Curt Manufacturing 56020 Vehicle-Side Custom 4-Pin Trailer Wiring Harness,Fits Select Ford

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Your Sales Price $58.95 - $36.65

A quick rundown of this product’s key features:

EASY TO INSTALL. No cutting! No splicing! This trailer wiring harness kit plugs into existing factory wiring on your vehicle and equips it with a standard, rear 4-pin trailer wiring connector for plugging in and towing a trailer
STANDARD CONNECTOR. This plug-in 4-flat trailer wiring can be used to connect trailer tail lights, brake signal lights and turn signals. 4-way trailer light wiring is popular on a variety of trailers, adding versatile towing options for your vehicle
VEHICLE-SPECIFIC. This aftermarket, vehicle-trailer wiring harness is designed for select years of the Ford E 150, E 250 and E 350 Super Duty
EASY GRIP. Plugging in your trailer wiring and trailer lights is easy with the ergonomic design of this vehicle socket. It features tabs on the top and bottom for a better grip when plugging into your trailer or unplugging
DUST COVER. To promote long-lasting use and weather resistance, this 4-pole trailer lighting wire harness comes with a rubber dust cover. It easily fits onto the 4-way flat connector when not in use, protecting it against the outdoor elements

Our Top Reviews

Reviewer: Carlos Carlo
Rating: 5.0 out of 5 stars
Title: Easy to install and have trailer lights
Review: Not too much to say about this other than it went in easy hooked up easy and works fantastic. One thing I think could be better is a little more detailed instruction and maybe color-coded step by step instruction be nice but not really necessary it’s definitely worth purchasing this kit and installing it in your van so you have trailer lights it’s pretty cool

Reviewer: GLENN HARRINGTON
Rating: 5.0 out of 5 stars
Title: Best yet!
Review: Easy instalation, works well

Reviewer: JH
Rating: 1.0 out of 5 stars
Title: Shorted out my tail lights.
Review: Shorted out my tail lights. Plugging this in as the products directed shorted out the fuse to my tail lights. Replaced the fuse and it blew immediately. Took this harness out of the system and the short went away. Probably got a faulty product.

Reviewer: Jared M Courage
Rating: 5.0 out of 5 stars
Title: Quick and easy
Review: No instructions, but YouTube is always on. Took all of 10 minutes to rig up.

Reviewer: JDeMattos
Rating: 4.0 out of 5 stars
Title: Hyperflash on left signal ONLY.
Review: Plug and play harness. Instructions are pretty vague but it’s not rocket science. They essentially “piggyback” off of the stock tail light bulbs. They should label right and left. Thankfully I tested before reinstalling everything and figured out I had it backwards.Right signal works as it should on my van and my trailer but left signal is blinking twice as fast or what’s known as “hyperflash”. All lights are operable so it sure why only one side is flashing faster than the other. Docked a star for that. Other than that, works as it should.

Reviewer: Kel
Rating: 5.0 out of 5 stars
Title: Worked great!
Review: This worked great for my 2008 e350 ford. The instructions didn’t work for my passenger model though. I had to follow a video from etrailer, this harness is almost the same as theirs but it doesn’t have the long wire for ground (so it’s much easier to install).

Reviewer: James M. Droddy
Rating: 5.0 out of 5 stars
Title: Perfect fit
Review: Fit perfectly. Just takes some time to install on the van since you have to run the wiring to both lights. However, works perfectly.

Reviewer: KL
Rating: 3.0 out of 5 stars
Title: Works but seems poorly planned
Review: We installed this in a 2014 E350. It works well enough and it IS worth it simply for the factory style plugs at each tail lamp. However, the right (green/white) side was too short (at least for how I chose to install it) and the left (yellow/brown) was inexplicably long – VERY long. I actually wound up splicing in about 2′ of green and white wire, so you might consider having some green and white primary wire on hand along with some butt connectors.Note the included instructions talk about slitting a grommet but I could not locate said grommet and it was not mentioned in the YT video, either. I was simply able to run through a hole where the taillight wires entered and down behind the plastic trim of the last pillar, then under the kick plate. The hole did not feel like it had any sharp edges and actually felt nicely finished.Now, from the kick plate I took advantage of 2 oval slits next to the door striker. I believe other reviewers have alluded to this as well. I put all 4 wires of this harness in plastic loom to protect them as they pass down through the body. Our vehicle had a tapped hole in this area as well that had a plastic thumb screw of sorts. I used a 3/8″ insulated rubber clip around my plastic loom and replaced the thumb screw with a standard M6x1.0 bolt, see pic. You will have to trim some rubber “grips” off the plug to get it thru the oval holes. These are just there for human finger comfort and serve no important purpose. From here I ran the plug under my hitch and again secured the wiring with an insulated rubber clip.

Reviewer: mike
Rating: 5.0 out of 5 stars
Title:
Review: Very simple plug and play ! Highly recommend

Reviewer: GERARD ARSENAULT
Rating: 5.0 out of 5 stars
Title:
Review: foul proof 15munute job

Reviewer: Amazon Customer
Rating: 5.0 out of 5 stars
Title:
Review: Straightforward to install and worked as expected.

Reviewer: Destructor
Rating: 4.0 out of 5 stars
Title:
Review: Easy install and they this harness works good. BUT! There is no marking for what side goes where to the left or right so I had to guess. And I guessed wrong! Then trying to unplug them the factory plug in my van broke because these fit so tight. (Not Curt’s fault) I love the wiring but I wish they clearly marked the left and right.

Price effective as of Apr 18, 2025 16:20:46 UTC

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