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Hopkins Endurance 4-Way Flat Trailer Connector Socket - Vehicle End - Ergonomic Design

Hopkins Wiring

ratingratingratingratingrating (5 reviews)

Code:   HM48030


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Shipping Weight: 0.5 pounds


Hopkins Wiring - HM48030

This heavy-duty 4-way flat trailer connector socket mounts on the vehicle. A weatherproof, insulated lid covers the terminals and the large grip makes connecting the plugs quick and easy.


  • Easy pull, over-sized grip - makes connecting/disconnecting quick and easy
  • Heavy-duty housing with dust cover protects the terminals
    • Housing also has mounting holes to connect to brackets or bumper
  • Terminal grease packet included
  • 4-way flat socket (vehicle side)
  • Works with all 4-way flat connectors


  • Wires: 48" Long
  • Pigtail leads with ring terminal installed on ground wire
  • Wire Configuration:
    • Yellow - left turn and brake
    • Green - right turn and brake
    • Brown - tail
    • White - ground

48030 Hopkins Enurance 4-Wire Flat Trailer Connector - Vehicle Side

Customer Reviews

Hopkins Endurance 4-Way Flat Trailer Connector Socket - Vehicle End - Ergonomic Design - HM48030

Average Customer Rating:  ratingratingratingratingrating5.0 out of 5 stars   (5 Customer Reviews)

- HM48030

ratingratingratingratingrating by: Wayne W.02/24/2014

Is this review helpful?

Well made and delivered exactly as ordered. I used it in a custom wiring harness for a tow dolly. I wanted to provide a connection for magnetic based lights to place on the towed vehicle. It was perfect for my application.117500

- HM48030

ratingratingratingratingrating by: Danny W.07/25/2013

Is this review helpful?

Product was awesome. My last two connectors have corroded so bad within a year that I constantly was having to take a wire brush and clean off the pins to get good contact. I'm waiting to see what the environmental cap does to eliminate me having to do this. Also bought the vehicle side. Would highly recommend this to anybody with a trailer hook-up. Only thing I would suggest is to make sure anybody purchasing also buys the splices since none come with the product. All in all, a great buy. Thanks!91415


Using dielectric grease in the trailer connectors can also help reduce corrosion of the contacts.

Patrick B - 7/31/2013


- HM48030

ratingratingratingratingrating by: Edd V.11/04/2013

Is this review helpful?

Product was top quality. Exactly how it is described on the web site. fantastic company to deal with. Great prices and great service.106209

- HM48030

ratingratingratingratingrating by: D.R.06/25/2012

Is this review helpful?

Excellent products and service!!! 45528

- HM48030

ratingratingratingratingrating by: Barry S04/02/2012

Is this review helpful?

Heavy duty, quality with protective cap. Much better than OEM equipment.35909

Ask the Experts about this Hopkins Wiring
Expert Answers about Hopkins Endurance 4-Way Flat Trailer Connector Socket - Vehicle End - Ergonomic Design - HM48030                                           Do you have a question about this Wiring?

  • Preventing Damage to 4-Way Connectors on Trailers Used by Many People
  • There are a few solutions I can think of. First I will list some parts that you may find useful then explain some of the ideas I had. We offer a weather proof junction box, part # 38656, that would allow people to make hardwire connections without cutting your 4-pole connector off. We do not carry any heavy coated wire, but we do carry wire loom that might make cutting a bit more difficult like part # 459075-1. The best solution for preventing cutting I could think of is using flexible met
    view full answer...

  • No Tail Lights On Boat Trailer When Parking or Headlights of 1995 Ford Truck Are On
  • It sounds like you have a common ground problem. When the headlights are on, the highest amperage draw is placed on the wiring system and if you have a bad or loose ground, you will have problems with lights. You will want to inspect to make sure all the light assemblies have a good ground connection to a clean, rust and paint-free metal surface. You will also want to make sure the trailer and vehicle side connector have a good ground connection. I would recommend unbolting the ground connect
    view full answer...

Info for this part was:

Photos by:
Theodore B

Expert Research:
Michael L

Expert Research:
Reno H

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