bing tracking image
  1. Trailer Wiring
  2. Hopkins
  3. Trailer Connectors
  4. Trailer End Connector
  5. 4 Flat
  6. Plug and Lead
Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48"

Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48"

Item # HM38134
Our Price: $23.11
Trailer Wiring
Shipping Weight: 0.35 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Easily disconnect this 4-way flat trailer-end plug from your vehicle without damaging the terminals. Large grip ring provides maximum leverage when disconnecting. Harness splices into your trailer's wiring. Durable cable covering resists damage. Great Prices for the best trailer wiring from Hopkins. Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48" part number HM38134 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (114)
  • Q & A (0)
  • Photos

Hopkins Trailer Wiring - HM38134

  • Trailer Connectors
  • Trailer End Connector
  • 4 Flat
  • Plug and Lead
  • 0 - 5 Feet Long
  • Hopkins

Easily disconnect this 4-way flat trailer-end plug from your vehicle without damaging the terminals. Large grip ring provides maximum leverage when disconnecting. Harness splices into your trailer's wiring. Durable cable covering resists damage.


Features:

  • 4-Way flat trailer-end connector plugs into the 4-way flat on your vehicle
  • Easy-to-pull ring makes 4-way easy to disconnect
    • Ring handle makes it easy to pull connector straight back for proper leverage
      • No wiggling plugs or damaging terminals
    • Wide handle makes it easy to grip connector
  • Protective cable sleeving is durable and insulated
  • Simple installation - hardwire to existing trailer wiring
  • Corrosion-resistant terminals are long-lasting


Specs:

  • Ring inner diameter: 1"
  • Ring outer diameter: 1-7/8"
  • Wiring harness length: 48"
  • Wire configuration:
    • White: ground wire
    • Yellow: left turn/brake light
    • Green: right turn/brake light
    • Brown: tail lights
  • 3-Year limited warranty


Easy-Pull Ring Handle Is Easy to Grip and Pull

Easy Pull

Standard 4-way flat plugs have a small surface area to grip when you are pulling them apart, forcing you to wriggle the plugs back and forth to loosen them. Some users even pull on the wires. This can lead to broken terminals or ripped wiring. With the Easy-Pull harness, the plug has a large grip ring designed to make disconnecting a snap. Simply slide your finger into the ring and pull the plug away from the opposite plug to disconnect.


Easy Pull Rings

The Easy-Pull is also available as a vehicle-end 4-way flat plug. Combine the Easy-Pull trailer-end plug and vehicle-end plug for the easiest possible disconnection. With ring handles on both connectors, disconnecting is as simple as gripping the rings and pulling straight apart. No wriggling, no broken terminals, and no damaged wires.



38134 Hopkins Easy Pull 4-Pole Flat Trailer Wire Harness with Jacketed Cable - Trailer Side - 4' Long




California residents: click here


Customer Satisfaction Score:


Customer Reviews

Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48" - HM38134

Average Customer Rating:  4.7 out of 5 stars   (114 Customer Reviews)

Easily disconnect this 4-way flat trailer-end plug from your vehicle without damaging the terminals. Large grip ring provides maximum leverage when disconnecting. Harness splices into your trailer's wiring. Durable cable covering resists damage.

by: 04/01/2024

Love this connector! I have rheumatoid arthritis so my hands aren't as strong as I'd like and I have trouble with regular 4-flat connectors. I can get a good grip through the pull loop on this and get the leverage I need to take connect and disconnect.



by:

Perfect for my utility trailers with a 4 pole plug.



by:

The parking lights did not work after installation. Tested with multimeter found a short in the brown wire. A cheap product would not recommend.

Etrailer Expert

Brooke M.

9/25/2023

I will have our customer service team reach out to you about this. Thanks for letting us know!



by:

The harness connected well with the other components and the plug mates easily when hooking up the trailer with the tow vehicle.



by:

Great product, hope it last a long time, the old wires were getting a bit worn out. I really like the loop to make it easier to unplug without putting too much strain on the connector.

Andrew

5/22/2023

It did well for a while, but within a few months, the pins began bending from just the weight of the small flap on my Ram pickup that covers the 4-pin connector. I switched to using a big 7-pin to 4-pin adapter and it lasted a couple more years. This weekend, it finally gave up the ghost and one of the pins came off in the adapter. I was able to fish it out and wired up an old plug I had stashed away just in case. Im trying to decide if I should buy another, but am not too sure I want to spend so much for something that will need to be replaced as often as a $2 plug!



by:

Really like the heavier construction jacket and pull ring since it will be installed on a snowmobile trailer.



by:

Exactly what I wanted! Fast delievery!



by:

Absolute hot garbage. Arrived defective and never worked. A complete waste of money. If i could give zero stars i would. For $20 for a 4 pin plug you would think they test them before shipping.

Etrailer Expert

Jenny N.

4/29/2023

Goodness me! This 4 pin connector does have a 3 year warranty. I will have our Customer Service team reach out to you.



by:

The wiring was just what I needed and the shipping was quick. I will definitely be using etrailer more in the future.



by:

The Hopkins 4 way trailer wire connector is very well designed and manufactured. It is enough of an improvement over a standard connector that I recommend replacement of an undamaged standard connector.



by:

Allows for easy insertion and removal without pulling on harness. Works great!



by:

So much easier to use with the large pull handle. Great for use when your Trucks harness is in a tough to reach place

Michael

5/30/2022

Still a great harness. Very durable

Norwood

8/1/2022

excellent



by:

This is a great product, solid and great quality. Three things that would help the consumer. First thing would be to add solder-less connectors. Next thing would be to have about 6-8” of exposed wire to work with when coupling. And last thing would be to furnish a dust cover for the plug end.

Ted

9/14/2020

I couldn’t be any more happy. It has held up to many fishing trips on my boat trailer, great!



by:

Nice solid, molded grab handle. I’m switching all my 4 wire trailers over to these harness. Well made

Ray C.

7/16/2021

Have not had one issue in the year since I installed them. A+. Worth the extra cost



by:

This is a great solution to a 4 wire plug for my trailer! Regular 4 wire plugs tend to fatigue over time. This rugged design is sure to last many years



by:

Not as durable as I thought it would be. I like the open hole design for easy plugging and removing, but the connection pins to the assembly themselves are subpar. I have a folding tongue and secured this onto a holder, when closing the arm, it folded the pins downward. After realizing the interference, i moved it to an upward position to allow for clearance but the damage was done. The pins bent and are now loose. Had to replace the entire harness.



by:

This connector is much more robust than standard flat pigtails. I particularly like the sheathed cable rather than the exposed flat four-wire.

Kenneth

9/24/2021

Working perfectly. The hole pull works far better than yanking on the wire leads when disconnecting



by:

Part as described and will meet my needs



by:

Love the finger loop. Next time I need to replace my trailer light plug this will be my choice.

Kenneth

9/6/2019

Excellently. Love the ring!



by:

Exactly what I wanted. Excellent quality. Couldn’t find it anywhere. Etrailer had it !

Reese

8/7/2022

Still working as new.



by:

A real upgrade to typical 4 wire trailer connectors. If you are doing any trailer wiring I strongly recommend this replacement.

Well made with an integrated cover like a outdoor extension cable the ring makes it easy to hold when inserting or removing the connection from your vehicle.

It would be perfect if it came with the very fine cover that Hopkins includes with most other variations of the "ring" style connector.



by:

very heavy duty trailer pigtail cable. This is what I need to prevent kinks and breaks in the wiring harness. Nothing like hooking up trailer lights that dont work because the wiring is easily damaged.



by:

exactly as pictured, quick delivery



by:

Heavy Duty Trailer plug for my boat trailer! Fast shipping!
Thanks



by:

Well made unit that makes it easier to connect and remove from tow vehicle. Lead is 48" long but would be better if a little longer, maybe 60 or 72" to facilitate connection to tow vehicles with extended hitches or trailers with long tongues. Would be fantastic if the monitor/test lights were included on connector.


25
114
Show More Reviews

See what our Experts say about this Hopkins Trailer Wiring

  • How To Reapair Damaged 4 Prong Trailer Connector on Karavan Trailer
    It sounds like you're referring to the trailer connector on the trailer and in which case it would be pretty easy to replace but there's no repairing it really. For replacement, I recommend upgrading to the Hopkins Endurance Easy-Pull Harness part # HM38134 which is much easier to unplug than the original design. In order to install it just cut the wires from the old connector a few feet back and splice on the new wires color for color using butt connectors like the Heat Shink Butt Connectors...
    view full answer...
  • Recommended 5-Way Adapter for Vehicle 4-Way Trailer Connector Wiring Harness to Work With Trailer
    For your trailer with 5-way flat connector to connect to your vehicle 4-way flat, I recommend the Curt Trailer Connector Adapter - 4-Way Flat to 5-Way Flat - Vehicle End # C57187 or the Tow Ready # 20036. The blue wire will connect to your reverse light wire at your tail light utilizing the quick connect supplied with this adapter.
    view full answer...
    Image 1 for
  • Identifying 4-Way Trailer Wiring For Connecting To New Trailer Side Connnector
    The wires on your trailer sound abnormal for a typical trailer. I recommend either tracing each wire to determine what function it serves or using a battery to power the wiring. The Hopkins Endurance Easy-Pull Harness # HM38134 is one of the better connectors to use. It has the pull ring that will reduce the chance of damage to your wiring in the future. For the vehicle side your white wire is typically the ground, yellow left turn/brake, green right turn/brake and brown is the running...
    view full answer...
  • Trouble With Trailer Lights Flashing Off and On When 4-Way Connected
    It sounds like the problem is in the wiring on the 4-flat connection of the trailer. I recommend the Hopkins Endurance Easy-Pull Harness # HM38134 to replace the 4-way plug on your trailer. I'm guessing that there many be a connection issue at the 4-way or the ground wire inside the harness broke and this is what is causing your lights to flash. That is the last point and explains why your lights all work when you ran a dedicated ground wire to the battery. You can confirm that it is...
    view full answer...
  • License Plate Bracket Needed for 23x47 Carpod Walled Cargo Carrier
    We do have license plate brackets like part # LP10SB that you could use to move your license plate so it sits behind the 23x47 Carpod Walled Cargo Carrier # M2205-2201. If you plan on driving at night time you should make sure to have a bracket with a light like part # PM436B. If you go this route then you will also need a wiring harness like part # HM38134 (you will connect the wire from the light to the brown wire and then cap off the additional wires for this application). Butt connectors...
    view full answer...
  • Parts Needed For Adding A Lighted License Plate To The Back Of a Thule EasyFold XT Bike Rack
    To use the Thule License Plate Holder # TH35JV with the Thule EasyFold XT Bike Rack # TH903202 you will need to attach it to one of your bikes as the holder is designed to attach to either a vertical or horizontal bar. Since the Thule EasyFold XT Bike Rack # TH903202 already has holes for attaching a license plate you can simply attach your plate to the rear of the bike rack with the 2 screws provided. For a light if you are operating at night you can add the LED Light Bracket # OPT97FR...
    view full answer...
  • Matching 4-Way Recommendation to Fit the Hopkins # HM38134
    For the connector that will mate up to the Hopkins # HM38134 that you referenced that has the pull ring and the cover you are interested in you'd want the part # HM48044 for a 48 inch long version.
    view full answer...
  • Trailer Lights Come on With 2017 Hyundai Santa Fe Off With Curt Wiring Harness
    There are a myriad of reasons why your trailer lights would be on while your 2017 Hyundai Santa Fe's lights are off, and generally the issue is on the trailer side. So the first thing to do is take a look at your trailer's 4-way and check it for corrosion. A build-up of corrosion can cause numerous issues with the lighting signals, so if it is corroded then you will need to replace your trailer 4-way with the Hopkins 4-Pole Flat Connector # HM38134. Also, to ensure there is no corrosion...
    view full answer...
  • Do You Have a 4-Way Flat Trailer Connector Which Has 5 Wires For Connecting to Trailer Wiring?
    The only way we carry 4 flat trailer connectors which have 5 wires is on an entire trailer harness like the 20' # A20WB. This has the single yellow, green, and white wires with 2 brown wires. You can simply cut off the unneeded wiring and wire to your trailer wiring. You can still use a regular 4-Flat Connector # HM38134 and wire the 2 brown wires on your trailer to the single brown wire on the harness. This is an upgraded connector with easy pull connector and additional sheathing to protect...
    view full answer...
  • Solution for 4-Way Round Connector on Trailer to 4-Way Flat Connector on 2016 Honda Pilot
    I do have a solution for you but unfortunately there are no adapters for a round 4-Way connector on your trailer to the Curt T-Connector # C56291 on your 2016 Honda Pilot. Instead what you will need to do is swap out the 4-Way round connector on your trailer for a 4-Way flat connector. I recommend cutting the connector off and splicing the Hopkins Endurance Easy-Pull Harness # HM38134 on your trailer wiring so that you get a connector on your trailer that is compatible with your vehicle....
    view full answer...
  • How to Trouble Shoot Brake and Turn Signals Not Working On a Trailer
    This can be caused by a few things. First and foremost, you will need to check a couple fuses to make sure they are still in good condition. Under the hood of your 2018 Toyota Tundra, you will want to check the fuses in positions 6 and 37. Then you will need to check the cluster under the instrument panel for fuses 20 and 22. These can be confirmed in your owner's manual, but these are responsible for the towing lights. If one or more have blown, it will definitely cause the issue you are...
    view full answer...
  • Wiring for Thinline LED Trailer Taillight # A25W2GWB
    If you were goin to install the Thinline LED Trailer Taillight part # A25W2GWB on your trailer you would need to wire to a trailer side 4-way like the part # HM38134. On the 4-way the white is ground, green is right turn/stop, yellow is left turn/stop, and brown is taillight. On the LED light white is ground, black is taillight, and red is stop/turn.
    view full answer...
  • Troubleshooting Trailer Lights
    Yes it could be a bad ground, and it would not matter if the vehicle has LED lights and the trailer doesn't as that combo happens quite a bit. Check both your vehicle and trailer connectors for corrosion, which can be green or white in color. A build-up of corrosion can interfere with the signals getting through the connectors so if it is present you are going to need to replace the plug with # HM38134 for the trailer side. As for the grounds, make sure they are attached to bare metal surfaces...
    view full answer...
  • Can a Junction Box be Used for 4-Way Flat Trailer Connector
    You could technically use a junction box like part # 3375601101 for a 4-Way connection, like part # HM38134, but since junction boxes are designed for 7-Way connections you'll need to find a way to plug up the larger hole since you're only going to be running 4 wires through it instead of all 7. We do carry some different style 4-Way connectors like the Quick Fix # HMC20031 which make connecting the wiring a little quicker but I feel like this isn't as solid or secured of a connection...
    view full answer...
  • Trailer Lights Don't Work What to Check
    Thank you for your purchase directly from etrailer of your new trailer tail lights. There could be many different possible issues, so to determine the specific problem you will need a circuit tester to test the connector on your vehicle after disconnecting it from your trailer. Check the wiring going into your harness from your tail lights to see if those wires are carrying the correct signals, if not then the issue is with the vehicle wiring. If the signals going to your harness are okay,...
    view full answer...
  • Towing a Trailer with European Connector with a 2018 VW Passat
    The Curt wiring harness # C56388 is a standard 4-way connector that's commonly used in the United States. It powers the running, brake, and turn signals on a trailer. In order to connect your trailer with a European connector you'll need to replace the connector with a standard trailer side 4-way like part # HM38134. You'll need to determine which wires on the trailer are for each function and wire them into the new 4-way. On the 4-way the white wire needs to be grounded to a clean...
    view full answer...
    Image 1 for
  • Trailer Wiring Harness for Snowmobile Trailer
    We have numerous trailer wiring harnesses you can use for your snowmobile trailer, but none specifically for a Triton trailer. You just need to choose from if your trailer needs a 4-way or 7-way, and there are 7-ways with insulated cable which is great for a snowmobile trailer. - 4-Way: Hopkins Endurance Easy-Pull Harness # HM38134 - 7-Way: Bargman 7-Way, RV-Style Connector with Heavy Duty Insulated Cable - 6 Ft # 54006-057 or 8 Ft # 54006-058 I have added links below to some video reviews...
    view full answer...
  • What Size Wire Gauge Do 4 Pole Connectors Use
    The Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector # HM38134 you referenced has 18 gauge wires for the brown (taillight), green (right turn and brake), and yellow (left turn and brake) wires. The white (ground) is a 16 gauge wire. Typically 18 or 16 gauge wire is sufficient to run trailer lights, especially when you use LEDs since they draw much less power than incandescent bulbs. For similar trailer connector that has all 16 gauge wire the Wesbar 4-Pole Flat Connector w/...
    view full answer...
  • Can Roadmaster RM-910030-6 6-Pin Be Used to Replace 4-Pole Trailer Connector
    You could certainly do that if you wish, but if durability is what you're primarily concerned with, I'd use the # PK11609 die-cast socket along with the # RM-910030-8 plug, versus the plastic 6 pin plug provided with the # RM-910030-6 plug you'd looked at. The metal socket would withstand abuse better than the plastic socket. One thing to keep in mind, if you wire the vehicle and trailer this way, you'll have an issue if you ever try to to that trailer with another vehicle. You might...
    view full answer...
  • How To Replace 4-Way Trailer Connector on Karavan 5x8 Utility Trailer
    If the trailer has a 4-way flat connector then that means there are only three lighting circuits, left stop/turn, right stop/turn, and running lights. The left stop/turn is usually a yellow wire, the right stop/turn is usually green, and the running lights are usually brown. If you have multiples of any color at the connector then that just means the wires weren't combined mid-way and you would just need to do so at the connector. I recommend the Hopkins Endurance Easy-Pull Harness part...
    view full answer...
  • What to Check When There is No Power to the Right Side Blinker and Brake Light?
    The white wires will indeed need to be grounded. This should be done with both lights. If this does not get the lights working properly, you will need to use something like the # PTW2993 to test several things. First, you will need to check the plug on your vehicle to make sure all the ports are working properly. If you have a 7 Way connection, the 3 o'clock position will be the right turn signal and right brake signal. If there is no power, you will need to then check the wire on the...
    view full answer...
  • Availability of 7-Way Round to 4-Way Flat Adapter for a Light Plant Trailer
    If you have a 4-Way Flat connector on your light plant then the easiest way to connect it to the 7-Way on your tow vehicle would be with the Hopkins Adapter # 47345. We also have the Hopkins Adapter # 30955 which you could permanently install on your tow vehicle by simply disconnecting the US Car Connector from your current 7-Way and plugging it into the back of this adapter. This would give you both a 4-Way Flat and a 7-Way Blade connector so that you don't have to keep track of an adapter. If...
    view full answer...
    Image 1 for
  • Easy Way to Wire B&W Custom Headache Rack to Truck
    The B&W Custom Headache Rack with LED Lights # BWPUCP7500WA is designed so that the two innermost lights will serve as taillights while the two on the outside work as brake/turn lights. These lights are fed by bonded 4-pole wiring like what is typically found in a 4-pole wiring harness. Your easiest solution is going to be to install a 4-way on the end of the wiring harness that comes with the headache rack like the # HM38134 so that you can plug it into a 4-way installed inline with...
    view full answer...


< Previous



Do you have a question about this Trailer Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Adam E
Installed by:
Adam E
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video by:
Chris R
Employee Alexander C
Written 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.