Arrives before Christmas 
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Dealing with a wiring setup that’s just shy of connecting? The Hopkins 4-Pole Loop effortlessly extends your current 4-way flat connector by 12 inches. This compact solution provides the necessary length for stress-free hookups, ensuring you no longer face tight connections during your trailer setups.
Outdoor elements and constant usage can wreak havoc on wiring connections. With corrosion-resistant terminals, this product promises long-lasting durability and dependable performance. It’s a robust solution that keeps your connectors in pristine condition, even in challenging weather scenarios.
For those longing for simplicity in trailers and towing setups, this 4-pole loop is your answer. Its Plug and Lead design ensures straightforward extensions, accommodating various trailer configurations. Perfect for quick fixes and efficient setups when you need a little extra length without complex installations.
Switching between vehicle and trailer connections should be seamless. This product features dual-end connectivity, offering both car end and trailer end connections. It promises a hassle-free transition, making hook-ups straightforward regardless of the vehicle or trailer type.
Have limited space yet need efficient wiring solutions? The Hopkins 12-inch extension is designed for those tight spaces where a full-size wire is not feasible. It’s the perfect tool for organizing and extending your current setup without overwhelming your space, ensuring everything clicks into place comfortably.
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at the Hopkins 4-Pole Loop 12-inch long 4 Flat Connector, part number HM48145. Here you can see our loop installed. This is going to be ideal if you want to create a quick-connect situation for anything on your vehicle where you have to separate it at times by simply unplugging it and plugging it back in when you're ready to go back on. You can also use this as an extension harness for a 4-Pole Flat if you should desire if your plug is just a little bit too short. It's all in a weather-tight seal, rubber housing. It's going to help keep out corrosion and moisture. This will work for up to a 4-wire system.
If you only need to use 3 as we did in this case, you can just leave the other one blank, should you ever need it in the future. Now let's go ahead and show you how to install it. We'll take it and we'll just cut it in half. Then we can separate out our wires. We're only going to be using 3 of the wires on it so we'll go ahead and cut these wires flat at the end. I'm going to strip back about 3/4 of an inch or so, so we can twist these and fold them over since they are a thinner wire.
I'm going to shorten these back a little bit more. We don't need so much length. We're going to strip back our white wire, about 1/4 of an inch on these. Then we'll do our brown. Then well just use the yellow one that we're going to tie into our red.
The other 2 colors are going to match up to what we happen to be using on this vehicle. Now we'll be taking our red butt connector. It's an 18-22 gauge by Deka available at our website, part number 05730-5. We'll place them on our wire, grip it. We'll just give them a tug, make sure they're on there nice and tight. Then we're going to match up our colors.
This could differ depending on what you're mounting it to, your vehicle. I'm going to take some electrical tape, wrap up our harness, cover up our butt connectors to help keep moisture and corrosion and dirt out of the inside of our connectors. We'll push that down. We can go to the bottom side of our vehicle and finish our wiring. We're going to strip these back about 1/4 of an inch. We're only using 3 of them. We did not use the green on the other side so we won't be using it on this side. Install our butt connectors onto our wires. Now that we have all of those on there snugly, we're going to take our red wire that we stripped back about a half an inch. We'll fold this one over. We're going to put that to the yellow that we ran on the other side that was attached to our red wire. Then we'll crimp that. Then we're going to tie into our brown wire here. That's going to be for our tail lights. We're just going to cut this one here coming out of this harness and strip it back. We'll take those 2 pieces of the brown wire that we stripped back, twist them together. We'll insert that into the brown wire from our plug, crimp it, give it a tug. Then we just need to tie into our ground wire, which is going to be right here. We'll do the same thing. We'll twist those together, we'll crimp that to the white wire from our plug. Now we're ready to plug in our wire to our quick-connect. Just match it up, snap it together, and we'll tie up all of our wires and clean up our install. Now we're going to take some electrical tape before we zip-tie everything up. We'll just cover up all of our butt connectors to help seal out any moisture or dirt that can get into our wiring and help prevent corrosion. Then we'll take some zip ties. We'll tie everything up and we'll trim off our excess. That's going to do it for our look at the Hopkins 4-Pole Loop 12-inch long Connector, part number HM48145.
Just the right amount of extra harness to ensure the right amount of slack when using my drop hitch. Connects perfectly to my four-pin connector on the truck and trailer.
Exactly what I needed to wire my 2022 Forester. Excellent customer service to boot! Overall this was a great buying experience.
Perfect product for my needs. My 4 pin is hiding under a cover on my bumper, so I used this device to plug into the vehicles 4 pin and allow the extension to hang below the bumper. Now I can quickly plug in to the adapter without taking a panel off. Cheap easy fix for a great deal of convenience!
Exactly as described and works perfectly. Was rapidly shipped and delivered.
I had purchased a Pro Series Cargo Carrier 63153 and the 20174 light kit. Assembly was very straight forward but I found that the 4-pole connector harness was too short. This 12" extension was perfect. Also, Jonathon at etrailer provided excellent customer support getting it to me while on a trip.
Standard wire harness.
Great product... works as intended...
I used to extend the factory hidden hitch 4 pin plug out from under the bumper.
Pic attached as used on my 2015 Dodge Charger SXT Rallye AWD with factory hitch.
Product was exactly what I needed. It was a few days later than originally planned but no problem. I ordered a hitch cap but when I received it the electrical connection was just a bit short. This fixed the problem.
Perfect for our needs
No problems
Perfect product for my needs. My 4 pin is hiding under a cover on my bumper, so I used this device to plug into the vehicles 4 pin and allow the extension to hang below the bumper. Now I can quickly plug in to the adapter without taking a panel off. Cheap easy fix for a great deal of convenience!
Etrailer always has the hard to find products. It’s the only website I go to for trailer accessories. Fast and efficient delivery.
Looks to be well made and should do the job. A little longer, eg 18", might be useful.
Jim
9/12/2024
The extension wire continues to do the job everytime.
this worked good, use it all the time great price
The Hopkins 12" 4-flat connector extension and the Hopkins mounting bracket are top quality and will allow me to extend my truck's factory trailer wiring connector to the mounting bracket for a professional looking install. The mounting bracket will allow a much easier disconnect of trailer from truck.
The quick response from the etrailer Team is remarkable and I look forward to additional business with them.
Works as advertised. The only improvement that is needed is my plug adapter was a five pin, so there is an empty space when using my four pin extension to my trailer. I had to tape over this to avoid corrosion on the adapter plug. Maybe a "fix" could be made in the future with a "dummy" 5th pin to plug into the adapter?
I've got a 2015 Ram 1500 that I had ordered a lighted hitch cover for ... The harness on the cover was too short ... I used this for an extension and it worked great ... I received it two days earlier than expected ... Ordering was easy ... Thanks ...
Used to connect wiring to back of topper shell external led directional/brake lights on towed pickup. Acts as a quick disconnect if need to remove topper shell. works perfect.
Just want to say that etrailer has the best customer service people! Melissa worked with me to get me the correct part after I had ordered the wrong part, and shipped it to me complimentary. Both the new part and the wrong part were high quality and will solve my wiring problem. Thanks to etrailer for working with customers to make sure they get what they need!
Exactly what I needed to add a little more length to my trailer wiring.
I would also like to thank George and Carol at etrailer for their outstanding customer service and communication from the time I placed my order through the time I received my order. I have found it to be a real pleasure every time I have dealt with the kind folks at etrailer. These folks really know how to earn a customers repeat business.
Thank you,
Paul G
Perfect for trailer wires that are just short of connecting to some vehicles. Great if you need a little more play in wiring for turns.
Very satisfied with the product. It was very well made and solved my problem of rewiring my auxiliary brake light that was trailer hitch mounted.
Not too much to say about it...it just works! Made it possible to connect to the wire receptacle in the bumper step. Simple, cheap solution. Printed identification on individual wires is a nice touch. Seems like it would be fairly easy for the wires to separate from each other. But, a little electrical tape should take care of that, if needed. The connections fit well.
Works perfect to get a little extra length to trailer wiring harness.
Wiring extension is well made. This extension will keep me from having to get on my hands and knees to hook up the lights. That's good for us old guys! Fast shipping and good communication. I will be a repeat customer.
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Nicholas
3/20/2025
Still working great! Highly recomment both this company and the wiring harness. Easy installation and still works for my needs