Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 33355

lowest price pledge


Our Price: $42.73

You Save: 37%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $99 qualify for Free Shipping

Shipping Weight: 0.69 lbs

In Stock
Hopkins Powered Converter Custom Fit Vehicle Wiring - 33355
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Hopkins
  • Powered 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 or splicing required. Call 800-298-8924 to order Hopkins custom fit vehicle wiring part number 33355 or order online at etrailer.com. Free expert support on all Hopkins products. Guaranteed Lowest Price and Fastest Shipping for Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.

  • All Info
  • Reviews (4)
  • Q & A (6)
  • Videos (1)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - 33355

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 or splicing required.


  • 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
    • Locate connection points behind rear bumper
    • Plug in connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • Protective connection terminals resist corrosion
  • Comes with dust cap for 4-way flat connector, cable ties, and terminal grease packet for electrical connections


  • Maximum amperage:
    • Turn lights: 2.1 amps per circuit
  • Wire gauge: 16
  • 90-Day limited warranty


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

Once installation is complete, the 4-way flat 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.

Tail Light Converter

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.

43355 Plug-in Simple Hopkins T-Connector with 4-Pole Trailer Connector

33355 Installation InstructionsInstallation Details 33355 Installation instructions

This Product Fits The Following Vehicles

1993 - 1998 Toyota T100 Pickup

2005 - 2007 Toyota Tacoma

2008 - 2008 Toyota Tacoma without factory trailer connector

California residents: click here

Video of Hopkins Plug-In Simple 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 Hopkins Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 33355 Review

Today we're going to review part number 33355. This is the Hopkins Plug and Tow Vehicle Wiring Harness with the four way flat trailer connector. This is a custom fit part. It is designed to fit the 1993 - 1998 Toyota T100 pickups and also the Toyota Tacoma starting in 2005. Now because it's a custom fit part, I always like to recommend to go to our website, use our fifth guide .. put in your year, model, make vehicle and it'll tell you if this will work for your application. Now each vehicle's specific connector right here is pre-wired.

Uses original OEM connectors to give you a water tight protection. Guaranteed fit and a nice look. There is not cutting or taping of the wires. They use a sixteen gauge wire. The four way trailer connector right here includes this nice handy dust cap.

So when your not connected to a trailer, you can just put your dust cap over your four way just like that. And when you do that it will protect those terminals from any damage or from the elements themselves. They do include some easy to follow instructions. And each kit will include everything you need to complete a full wire flat installation. They even give you some dielectric grease to be able to put on all your electrical connections to keep any corrosion from appearing. And they give you a couple of cable ties that take up any slack in the wiring.

The converter that this uses is a powered converter. Has circuit protection. Which is included in a weather proof, double molded design. And that circuit protection with guard the tow vehicle and the converter itself from any shorts in the trailer. The maximum amperage load on this harness is 2.1 amps on the left turn and 2.1 amps on the right turn. The basic way you go to install this is you go to the back of the vehicle and underneath the rear bumper on each side .. you'll find some connectors that these will connect into.

And if you'll notice, a good idea is the yellow wire is for the driver's side and in this case they actually put labels on the connectors to help you out. But a good thing to remember is the yellow is for the driver's side. So you just connect these to the two connectors on that side. Passenger side again is labeled. But the good thing to remember is the green wire is the passenger side. So you make your connections there. And then what you want to do is use these cable ties to attach your converter down so it doesn't bounce around. Run your length of wire out the back to be able to connect to your trailer. And as I said anytime you make your electrical connections you probably want to put a little dielectric grease on them to help prevent any corrosion. But that should do it for the review on party number 33355 the Hopkins Plug and Tow Vehicle Wiring Harness with the four way flat trailer connector.

Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 33355

Average Customer Rating:  4.5 out of 5 stars   (4 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 or splicing required.

- 33355
2008 Toyota Tacoma

Really easy to install. Just one thing... All of the wires in the harness are well wrapped and protected except one green wire that runs the full width of the vehicle. I went to NAPA and got some spiral wrap to protect it. Other than that, it works great. Took me 30 minutes to install, not counting the spiral wrap. 291980

- 33355
2006 Toyota Tacoma

I just installed on my truck, it took me about 20 minutes. very professional product. looks like factory install minus the wiring loom, however it does have fiber wrap where it matters which is an important detail. now I don't have to worry about shorts in my wiring since you don't have to slice and splice, which ain't so nice. My only regret is that I didn't include in my order a mounting bracket which is $3-$5 which would have really buttoned up the project nicely. (this should be a suggested purchase when ordering these kits). As far as e-trailer... I got the product FAST! No Damage! Everything included! 2THUMBS UP. The only improvement I could suggest is 4 more zip ties included. you wouldn't need anything else. 392149

- 33355

Sold truck 694844

- 33355
2007 Toyota Tacoma

Delivery was timely and product was the correct item ordered. I appreciated the easily accessed shipping status. I have not installed the wiring harness yet, but anticipate it will fit as stated. Ill keep you informed. Thanks for the great service and competitive pricing. Bob 405882


Ask the Experts about this Hopkins Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?

  • Does Hopkins Trailer Wiring Harness 33355 Fit a 2016 Toyota Tacoma
  • I have a trailer wiring solution for your 2016 Toyota Tacoma, but the Hopkins no longer is listed for Tacomas newer than 2008. You instead would want the Curt harness part # C56282.
    view full answer...

  • Upgrading Toyota Tacoma from 4-way Flat to 7-way Round Trailer Connector
  • Sounds like you are looking for a 7-way for a brake controller and a 12v hot lead for your 2008 Toyota Tacoma, so I would recommend the Universal Installation Kit for Trailer Brake Controller, part # ETBC7. This includes everything needed to install the wiring for the 7-way connector, once you have the 4-Way installed. I have included a couple of videos of part # ETBC7 for you to check out. Although we offer many different brake controllers, I would recommend a proportional-type controller...
    view full answer...

  • Trailer Wiring Harness for a 2016 Toyota Tacoma SR5
  • The trailer wiring harness options for the 2016 Toyota Tacoma right now are all hardwire installations, since the truck is still a very new model, so that excludes # 33355. But you can use the ZCI harness # 119250KIT to avoid having to cut and splice into the vehicle tail light wiring.
    view full answer...

  • What Would I Need to Wire a Prodigy Brake Controller # 90185 to my 2005 Toyota Tacoma Prerunner
  • The connector you found could be the brake controller wiring harness If your 2005 Toyota Tacoma Prerunner has the factory tow package. If so, then you will have to use the Toyota connector that should have came in your vehicles glove box to connect from your Prodigy Brake Controller - Proportional, part # 90185, to your 2005 Toyota Tacoma Prerunner. If you are missing this connector you will need to go to a Toyota dealership to track one down. I would also recommend having them look at...
    view full answer...

  • Wiring Adapter for Boat Trailer With 5 Flat Plug
  • There is a solution for you to use both your 4-way and 5-way connectors on your 2007 Toyota Tacoma though it is not a quick plug-in option. Instead, you would need to use the Tow Ready 4 Pole to 5 Pole Trailer Wiring Adapter # 20036 which will change the 4 flat on your Tacoma to a 5 flat, though you would still be able to use the 4-way on your trailer by simply plugging it into the 5-way. I've added a link to a video review as well as a link to a video install for you to take a look at.
    view full answer...

  • Recommended Wiring Harness for 2008 Toyota Tacoma to Connect to Boat Trailer
  • It sounds like you are needing a 4-Way or 5-Way flat connector on your 2008 Toyota Tacoma to connect with your boat trailer. If you do not yet have any connector installed, I recommend the Hopkins Plug-In Simple Wiring Harness # 33355. This custom harness will plug into factory ports located behind the rear bumper (on the driver and passenger side). This will provide you with a 4-Way flat connector. If your boat trailer is equipped with a 5-Way connector, then you can simply add...
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?

  • Why etrailer.com?

    At etrailer.com we guarantee:

  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Updated by:
Sarah W
Updated by:
Alexander C

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!

Call 800-298-8924