Hopkins 4-Way Flat Trailer Connector w/ 48" Harness
(48 reviews)
Price: $5.45
In Stock
Hopkins 4-Way Flat Trailer Connector w/ 48" Harness
Item # HM48035
Retail:$10.43
Our Price: $5.45
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In Stock
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- All Info
- Reviews (48)
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Hopkins Trailer Wiring - HM48035
- Trailer Connectors
- Vehicle End Connector
- 4 Flat
- Plug and Lead
- 0 - 5 Feet Long
- Hopkins
If you already have the tools and hardware needed for installation, this no-frills, universal, splice-in, 4-way flat connector will get you towing in no time. Color-coded bonded wires have functions printed on them to make installation easier.
Features:
- 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)
- Works with 2-wire electrical systems
- Splices into your vehicle's wiring
- Bonded wires are color coded (see wiring configuration below) and labeled
- Wire connectors sold separately
- Includes durable, molded-rubber, standard female output socket
Specs:
- Harness length: 48"
- Max amperage: 2.5 amps per circuit
- Wire gauge: 14
- 90-Day Warranty
4-Way Trailer Connector Installation
Because the color/function of the wires on this connector may not match the color/function of those on your vehicle, be sure to use a tester (sold separately) to double check the function of each wire on your vehicle's tail light wiring harness before installing this connector. Once you've figured out the functions of your vehicle's wiring, use quick-splice or butt connectors (sold separately) to connect the corresponding wires on the trailer connector.
The number 1 reason trailer wiring comes up faulty is a bad ground, so make sure your ground wire has a solid and clean connection to metal. To make this connection, you'll need a ring terminal and a self-tapping screw (sold separately).
Wiring Configuration
| Wire Color | Wire Function |
|---|---|
| Green | Right turn and brake light |
| Brown | Tail lights and running lights |
| White | Ground |
| Yellow | Left turn and brake light |
Quick Tips:
We install a lot of wiring harness around here, so we thought we'd share a few tips we've picked up over the years:
- Butt connectors - especially heat-shrink ones - provide the most secure, longest-lasting connection, so we'd recommend you grab a few and swap them out for the quick-splices in this kit.
- Use a circuit tester on the plug terminals once the harness is installed to make sure everything's working. There's nothing worse than figuring out that you have a bad ground or a faulty connection right before you're about to hit the road.
- Be sure to put a little bit of dielectric grease on the 4-way plug to protect the terminals from dirt, grime, and corrosion.
48035 Hopkins Vehicle Wiring Harness with Vehicle End 4-Pole Connector - 4' Long
Installation Details
California residents: click here
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
- Wrong item was ordered
Customer Reviews
Hopkins 4-Way Flat Trailer Connector w/ 48" Harness - HM48035
Average Customer Rating: 4.9 out of 5 stars (48 Customer Reviews)
If you already have the tools and hardware needed for installation, this no-frills, universal, splice-in, 4-way flat connector will get you towing in no time. Color-coded bonded wires have functions printed on them to make installation easier.by: Mike A10/23/2017
SMI Stay in Play Duo installation in 2015 Jeep Wrangler Unlimited –
Packaging was great with everything needed included plus extra items for various installation methods of you’re choosing. Upon initial investigation and survey, everything except the CD Information pack was accounted for.
No big deal, as I had previously watched 2 different Youtube installations found on the internet. In fact, the internet videos were what I used as my step by step installation process, and the written instructions were only used for concerns where the video may not have been as clear as I had hoped for.
Understanding that everyone has their own style and methods for doing this project, I purposely was not in a hurry to rush through it. All in all, I took @ 8 hours to install the Adapter 4 to 6 pole #30637, the EZMount Tow lights Kit, and the Stay in Play Duo Braking System.
I choose the EZMount because I didn’t want to mess around with the OEM taillights and wiring. Magnetic lights don’t work so well on composite tops and I didn’t want to stick them to the sides of te Jeep, so I modified the EZ mount to wrap around the thickness of the rear glass hatch on both sides. I added a 2”x 4” pc of Velcro on the inside of the glass hatch and the mating surface of the plastic light housing - to hold the lamps in place until the rear gate was closed.
I ran the wire harness on the inside under the trim all the way up to the front and through the grommet in the firewall. The flat 4 wire was routed and secured up to the Adapter 4 pole to 6 pole that I had fastened to the Blue Ox base plate.
The actual installation of the SMI unit and assorted parts went rather smoothly. Most difficult issue was the lack of working space in front of the driver’s seat area. Installing the screw that holds the G force controller on the front (the side towards the front of the car) was difficult as it was almost a blind installation due to lack of room. The nut and fender washer used through the fire wall for attaching the air cylinder cable bracket was a challenge to reach - tight fit with not much room for one's hand and arm.
Other than that, no big surprises – just a lot of tedious steps to do when you want to be sure that it is being installed properly – take your time and don’t be in a hurry.
Once everything was installed – it all worked when I checked the system out. The only thing that may seem a bit odd is that when setting the G force initially, the compressor will shut off while adjusting per instructions. To do this initial adjustment, the wife stepped on the brake in the Motorhome, with the switch “On”. The compressor starts, and the brake is pushed down by the Air Cylinder, at which time I slowly adjusted the G force until the compressor shuts off. I secured the adjusting bolt and I told the wife to take her foot off the brake and then re-apply them. The compressor did not start again and the air cylinder did not apply the brakes in the Jeep. After setting the G force per instructions, the unit didn't turn on when the brakes in the Motorhome were applied - but since we were not moving - all I can assume is that the brake system will function while slowing down once the accelerometer setting (the sensitivity setting on the G force box) has been met. I assume that the sensitivity setting method includes a way to ensure the Jeep brakes are not engaged too frequently and only until needed.
This is the only step that is a tad bit confusing without an explanation as to what to expect once the G force sensitivity is set.
Lastly, I checked the brake away switch and it turned the compressor on and applied the brakes as expected.
Overall - the installation went rather smoothly. Can't wait to see how the product works once we hit the road. I'll check back and provide an update later.
by: Mike 09/19/2023
looks okay.
by: Richard10/27/2017
Ordered this Hitch for a 1998 Ford F-150. It was ordered late Thursday night, and was setting on my front porch Monday morning. This is some of the fastest service I have experienced for a large item. My compliments to your shipping department.
The F-150 has a 17 inch spare so no need to drop it. the hitch went right up. Two men lying under the truck had it mounted, and torqued down in less than 30 minutes. Beautiful hitch, and really well made, and since I have built several Class IV hitches from scratch I know what I'm talking about.
Thanks etrailer.com
by: Richard A.05/11/2020
I bought wiring and connectors to rewire a 30+ year old utility trailer. All items purchased were of excellent quality and the trailer lights work well. I was especially pleased with the jacketed 4 conductor wiring.
by: Glenn 02/28/2023
Awesome product
by: Robert08/03/2018
The customer service at etrailer is, as always, excellent. My product shipped quickly and arrived soon after I ordered. The videos and instructional material were very helpful in ensuring I was purchasing the correct product. For trailer or trailer related products I will not shop anywhere else. I needed this because my old harness had corroded terminals. This will be simple to replace.
by: Tim.efcc02/23/2023
Great, well-made product at an outstanding price!
by: Andrew 07/11/2021
The product will be replacing an existing pigtail that is showing signs of corrosion on the terminal ends and sometimes need a light wire brushing to make electrical contact. The terminals on this piece appear to be a better metal and time will tell if they resist the corrosion any better.
by: Eric05/25/2022
Super simple to install and it followed the installation video exactly.
by: Raymond L07/21/2016
I am very happy with Rebecca's help over the phone and assisting me with ordering my wiring harness with bracket on my 2015 Chevrolet Colorado. I received exactly what I need. Would recommend Etrailer to anyone. Thanks Rebecca and Etrailer
by: Kevin S.12/03/2015
Wire harness seems to be well made. Fits my trailer plug perfectly. Great price from etrailer, and pretty quick shipping as well. This is my second purchase from etrailer and I couldn't be more pleased with both transactions.
by: Brad04/22/2019
I haven’t installed the wiring yet, but if I have a problem it won’t be because of etrailer since they didn’t make the wiring harness. Will do this tomorrow.
by: Ron 06/05/2021
Glad they carry Hopkins products. I prefer Hopkins over others because the wiring plastic insulation is heavier. Excellent quality product.
by: Gary M.07/26/2015
An amazing wealth of products.
And an even greater knowledge base to draw on for info and direction.
etrailer.com is my favorite "bookmark"
by: Travis04/06/2015
wiring harness of good quality, just as shown, thanks
by: Toby07/29/2015
Product was received promptly and worked great on an older Jayco popup camper. I would use etrailer on future purchases for any of my trailer needs!
by: Ray Low03/13/2017
Great stuff to work with. Pallet racks and etrailer parts
by: Daron06/24/2022
Not much to say but it works
by: Kirk 10/17/2019
Quick and easy to connect
by: Bob D07/15/2020
Works fine
by: Brian S. DAV11/22/2016
I've always gotten good quality products and if there was a Problem Prompt an Courteous Responses,,Thx for always being Professional,,,
by: Robert09/06/2023
by: ChiGuy07/10/2018
Works great so far.
by: Vince10/31/2017
great prices and prompt shipping
by: Jeffrey11/03/2017
As expected.
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Show More Reviews
See what our Experts say about this Hopkins Trailer Wiring
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Do you have a question about this Trailer Wiring?
Info for this part was:
Video by:
Andrew K
Video by:
Thomas T
Expert Research:
Michael H
Expert Research:
Jeffrey L
Written by:
Laura H
Video Edited:
Chris R
Updated by:
Wilson B
Updated by:
Alexander C
Updated by:
Sabrina W
Installed by:
Ryan G
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Bob D.
7/16/2021
works just right