use # RP30051 if you have a short bed.
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  • Rail Kit Needed for Installing Reese M5 in Bed of 2019 Ram 3500
    To install the Reese M5 fifth wheel hitch part # RP30928 in the bed of your 2019 Ram 3500 all you need is a custom install rail kit part # RP56010-53 which will install quickly and not require frame drilling. I attached an install video for the rail kit on a similar Ram for you to check out as well.
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  • What Kind of Suspension Enhancement will Fit My 2002 Mazda MPV Van?
    We do have a suspension enhancement system that works for your 2002 Mazda MPV, but Air Lift # AL60759 does not fit. Currently the only suspension enhancement we sell for your application is the Timbren jounce spring # TMRMPV. This jounce spring only works with the 2wd van. The Timbren system is easy to install and is maintenance free. A Timbren jounce spring is a good idea because you don't need to add air before towing and there aren't any leaks to worry about. Air helper springs are good...
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  • Does Demco Hijacker Autoslide 5th Wheel Trailer Hitch Fit Reese Outboard Custom Install Kit
    The Demco Hijacker Autoslide, part # DM8550034, fits into industry standard fifth wheel rails such as the Reese install kit, part # RP56010-53 so they work great together. The install kit is custom designed for 2013 to 2018 Ram 3500 models with either the short or long bed. If you have a different truck let me know the year, make, model, and bed length and I'll recommend the correct install kit for you. I've also linked some videos of the install kit and the Demco for you to take a look at.
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  • Fifth Wheel Trailer Hitch Recommendation for 2017 Ram 2500 Short Bed Towing Keystone 284rdbwe
    I checked out the Keystone 284rdbwe you have and it has a tapered nose designed to allow it to be towed with a short bed truck and not need a slider. For your 2017 Ram 2500 with a short bed that does not have the factory rail kit I would go with a stationary hitch since you don't need the slider and slider hitches are much heavier and have more moving parts which means more movement. So for a hitch the # RP30047 would be a great choice. Then for a rail kit I'd recommend a custom fit kit...
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  • Fifth Wheel Hitch and Rail Kit Recommendation for 2015 Ram 3500 Short Bed with Sidewinder
    You will need to remove the pin box of the trailer and replace it with a Sidewinder pin box. Sidewinders are pin box specific so you will first need to know what pin box you have now in order to pick out the correct one. There should be a sticker or a stamping on the OEM pin box of the trailer that will list the pin box number that is on the trailer. Once you figure out which pin box you have you can check the FAQ I attached that has a chart that shows the correct Sidewinder to get based...
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  • Could a 2015 Ram 3500 Tow a 16,000 lb Travel Trailer
    Your 2015 Ram 3500 would have no problem towing a 16k fifth wheel trailer. You can check the towing capacities in the owners manual but I can guarantee they capacities are higher than needed to tow a 16k fifth wheel trailer. To use the Reese Select Plus fifth wheel hitch # RP30081 that you referenced will only require the installation of a fifth wheel rail kit. For you truck you would want the part # RP56010-53 since your truck has a long bed without the hitch prep package.
    view full answer...
  • How to Determine if a 2000 Mazda MPV Van has Ground Effects
    From what I could find it appears that models that do have the ground effects will have a trim piece at the bottom of the rear bumper that also wraps around to the sides of the vehicle. I included a picture with an arrow pointing to the area in question next to a van that does not have that trim piece. However, I do recommend contacting a Mazda dealer and have them run the VIN number and they can tell you what options came with the van. The hitch # C12288 will work on you MPV Van whether...
    view full answer...
    Image 1 for
  • Towing a 5th-Wheel Trailer with 2017 Ram 3500 Short Box with RamBox
    I do have a possible solution for you, however we do not currently have a Reese Elite below bed installation rail kit that is confirmed to fit your 2017 Ram 3500 short box with RamBox. Because your truck is equipped with the RamBox feature, which results in a narrow truck bed, I recommend using a fixed 5th-wheel hitch along with a Reese Sidewinder Pin Box. The Sidewinder will move the pivot point 22 inches behind the king pin and is needed to prevent the pin box from contacting the RamBox...
    view full answer...
  • Fifth Wheel Rail Kit, Hitch and Sidewinder Recommendation for a 2013 Ram 3500 Short Bed
    Since you have a Rambox the only solution you have for towing a fifth wheel trailer is to use a Sidewinder pin box like what you said you were interested in. However, you should note that Reese does not confirm that the Sidewinder will work with the Rambox. We have only heard from people who have tried it and it did work for them. Surprisingly there isn't an underbed Reese Elite setup I can recommend for your vehicle. I checked with Reese and the removed their listings for your vehicle. The...
    view full answer...
  • 5th Wheel Trailer Hitch Installation Kit for a 2014 Ram 3500
    I checked with Husky and they do not currently have a 5th wheel installation kit/brackets for the 2014 Ram 3500. If you need a kit right away you will need to purchase a complete kit because brackets and rails from different manufacturers cannot be used together. For a custom installation kit you can use Reese kit # RP56010-53. I have linked the install instructions for you.
    view full answer...

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