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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 # C55355
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Custom Fit Vehicle Wiring

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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. 1-636-306-4830 to order CURT custom fit vehicle wiring part number C55355 or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (15)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

CURT Custom Fit Vehicle Wiring - C55355

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 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 - 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 interior trim panel 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.

55355 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C55355 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C55355 Review

Today we're going to take a look at the CURT T-Connector Vehicle Wiring Harness with the Four Way Flat Trailer connector. This is a custom fit part. It's designed to fit the Pontiac Transport and Montana Vans, and the Chevrolet Venture, and Oldsmobile Silhouette Vans starting in 1997. Now on any custom fit part I always recommend to go to our website, use our fit guide, put in your year and model vehicle, and it'll show you if this'll work your application. Now this harness will provide this four way flat trailer connector at the back of your vehicle to power your trailer signal light. This whole harness connects very quickly and easily.

There's no cutting or splicing of wires. Basically what you'll do is locate the connection point for this T-Connector. It's in the rear cargo area behind the driver side storage compartment. Once you find that plug this into there, ground this white wire, and then you'll run your length of wire out the back with the four way, and you'll be ready to go supply the signal lights on your trailer. Now this harness does include this black box here. It's a tail light converter, and this converter is installed on here to insure that your vehicle's wiring will match that of your trailer.

The converter itself is constructed using SMT technology, which is Surface Mount Technology. It gives you a nice consistent, reliable performance. It will maximize your trailer light yield, and intensity while producing minimum heat, and it'll also give ya superior operation in any rough road conditions. The other nice thing is they do include this nice dust cap for your four way. Basically when you have your four way installed, you can just install the dust cap or dust cover onto it, and you can leave it on there if you'd like. Then when you're out plugging them into your trailer just go ahead, and put this over the terminals.

It protects those terminals from any damage or from the elements. Now this part is made in the USA. It does come with everything shown here on the table. I'm going to show you in a minute where these all install. It comes with a nice set of detailed instructions with pictures.

A few specs on this. For the converter the maximum amperage for the stop and turn light circuit is three amps per circuit. For the tail lights it's five amps total. Just briefly again with the set of detailed instructions it's 00:01:58 going to give you some nice pictures of where to find the connection for this. What you do is go to the rear of the vehicles, in the rear cargo area on the driver side rear storage compartment, you have to pop off some fasteners that hold the cover on, and underneath that you'll find the connector for this T-Connector right here. Once you do that plug that in, have the white wire with the eyelet on it . They do include a grounding screw that you can drill a hole, and make your good clean ground. Then on the converter they include a piece of double-sided tape that you put on that. Adhere this to a nice flat surface, so it doesn't bounce around. They do give you some cable ties that can help in adhering this down, or for even taking up any slack in the wiring. The other nice thing is they include four extra fasteners, because sometimes when you remove the fasteners on your . On the driver side of that storage compartment when you pop those fasteners off, if you happen to break one they do give you four extra ones that . To use for that. Otherwise once this is all installed you run this out the back, plug this into your trailer, and it'll supply the signal lights on your trailer. That should do it for the review on this CURT T-Connector Vehicle Wiring Harness with the Four Way Flat Trailer Connector.

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C55355

Average Customer Rating:  4.7 out of 5 stars   (15 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.

2003 Pontiac Montana

The trailer hitch installed in about 20 minutes and has functioned well towing small trailers. The wiring took a little longer to interpret the instructions, but once we got started, the install was very simple. I did not rate the product 5 stars because I have not put a significant load on the hitch to know how good it might be.

Oldsmobile Silhouette

Works great. Was difficult to find the vehicle in-line connector. It was hidden behind wiring and tubing for rear blower assembly. Once located, and pulled out to get to it, install was a cinch. But I did have to remove LR taillight assembly to get enough wire release to pull factory connector plug assembly out of it's hiding place. Obviously, it did not go back where it came from.

This van is the Premier version of the Olds Silhouette.

2004 Chevrolet Venture

Ordered this for my brothers 2004 Chevy Venture. Installation was simple: Plug and Play! It's been a year and it still works perfectly. Can't say enough about this company. Super fast shipping, and excellent tech support if you need it.

2001 Chevrolet Venture

Wow!. Fast service. I ordered this item on a Monday, maybe around noon. By the next day around 3:00PM it was at my doorstep via UPS Ground.
This item works exactly as it should and was a breeze to install. Just like the video on the etrailer website demonstrated, you just basically plug it in to an existing plug on the vehicle, (a 2001 Chevrolet Venture), and connect the white ground wire to the body of the vehicle. Thanks etrailer!



1997 Chevrolet Venture

Did not work. Took the vehicle to the local trailer dealership where they replaced the unit with one of theirs. Been working fine ever since.


it was complet was nice to have a hookup no wires to cut

2003 Chevrolet Venture

product was great fit perfect works great just as advertised
like all the help and instructions that are available

I would use this product and company again thanks

2003 Pontiac Montana

This is as good as it gets, watched the videos they had for my specific model 2003 Montana, did it by myself since I had no help, no problem. Perfect. They send you everything you need so you can't go wrong. A+++, extremely happy.

2004 Chevrolet Venture

very good,was delivered on time, and worked fine, I am happy with this product, thanks

ok I really aint used the trailor that much but it seems to be ok
Ronald - 06/28/2019

2004 Chevrolet Venture

Installed as advertised. Has given great service. Will definitely be back for future needs.


2001 Oldsmobile Silhouette

Was so easy to hook up. Fast delivery

2004 Chevrolet Venture

Great price!

2001 Pontiac Montana

fitment was very good


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

  • Troubleshooting 4-Way Installation with Curt Wiring Harness part # C55355 on 2001 Chevy Venture
    We never heard back from the guy with the 2001 Pontiac Montana. Without knowing exactly what problems you are experiencing with your trailer wiring on your vehicle the best thing I can recommend you do is check out the FAQ article and video I attached on troubleshooting 4-way installations.
    view full answer...
  • Where Does the C55355 Install On a 2003 Chevy Venture
    This T-connector will plug into your vehicles wiring harness that is located in the rear cargo area of your van on the drivers-side. I have included a photo showing the location in the rear cargo area of a vehicle similar to yours. I would recommend using some dielectric grease # 11755 when you are installing this wiring harness, this can be used on all electrical connection points and it helps to prevent corrosion. After you have completed the installation of the wiring harness, the...
    view full answer...
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  • Problems With Trailer Light Functions Using Curt Wiring Harness C55355 on 2001 Pontiac Montana
    Thank you for detailing your considerable efforts to troubleshoot the trailer lighting malfunctions you are experiencing with your 2001 Pontiac Montana equipped with Curt Tail Light Converter # C55355. Since you have tested the trailer with other vehicles and it has worked properly then the trailer would seem to have been eliminated as the source of the problem. Still, I suggest you check your trailer manual to confirm how much current is drawn by its lights. Curt T-Connector Harness #...
    view full answer...
  • Recommended Trailer Hitch And Trailer Wiring For 2003 Chevrolet Venture
    We have a few options for trailer hitches for your 2003 Chevrolet Venture. The # 24773 is not designed as a fit for your vehicle. My recommendation for a trailer hitch is the Curt Trailer Hitch, part # 13344. This is a Class lll hitch and has a 2 inch receiver opening. I recommend this hitch because it is more versatile than the Class ll or Class l trailer hitches with a 1-1/4 inch receiver opening. You can attach many more accessories and the hitch has a higher weight capacity. I have...
    view full answer...
    Image 1 for
  • Troubleshooting Curt Wiring Harness Issue on 1997 Chevy Venture LS.
    If everything works at your 4-way when using the circuit tester like # PTW2993 for each function, before you connect your trailer, then the issue is most likely a ground connection on your trailer. You will want to make sure you have a bare metal to metal connection free of corrosion, rust, or debris. You may want to check your trailer lights as well as sometimes they have a separate ground connection. If there is not function on the 4-way on your vehicle, then I recommend you check...
    view full answer...

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Rachael H
Expert Research:
Rachael H
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

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