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  1. Custom Fit Vehicle Wiring
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  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Converter
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 # HM43505
Our Price: $47.24
You Save: 33%
Custom Fit Vehicle Wiring

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Hopkins Custom Fit Custom Fit Vehicle Wiring - HM43505
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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 or splicing required. 1-800-496-5010 to order Hopkins custom fit vehicle wiring part number HM43505 or order online at Free expert support on all Hopkins products. Great prices 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 (38)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - HM43505

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Converter
  • Hopkins

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:
    • Stop/turn lights: 2.1 amps per circuit
  • 90-Day limited warranty


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

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.

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.

43505 Plug-in Simple Hopkins T-Connector with 4-Pole Trailer Connector

Installation Details HM43505 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - HM43505

Average Customer Rating:  4.9 out of 5 stars   (38 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.


I'm happy with Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
I look perfect in my 1995 Nissan pickup without cutting any wires 5 minutes perfect installation

1997 Nissan Pickup

Really glad I came across the eTrailer site on the web-- installing this item myself saved a bunch of money over having a dealer do it. The connectors fit perfectly into the existing wiring harness and the whole installation took about 10 minutes. Now my trailer lights work perfectly. Very pleased.

1995 Nissan Pickup

I installed this on a 1995 Nissan pick up I was concerned that I would have some issues being how the truck was 26 years old but it went together as smooth as silk Not the first issue thank you much


Great project easy to install and just what I need

1995 Nissan Pickup

Amazing!! Fit perfect!!

David L - 08/17/2022


Hook right up to my truck. Very simply and easy

1995 Nissan Pickup

Great product! Very easy to install.

1995 Nissan Pickup

Just what I needed and very quickly del ivery.


Installed this harness in my 1995 Nissan Pickup (XE-V6 4x4, D21 Hardbody) and it works like an absolute charm. I purchased the harness to replace the one I installed in 2004, of another brand, that since failed. The nicest thing about this harness is that it piggybacks into the Y-junction for the rear lights (under the passenger side of the truck near chassis-end), and the outlet is a standard 4-prong flat trailer plug. This adapter is a splice-free, plug-and-play install. I paired it with a Curt 57405 License Plate Light Plug Connector, which all plays very nicely together on this old pickup.


Plug and play. I needed to install a 4 pin plug without wanting to splice cut and splice wires. Could not have been any easier to install. One year from installation and no issues. Thanks !

1995 Nissan Pickup

Perfect fit for 95 Nissan pickup

1996 Nissan Pickup

This product arrived just as described, fit like a glove and functioned perfectly. E-trailer is my go-to for all my trailer and lighting needs as their prices are great, items are detailed well and customer service is top-notch. Highly recommend.

1994 Nissan Pickup

item is well made and was easy to install. You will need extra tie wraps to make a clean installation so extra wire doesn't hang down. After installation I plugged my utility trailer in and all lighting worked perfect.


Perfect fit looks factory and since it plugs into harness there is no splicing to corode or loosen over time. Very happy with this product.


Excellent product. It is plug and play. Simple to find correct plug and install. All trailer lights work as they're supposed to.

1997 Nissan Pickup

Exact fit. Works perfect. Quick and only way to go. Made specifically for the application. Delivery time was excessive BUT well worth the wait. Would buy it again

Used it today... still working perfectly well.
Dennis D - 03/21/2018


This is my second order with etrailer and again I am totally satisfied and impressed with the customer service and quality. Thanks!!!


Perfect fit and easy to install


Worked great on my 1994 Nissan XE pickup. One of those "15-minute" projects that actually only took 15 minutes to accomplish. So far, so good. Seems like quality components that will last.


Works flawlessly! Easy to install, great product

1994 Nissan Pickup

Great product. I will buy another one in the future


1986 Nissan Pickup

great service fast delivery and most important the right part

1992 Nissan Pickup


It fit perfectly You were a great help Thanks for your input

Show More Reviews

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

  • No Brake Light Function from Hopkins Tail Light Converter Kit HM48895
    The Hopkins 4-pole wiring harness made for your 1996 Nissan Pickup is kit # HM43505 which appears on the linked page along with similar items # 118353 from Tekonsha and # C55353 from Curt. All of these wiring kits use custom-fit plugs for simple installation at the truck's taillight connectors. No splicing is required for these custom kits. The Hopkins hardwired harness # HM48895 is made for newer vehicles that use LED lights. This item has a red wire that splices to a vehicle's brake...
    view full answer...

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