1. Custom Fit Vehicle Wiring
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  5. 4 Flat
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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 # C55316
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Custom Fit Vehicle Wiring

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Curt 4 Flat Custom Fit Vehicle Wiring - C55316
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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. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C55316 or order online at etrailer.com. 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.
  • All Info
  • Reviews (19)
  • Q & A (15)
  • Photos
  • Why etrailer?

Curt Custom Fit Vehicle Wiring - C55316

  • Custom Fit
  • Trailer Hitch Wiring
  • Curt
  • 4 Flat
  • No Converter

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.


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)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points behind rear bumper
    • Plug in T-connector
  • Comes with dust cap for 4-way flat connector
  • Limited 1-year warranty


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the rear bumper, along the driver's-side frame rail.


Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


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.



55316 CURT T-Connector - 4 Wire

Installation Details C55316 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C55316

Average Customer Rating:  4.9 out of 5 stars   (19 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.

- C55316
by:
1995 Ford F-350 Super Duty

Very easy plug-n-play harness. Hooked it up to my 4 pole to 4-7 pole adapter on my 95 F-350. Highly recommend for the price and quality 355846



- C55316
by:
1988 Ford F-150, F-250, F-350

Works as advertised , fast shipping from Etrailer . 897391



- C55316
by:

Awesome awesome awesome. Etrailer is always on point and delivers excellent value. I wouldn't think of shopping anywhere else. 894006



- C55316
by:

866181



- C55316
by:
Ford F-250 Super Duty

Easy Peasy! Perfect fitment on my 1990 F250 XLT Lariat. 652218


Comments
Still trucking! The harness kit is doing great, even in hot AZ.
Mark - 06/04/2020

78676

- C55316
by:

great stuff 639170



- C55316
by:
Ford

I like this for my older Ford trucks it makes wiring in new trailer connectors a breeze 601334



- C55316
by:

Work exactly as described. Very happy with my purchase. Will purchase again in the future!! 584076



- C55316
by:

Fit perfectly.... works great 581144



- C55316
by:

Exact fit, a snap to install. 577430



- C55316
by:
1994 Ford F-250 and F-350

Amazing product very easy to install. I received my package very quickly as well. Amazing company to do business with. 566284



- C55316
by:

Plugged connectors in checked ground .Plugged trailer in, all lights working.I didn't know these were available .Would have saved me a lot of splicing wire in the past. 476942



- C55316
by:
1988 Ford F-150, F-250, F-350

The product plugged right in and my trailer lights worked perfectly, great product for the price. 476762



- C55316
by:

A snap (literally) to install. Found the OEM lighting plug by the right side rear bumper. Disconnected the plug and plugged the trailer wiring harness between them. Hooked the trailer and everything worked 455655


Comments
Doesnt get a lot of use but still works great.
Hollis - 11/29/2018

46176

- C55316
by:
1989 Ford F-150, F-250, F-350

A++++ all the way on the item's and on the service! I highly recommend etrailer.com !! 338110


Comments
perfect
Kenneth c - 02/02/2018

34160

- C55316
by:
1992 Ford F-150

I purchased an older 92f150 and the trailer wiring harness that was on the truck was broke and did not work, i attempted to re-wire it but still no luck, i jumped online to e-trailer and sure enough they had this harness that you just plug in and good to go, bought it and sure enough it just plugs tight in to the tailight harness and i was done, easy and i have purchased items before from e-trailer, These guys are fantastic at customer service, i will buy from them until i die lol 257901



- C55316
by:
1989 Ford F-150, F-250, F-350

This product was easy to hook up and works great 234585



- C55316
by:

Excellent construction, good heavy wire used. My only criticism is that they used white wires instead of matching the factory colors. Not a major problem when just plugging in and using, but I am going to separate mine and use as a replacement plug for my truck bed. This is the cheapest source of both male/female connectors I could find. 115574



- C55316
by:

I was pleased with way product installed it was great! you are great people to buy from thanks 92373


Comments
A great product still working great thanks for asking.
john t - 02/01/2015

9176
19
19

Ask the Experts about this Curt Custom Fit Vehicle Wiring

  • Recommended 7-Way Wiring Connector for 1996 Ford F-250 XL With Factory Plug At Rear
    On your 1996 Ford F-250 XL with factory trailer connector I recommend the 4-way # 118316 for a 4-way and then if you want a 7-way use # 37185 and connect to the factory wiring on the driver's side frame rail. If you already had the factory 7-way then you can just use replacement # HM40950. We don't have the custom replacement part you are seeking.
    view full answer...
  • 4-Way Trailer Wiring Recommendation for 1991 Ford F-150
    The easy way to install a 4-way trailer wiring harness on your 1991 Ford F-150 is with the part # C55316 which will plug in line with your taillight wiring harness. Otherwise you'd have to use a circuit tester like part # PTW2993 to test the wires of your taillight harness and wire them accordingly to the 4-way. The 4-way wiring colors are: White is ground, yellow is left turn/stop, green is right turn/stop, and brown is running light.
    view full answer...
  • Installing New Trailer Connector to Use Trailer Brake Controller on 1994 Ford F-250
    The Curt T-Connector 4-Pole harness you referenced, # C55316, is a correct fit for your 1994 Ford F-250 and plugs in to a factory connector at the rear bumper to provide basic lighting functions for your trailer. If your truck does not have a factory 7-way trailer connector you will need to have this working 4-pole connector in place to install one for use with a brake controller. You will also need a trailer brake controller, such as the reliable and popular Prodigy P2 # 90885, as well...
    view full answer...
  • Brake Controller and Trailer Wiring for 1997 Ford F-350 Utility Body Without Factory Wiring
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55316 is what you need if there is a factory connection near the rear bumper like pictured on the driver's side. If it is there, then you will use the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7. If that connector isn't present, then I recommend using the 7-Way Pre-Wired Car Connector, 7' Lead # 20023 to get to the wires you mentioned and the...
    view full answer...
  • Trailer Wiring Harness for a 1988 Ford F-150
    We have 2 wiring harnesses for your 1988 Ford F-150; # C55316 and # 118316. They both install the same way; by plugging in line with the tail light wiring under the truck. I have linked a video showing how the 118316 installs.
    view full answer...
  • Trailer Hitch Recommendation for 1989 Ford F-250
    For your 1989 Ford F-250 the Curt hitch part # 14001 is a confirmed fit and would work well for towing a trailer. You will need to start with a 4-way (if you do not have one). For that you would want the # C55316. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed...
    view full answer...
  • Availability of 4-Way Trailer Wiring Harness Recommendation for 1997 Ford Super Duty Van
    It sounds like you are looking for a 4-way like the Curt part # C55316 which is a confirmed fit for your 1997 Ford Super Duty and has the style of connector you mentioned. Round connector but pins arranged in a square-like pattern. Check out the picture I attached for more info. If this is not what you need send me a picture of what you have and I'll take a look.
    view full answer...
  • How to Convert a 4-way to a 5-way and Make it Functional
    The 4-way of the # C55316 that you referenced will plug into a 5-way like what you have on your trailer, but if you need the fifth circuit for like a reverse lock out solenoid you would also need the adapter # 20036. This product will let you run the fifth circuit anywhere you need. For a reverse lockout it would get run to the reverse light circuit. Check out the install video I attached for more info.
    view full answer...
  • Recommended Trailer Hitch Receiver For Deep Drop Bumper On 1990 Ford F250 XLT Lariat
    The B&W Heavy-Duty Trailer Hitch Receiver - Custom Fit - Class V - 2" # BWHDRH25198. This is a heavy duty hitch that measures 7-3/8 inches from the frame to the top of the receiver. As long has his deep drop bumper fits with the 7-3/8 inch from frame to top of the receiver measurement, this hitch is confirmed to fit his 1990 Ford F-250 XLT Lariat Diesel. The spare tire may need to be repositioned or modified for this hitch. If you don't want to worry about repositioning the spare,...
    view full answer...
  • Replacement 7-Way Socket for 1997 Ford F-350 That Has Two Separate Vehicle Connectors
    Thank you for providing a photo of the wiring harness you need for your 1997 Ford F-350 heavy-duty diesel truck. These two plugs are a different configuration than the plugs on the 4-pole harnesses we offer, such as Curt # C55316 and Tow Ready # 118316. The 7-pole harness with the two-plugs on the vehicle side is not available as an aftermarket item; you will need to visit your Ford dealer for an OEM replacement. For reference I have linked a page showing all accessory items for your...
    view full answer...
  • Trailer Wiring Recommendation for a 1993 Ford F-150
    We do offer a few options for a 4-way flat wiring harness that will match the plug on your 1993 Ford F-150. The options are the Tow-Ready # 118316 or the Curt # C55316. I have provided linkes to either of these options for you. If you need to install a fully functional 7-way then you can use the # ETBC7. I have included a helpful article and a couple of videos for your reference.
    view full answer...
  • Which Trailer Wiring Harness do I Need for a 1992 Ford F-350
    The Curt Custom Wiring Adapter # C51312 is correct for you 1992 Ford F-350 if your truck has the factory installed tow package. If it does not, then you will need the Curt Universal Wiring Adapter # C51515. You will also need the Universal Installation Kit for Trailer Brake Controller - 7-Way and 4-Way Flat # ETBC7 and the Curt T-Connector Wiring Harness with 4-Pole Flat Connector # C55316 if you do not have the tow package. I have included video reviews of each wiring adapter for...
    view full answer...
  • Class III Hitch Receiver Recommendation for 1987 Ford F-150 with 37-1/4 Inch Frame
    I do have a Class III hitch that fits your 1987 Ford F-150 with a 37-1/4 inch frame, however, it's not a Curt. Take a look at the Draw-Tite Max-Frame Trailer Hitch Receiver Class III # 75038. This hitch receiver has a towing capacity of 5,000 lbs and a tongue weight rating of 500 lbs, which is more in line with the towing capacity of your F-150. It also features a concealed crosstube design, just like the Curt # 14001. That being said, Draw-Tite hitches are not manufactured in the USA. If...
    view full answer...
  • Highest Rated Weight Capacity Hitch for 1993 Ford F-150 Flareside
    I can help you find the highest rated weight capacity hitch for the 1993 Ford F-150 Flareside. The F-150 of that year had two bumper styles, standard step bumper or deep drop bumper. Most likely the Ford Flareside has a standard step bumper. For the standard bumper, I recommend Curt Class V receiver part # C15300. The Curt hitch fits standard bumpers and offers up to 16,000 lbs of towing capacity. It is a custom fit trailer hitch does require some drilling of the frame. There are not...
    view full answer...
  • Parts Needed to Install Curt Venturer Trailer Brake Controller C51110 in 1995 Ford F-150
    We can help you with installing a trailer brake controller like the Curt Venturer time-delay controller # C51110 in your 1995 Ford F-150 to operate the brakes on your Hornet trailer. The parts you need depend on how the truck is equipped. If the truck has a factory 4-pole trailer connector you will use harness # C51322 to connect the controller and part # 37185 to provide the 7-way. If the truck has a factory 7-way then all you need is the controller and the harness # C51322. If...
    view full answer...




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Info for this part was:

Edited by:
Leah B
Written by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Updated by:
Sarah W
Updated by:
Kristina F
Updated by:
Isabelle B

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