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

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

Part Number: HM38134
In Stock
$24.15
Trailer Wiring
Add to cart
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 (119)
  • 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   (119 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:

I guess when you don't even think about the product...you just use it...I guess the saying nothing means everthing..applys



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



by:

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



by:

Easy to splice the wires together and hook it up .



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:

Well thought out design.



by:

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



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:

Exactly what I wanted! Fast delievery!



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:

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:

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:

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:

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:

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:

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:

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



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:

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.



by:

I have purchased these ones before, for our fleet of trailers. Great quality cable and easy to plug in/out of vehicle. I stock a couple of these for repairs.


25
119
Show More Reviews

See what our Experts say about this Hopkins Trailer Wiring

  • 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...
  • 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...
  • How to Choose Correct Ball Mount for Towing a Trailer with a 2013 Subaru WRX and EcoHitch
    To choose the correct ball mount/hitch ball combo you simply need to measure the height of the top of the inside of your EcoHitch Invisi Trailer Hitch Receiver # 306-X7279 when it is installed on your 2013 Subaru WRX Sedan as well as from the ground to the bottom of your trailer coupler (while it is level!). You then just need a ball mount with a drop if the receiver is higher or a rise if the trailer coupler is higher. The ball mount kit # 989900 is a great option because it comes with...
    view full answer...
    Image 1 for
  • 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...
  • 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...
  • Installing a 4-Way on a Trailer that has a Green, a Yellow, a White, and 2 Brown Wires
    It sounds like you have the typical wire colors for your trailer (see attached picture). If that is the case then you will need to do exactly what you are talking about to install a 4-Way connector on your trailer like part # HM38134. The Brown wire should be the running lights which will need to be spliced together and then connected to the Brown wire on the 4-Way harness. You can verify that you are connecting everything correctly by verifying that the functions on the Tekonsha T-One...
    view full answer...
    Image 1 for
  • 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...
  • Hitch Recommendation for Highland Open Range 5th Wheel to Tow Enclosed Trailer
    I have a solution for you, but you'll need to take a few things into consideration to determine whether or not this will work for you. You could use a hitch like the Curt Adjustable Width Trailer Hitch Receiver for RVs # 13703 which is designed for trailer and RV frames 22"-72" wide and has a 3500-lb towing capacity. This hitch can be mounted on the frame of your Open Range 427BHS, however I would first consult with your trailer's owners manual to determine whether or not the frame is...
    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...
  • Recommendations For Adding Tail Lights To A Kuat NV 2.0 Bike Rack
    Though you will need to have a 4 Flat on your 2001 VW Eurovan, and for this I do recommend the Curt # C56175, adding lights to your Kuat NV 2.0 is definitely a good idea. I went through all our options for adding lights to a bike rack or cargo trailer, and the Curt Auxiliary LED Indicator Lights # C53201 will be the good option, but there is a potential issue. The base of the rack is not the same length on both sides and the arm the swings up and tightens down on the wheel will give you...
    view full answer...
  • Can 4-Way Flat be Used as Tow Bar Lighting Connector
    Sounds like you'd just need to wire in the part # HM38134 to the wiring on your vehicle in place of the 4-way round so that your 4-way wiring can attach directly to it. If this was not what you are looking for let me know more info on what you have so that I can check further. I'd need to know the connector at the rear of your tow vehicle, the connector at the front of your towed vehicle, and what connectors are present on your coiled adapter.
    view full answer...
  • Can the Hopkins Endurance Easy-Pull Harness Be Installed On Trailer With Two Brown Wires (Wishbone)
    The Hopkins Endurance Easy-Pull Harness part # HM38134 can indeed be installed on a trailer with a wishbone wiring harness. In order to do this you would simply combine the like circuits together, therefore you would combine the two brown wires for the running light circuit as well as the two white wires for the ground circuit as well if present. The only thing you'd really need is some butt connectors, part # DW05744-10.
    view full answer...
  • Troubleshooting Only Trailer Running Lights Working After Replacing 4-Way Trailer Connector
    There are a long list of possible issues that you could be experiencing with your utility trailer. First I recommend using a Test Light # PTW2993 to check for power on the wiring both at the vehicle and then after the 4-Way # HM38134. This will help you to ensure there is nothing wrong like a fuse on the vehicle and your new pigtail doesn't have an issue from the factory. You will want to continue to follow the trailer wiring down your trailer to determine where you lose power. If you have...
    view full answer...
  • Can Tail Lights be Installed on Kuat Sherpa 2.0
    Thank you for the purchase of the Kuat Sherpa 2.0 # SH22B. Since your right turn signal is being obscured you could very possibly use the Thinline LED Trailer Tail Light # STL59RB with a 4-Way pigtail like part # HM38134 but I have a different recommendation for you that I believe is a bit simpler to install and will look better since that strip can only carry one turn signal function. I recommend using the Light Kit # 20174 with 2 of the Bracket # BK70BB. The 4-Way connector is already...
    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...
  • How To Wire LED Trailer License Plate Light For Cargo Carrier To A 4 Way Flat
    I have a solution for you to hook up the Optronics LED Trailer License Plate Light w/ Bracket # LPL55CB to your 2021 Subaru Ascent without tapping into the wiring. You could install Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48" # HM38134 into the 4 way flat plug at the back of your vehicle which would provide you with 4 bare wires. You could then wire the white ground wire on the LED lights to the white wire on the Hopkins 4 way harness. Then...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Jack Wheel For A Reese Trailer Jack
    For your Reese 74410 Trailer Jack, you can use the Removable, 6" Poly Caster Assembly for etrailer or Ram Jacks # JWK-6P to replace your current wheel. This wheel has a maximum weight capacity of 1,000-1,200-lbs, has a diameter of 6" and a thickness of 2". We do not carry the Reese 8551700 connector you're after, however, the Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector # HM38134 will work just as good, and features an easy pull finger loop to make hooking and unhooking...
    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...
  • 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
  • How To Wire 4-Way Connector To Trailer With White, Yellow, Green, Yellow/Brown & Green Brown Wires
    It is very important to always test or trace each wire to determine their functions when changing connectors. This is necessary as you do not always know the manufacturer connected all the wiring correctly. On a 4-Way Pigtail # HM38134 the white is typically your ground with brown being for the running lights, green for the right turn/brake light and yellow for the left turn/brake light. Your trailer wiring is likely very similar with the white most likely being for the ground, green for...
    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...
  • Replacement Flexible Brake Line For a 1999 Four Winns Single Axle Boat Trailer With Removable Tongue
    Typically these types of trailers will use a flexible line like the Kodiak # bh-3mfs-1-5 inside the removable or folding tongue. You will need to measure the length of hose needed as this line is 18" overall with 3/16" fittings. Please let me know if you need a longer or shorter length or have different fitting sizes as I have no way to know what Four Winns put on your trailer. The same goes for the wiring harness. I need to know if the wiring goes to a junction box or if they use push...
    view full answer...
  • Right Turn Signal Does Not Work on Trailer
    There's a few options here, either a ground or bad wire, like you said, or the 4-way on your trailer has corroded. So start easy and check your trailer connector 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 trailer connector with a new 4-way, either # HM48133 or # HM38134. Then you can check and see if you have a damaged wire (though I doubt...
    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.


Product Experts Available Now!
Call 1-800-940-8924