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. Lowest Prices for the best wiring from Hopkins. Hopkins Endurance 4-Way Flat Trailer Connector Socket - Vehicle End - Ergonomic Design part number HM48030 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Wiring > Trailer Connectors > Vehicle End Connector > 4 Flat > Plug and Lead > 4 Feet Long > Hopkins

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

Hopkins Wiring

(419 reviews)


Code:   HM48030

Price:$5.99


Shipping Special

Shipping Weight: 0.27 pounds

Quantity: 






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.


Features:

  • 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


Specs:

  • 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






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


Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.




Video Transcript for Hopkins Wiring HM48030 Review

Today we're going to be taking a look at part number HM48030. This is the Hopkins Endurance 4-Way Flat Trailer Connector Socket for the vehicle end. It's going to feature an easy pull oversize grip. It's going to make connecting and disconnecting quick and easy. It's got the heavy duty housing with the included dust cover that's already pre-attached to the housing. That's designed to go over the connection points and protect them from the elements when your connector is not in use. The housing is also going to feature a couple mount holes.

That way you can connect this to the bracket or to the bumper of the vehicle. It's going to include a terminal grease packet and a self-tapping screw for a ground connection. Both of those are included. The terminal grease, we always recommend to use that on all electrical connections. That's going to help prevent any type of corrosion from settling in and causing any type of damage to the connections themselves. This is a 4-way flat socket for the vehicle side.

It's going to work with all 4-way flat connectors, a universal system. It's going to have the protective sleeve that goes from the back of the connector. Looks to be about 12 inches deep here on the wiring. That's going to prevent or insulate the wires from any type of wear or tear or damage. It's also going to help protect the wires at the plug from the weather.

The wires are going to measure 48 inches in total length. It's going to feature the pigtail leads. One wire is going to have your ring terminal attached to it. That's going to be for your ground connection. That's the black wire with the white stripe.

The black wire with the green stripe is going to be for your right turn and brake signal. The black wire with the yellow stripe is for left turn and brake, and then the black wire with the brown stripe is going to be for your tail lights. That's going to do it for today's review of part number HM48030. Hopkins Endurance 4-Way Flat Trailer Connector Socket for the vehicle end. .


Customer Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (419 Customer Reviews)


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.


- HM48030

by: Danny W.07/25/2013


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


Comments

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

Patrick B - 07/31/2013

1829

- HM48030

by: Ron K07/11/2014


Did lot of searches for an item like this and found it only on etrailer. Ordering was easy, communication was excellent and shipped promptly. Item looks to be well made and I can install it by drilling only one hole. Exactly what I needed for my application. 140829



- HM48030

by: Wayne W.02/24/2014


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

by: Edd V.11/04/2013


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



- HM48030

by: Barry S04/02/2012


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



- HM48030

by: Fred Lewis07/23/2016


Buy from e trailer all the time great price and ships right away! 275449



- HM48030

by: Mike02/11/2015


Always quality products and great customer service! 173307



- HM48030

by: Mikey06/29/2015


Nice little connector just what I wante d! 208242



- HM48030

by: D.R.06/25/2012


Excellent products and service!!! 45528



- HM42137

by: Steve M.08/16/2013

2009 Dodge RAM 2500

Review from a similar Hopkins Endurance in Wiring


Exactly what I needed. The Hopkins Endurance 5th Wheel 90-Degree Harness is truly plug 'n play. Once you decide on the truck bed location for the new 7-pole plug and drill the hole the rest is simply snap together and you're done. The new harness fit perfectly with the factory 7-pin connector and had plenty of length to allow for the new plug to be mounted conveniently in the truck bed wall. No more cable hanging out over the tailgate. 95342


Comments

I have used the Hopkins Endurance 90-degree harness monthly over past year since installation. I have also used the factory bumper 7-pole plug as my towing needs required. Both connectors work every time indicating a solid fit and good contact between the factory 7-pin connector and the added Hopkins Endurance connector. Very pleased with both ease of installation and performance.

Steve M - 08/23/2014

6435

- HM48480

by: Brian M10/08/2013

Chevy Silverado

Review from a similar Hopkins Endurance in Wiring


etrailer gave excellent service. Shipping was prompt. Email followup was excellent. I needed a part to hook up to a Silverado 3500 with the wires to the bed already there (taped up at the front of the bed on the driver side) and didn't want to tap into the existing plug on the bumper. The L Shaped bracket is easily detachable so that the plug can be screwed directly into the sheet metal of the truck bed once a hole is cut. However 2 things....the unit comes with nuts and bolts so get ready for a trip to Home Depot to get some sheet metal screws of some sort for most installs in the bed. Second, the holes that the screws must go in are hex shaped which is great for the bolts that come with the unit but not for sheet metal screws so be sure and get screws with a small enough head to countersink into the holes or with a big enough base so as not to sink into the hex shaped holes. 103078



- HM48510

by: Jack09/13/2013

2010 Ford F-150

Review from a similar Hopkins Endurance in Wiring


I am enclosing 2 photos of trailer connector I purchased from etrailer. I have a 1995 Dutchman popup trailer. It had a 6 way round connector which would not fit my 2010 F150. By using your trailer connector diagrams, I was able to determine Dutchman was using white for the ground, blue for brakes, black for battery, brown for right turn/brake, red for left turn/brake, and green for tail lights. I replaced the 6 way with your 7 way connector. 99746



- HM40157

by: Donn M06/04/2013

Ford F-250

Review from a similar Hopkins Endurance in Wiring


I needed to rewire the " speghetti " wiring mess that trailer companies installed on my truck. What a mess but Doing business with etrailer was a wonderful experience. I ordered a a 5th wheel trailer wire kit to plug into OEM connector and a bumber 7 pin connector kit for my F250. All was Plug and Play. Took less than and hour and all lights, brakes, aux. everything worked perfect and first time. I now have a very clean, professional wiring. Looks better than factory installed. Also all the LED lights I ordered for the boat trailer fit perfect and looks great. Very satisfied customer. Trailer Wheel and Frame is 10 miles away but I will be getting my trailer parts from etrailer from now on. Great Service and follow through on the order. I was notified and in the loop every step on the order and delivery process. Thanks again 83371



- HM48470

by: Darryl F02/11/2014

2006 Toyota Tacoma

Review from a similar Hopkins Endurance in Wiring


I had broken my factor connector on my 06 Tacoma, frankly due to a poor design placement by Toyota in my opinion, however I was not going to pay a premium $200+ price for a new OEM part and I wasn't planning to place it back in the original spot to only get broken again. This is a great replacement plus I no longer need a wire adapter. The unit fit perfectly in pre-cut hole that held my left tag light. Only had to drill 4 small holes for the bolts to secure to the bumper. Only pain was cutting the old wire and attaching it to the new connector, but that only took 10 minutes top. 116271



- HM48470

by: Gerald09/13/2013

2013 Jeep Wrangler

Review from a similar Hopkins Endurance in Wiring


Installed: 9/12/2013 Jeep Wrangler Unlimited Installation of the plug was a quick and easy. The existing Warrior hitch has a tab on the side for a trailer wiring socket. Drill a new hole on the installation bracket (comes with the trailer connector) so the bracket on the hitch matches bracket on the trailer connector. Done deal. This is the only trailer connector I found which has the 7, 5 and 4 connector options. Flexibility is always a good idea when you are borrowing someone else trailer or renting. 99853



- HM48470

by: Bryan12/28/2010

Jeep

Review from a similar Hopkins Endurance in Wiring


Plug installed on my Jeep Turned out pretty cool, if I say so myself. 4716



- HM48470

by: Rik09/15/2014

Jeep Wrangler TJ

Review from a similar Hopkins Endurance in Wiring


the perfect plug for mt Wrangler tj 151123


Comments

Its tough.

Rik - 09/15/2015

14995



- HM42137

by: Mike R.05/20/2013

2006 Dodge Ram

Review from a similar Hopkins Endurance in Wiring


Finally got the right part, my bad the first time, and the Hopkins wiring harness was in my 2006 Dodge Ram truck in less than 30 minutes. Most of your time will be spent drilling the hole in the side of the bed. I used a 2" hole saw vice the 2 & 1/8th (already had the 2" and didn't want to run out and buy another hole saw) and had no problems getting the harness through the hole. Hooked up the trailer and everything worked perfectly. There's plenty of harness, maybe too much, for any application in the truck bed. Great product! 81086



- HM48470

by: Brian N.09/06/2014

2008 Dodge Durango

Review from a similar Hopkins Endurance in Wiring


Part arrived quickly and was exactly as pictured. Installation on my 2008 Dodge Durango was a little tricky, as there is no easy place to install it. Luckily my buddy was able to drill holes in bumper next to the hitch and then tap them so we could attach the connector with screws. There is not much room for the connector to fit, but by bending the metal mounting plate slightly it worked perfectly. The chart included with the product made it easy to wire correctly. 150280



- HM47200

by: Joel B,05/14/2014

2001 Dodge Durango

Review from a similar Hopkins Endurance in Wiring


Excellent products that resolved my trailer connection issues. The "Hopkins Quick-Install Trailer Connector Adapter 4-way flat to 7 blade HM47200" and the "T-1 Vehicle Wiring Harness with 4 Pole Flat Trailer Connector 118334" were the perfect combination for the quick, simple and successful installation on my 2001 Dodge Durango. Along with the great products "etrailer" provided helpful information on their website, and fast shipping! Thanks again! 130600



- HM48470

by: Todd R11/05/2013

Jeep

Review from a similar Hopkins Endurance in Wiring


I bought this to replace a factory Jeep 7 point connector. I didn't figure out till I was done that the brackets were the same shape and I could have left the original on. It was very easy to install, even for someone as mechanically challenged as I am. The bracket that was included is a bit flimsy and there were no self tapping screws with it. Otherwise it was exactly what I needed. Less than 30 minutes to install 106389



- HM40157

by: Tristan L.04/16/2014

1999 Ford F-250

Review from a similar Hopkins Endurance in Wiring


I purchased this harness to fix up a rat's nest of wiring the previous owner did on the vehicle when trying to install a brake controller. This product was exactly how it is described and fit perfectly. It plugged right into the stock harness on my 99 F250 SD and required no splicing of wires at all. Very clean just like OEM. It was well worth the money to have lights that I know will always be working for me! 125481



- HM48470

by: Greg C03/12/2014

2013 Ford F-150

Review from a similar Hopkins Endurance in Wiring


This is a nicely built durable connector , the install was easy but took some time ...I pre wired it with a four blade male which plugged into the factory four blade female on my 2013 f150 ... just make sure your connection screws are tight , I added silicone to them so they dont back out ... Looks great and it is defiantly a nice piece of hardware , spring shuts tight and seals nice ... 120457



- HM40157

by: Ralph H.03/04/2015

Ford F-350

Review from a similar Hopkins Endurance in Wiring


This looked like the product I needed to put a 7 pin connector in the bed of my F350 to plug in my camper, but I wasn't sure so I called customer service. The customer service rep was very knowledgable about my different options and assured me this would work great. It was easy to install and is far more professional than splicing in to wires. It took less than 1 hour to install. 176928



- HM48470

by: Calvin P.01/02/2015

2015 Chevy Silverado 3500HD

Review from a similar Hopkins Endurance in Wiring


I used this to complete the factory 5th wheel wiring in my 2015 Silverado 3500HD. Gives me a professional installation for my 5th wheel RV. 167564



- HM48470

by: Greg09/03/2013

Volvo XC90

Review from a similar Hopkins Endurance in Wiring


The connector interfaces very well with my XC90 and there is no drilling or advanced skills needed. Everything went together very well. 98025



- HM48470

by: Chris01/21/2012

2002 Ford F-150

Review from a similar Hopkins Endurance in Wiring


Its exactly what I needed to rewire my truck (2002 F150). My only complaint is that once you snap all the parts together in the rear, its very difficult to take apart. I ended up breaking off one of the clasps while trying to adjust the wiring. It still seals in the wires and has a tight fit. I really like my setup now!!! 30096



- HM40940

by: SHAWN07/30/2014

2011 Volkswagen Touareg

Review from a similar Hopkins Endurance in Wiring


Bought this for my 2011 VW Toureg and it fit perfectly into the original small 7 pin factory attachment. The only complaint is that only one of the holes matches up to the factory cable holder on the VW. So I can only screw in one of the screws into the holder without fabricating some more holes by drilling. 143590



- HM42137

by: Sam Liming05/27/2014

Dodge

Review from a similar Hopkins Endurance in Wiring


The wiring harness for my gooseneck 7 pole hitch on my Dodge is as advertised. The only problem is I looked under my truck it is not wired with a stock connector. I will have to cut and splice it anyway. Not a problem with the product but with my wiring. 132815



- HM48470

by: Victor Lagomasino01/24/2014

Ford F-250

Review from a similar Hopkins Endurance in Wiring


This website has a huge selection of products. Shipping was very fast and the regular updates were appreciated. The item is very robust and appears to be well built. Installation was straight forward. Was a great replacement for the stock F-250 connector. 114683



- HM48470

by: Bruce01/29/2013

Volkswagen

Review from a similar Hopkins Endurance in Wiring


The product is well constructed. I did not realize until after starting the project that my car (volkswagon) had a the type of electrical system thtat required an electrical converter. I look forward to many years of use once I get the system hooked up. 64436



- HM40940

by: dennis g.02/06/2014

2014 Jeep Grand Cherokee

Review from a similar Hopkins Endurance in Wiring


a great fit for my 2014 jeep grand Cherokee. Plugged in to the wiring provided by Jeep from the factory. Also, the 7 to 4 pin adapter fit right into the now 7 pin plug so I can tow U-Haul trailers, pop up campers, etc. Thanks so much!!!! 115940



- HM48470

by: Jim S08/06/2012

Ford F-150

Review from a similar Hopkins Endurance in Wiring


This item is very nice. I was replacing the Ford original on my F150 pickup and the existing wires fit without any modification. I like the dual connectors. Now I can use either the 7 way or 4 way without any additional adapters. 50742



- HM48480

by: Mike S.07/15/2013

Toyota

Review from a similar Hopkins Endurance in Wiring


Great value. Toyota wanted $235 for the replacement which included an 18" wiring harness with a Weatherpack connector. I cut the Toyota harness at the failed socket and attached the wires to the new socket as shown in diagram. 89557



- HM48470

by: Deon D03/06/2013

2004 Chevy 1500 Silverado

Review from a similar Hopkins Endurance in Wiring


Great product. After losing two 4-pin adaptors I decided to purchase this product. 15 minute installation. Mounted in factory location on 2004 Chevy 1500, just had to drill four holes in OEM bracket. Too easy. 69295



- HM48240

by: Bob V.07/31/2013

Honda Gold Wing F6B

Review from a similar Hopkins Endurance in Wiring


Great value and the communication and shipping time couldn't have been better.Can't wait to wire up the lights for the hitch mounted rack for my Honda F6B. Thanks 92563



- HM48420

by: Randy D.03/17/2015

Jeep Wrangler

Review from a similar Hopkins Endurance in Wiring


This product was exactly what I needed to complete the wiring connections between the RV and Jeep Wrangler. Comes with easy instructions and mounting hardware. 178913



- HM48420

by: Darren L04/03/2015

2012 Ford Fiesta

Review from a similar Hopkins Endurance in Wiring


Worked as expected! Easy to install wires and by using the included bracket, had no problem at all installing it on the front of my TOAD (2012 Ford Fiesta) 182819



- HM40920

by: Don04/20/2015

2003 Chevy Silverado 2500HD

Review from a similar Hopkins Endurance in Wiring


Item fit a little loose on the bracket of 2003 Silverado 2500hd. Door seems flimsy, could break. 186862



- HM48190

by: Dave C,11/01/2015

Ford

Review from a similar Hopkins Endurance in Wiring


Used on my Ford to try to keep from replacing my factory harness. Hope it last for awhile. 231257



- HM42137

by: Jerry G05/28/2013

2006 Dodge Ram 2500

Review from a similar Hopkins Endurance in Wiring


Simple to install, works great. Installed this on my 06 2500 in less then 30 minutes. 82238



- HM40930

by: Dirk H.12/15/2015

2001 Chevy 1500 HD

Review from a similar Hopkins Endurance in Wiring


Great Product,Exact fit for my factory plug.2001 Chevy 1500HD Crew Cab 233828



- HM40157

by: Henry K05/07/2014

Review from a similar Hopkins Endurance in Wiring


Suzanne T was extremely helpful. When the phone got disconnected, she called me back to make sure the order was complete and I was satisfied. I put the parts on today. They all fit perfectly and function flawlessly. Thank You Suzanne!! 129471


Comments

Still working great!

Henry K - 05/08/2015

11521


Comments

works great N0 problems

Henry K - 05/10/2015

11565



- HM48420

by: Tom O05/18/2013

Review from a similar Hopkins Endurance in Wiring


Worked for me. I used the six wire even though I only hooked up 4 for the toad. The RV 7 blade allowed me to bring a power lead to the toad if I ever need it for charging or power the Aux Brake unit. The bracket could be rotated in any direction and I found the best way was to rotate 90 degrees and install to the base plate. My toad grill made for a tight fit for both break-a-way switch and light connector, but they fit side by side with the addition of an L bracket for the break-a-way. The wiring connections seemed solid and water tight. Wired correct 1st time, No Problems. 80814


Comments

Still good after a year of use.

Tom O - 05/25/2014

4423

- HM48470

by: Vito Lotta - San Diego08/02/2014

Review from a similar Hopkins Endurance in Wiring


I could not find a 7 round with a 5 flat connector anywhere in San Diego. Most of the people I spoke with at trailer shops or RV stores said no one makes it only with a 4 flat connector. I just kept looking because I needed one with a 5 flat for my boat and didn't want to keep using my adaptor. I found etrailer and the rep I spoke with was very knowledgeable and said he had exactly what I was looking for and it was a great price. I will be always using etrailer for my trailer parts for now on. Thank you, Vito Lotta - San Diego 144089


Comments

Still working Great

Vito L - 08/02/2015

13816



- HM48510

by: Chad W.11/28/2012

Review from a similar Hopkins Endurance in Wiring


This plug works great once it is wired in. The only problem I have with it is that it does not receive the wire in a way that makes it easy to assemble, and I'm talking about the housing at the rear of the plug. The connection points are very easy to make up. Once you finally get it all together. It is very durable and weather proof. 60183


Comments

As a follow up, its been a year and I have not had any problems with this product.

Chad W - 05/29/2014

4499

- HM48240

by: Pete06/11/2013

Review from a similar Hopkins Endurance in Wiring


Before I start I want you all to know I am not good at anything with wires or water, period. I had an old 4x8 trailer that needed to be re-wired. I was not looking forward to screwing it up which was inevitable If I touched it. But, I need the trailer for the July 4th weekend so by chance I ran across your site. I found the video on how-to rewire a trailer. Though you made it look easy *I* would be attempting this! Okay, the project took a bit of time since I questioned everything twice (about an hour) but I have to say, IT WAS NO PROBLEM re-wiring the trailer. The 4-way trailer harness is much better than the harness I had on it and the whole project was actually fun to do (and I hate this type of stuff). I love the quality and really love the connector 'cap', even though the trailer is garage kept. Thanks for the products and the video assistance, it was easy because of you! 84151



- HM47890

by: bob s.04/27/2016

Review from a similar Hopkins Endurance in Wiring


The female connector is attached to the swing arm of a motorcycle to provide lighting lighting for a trailer pulled by the motorcycle. This means that there is likely much more movement in the harness than for an automotive application. I've never had a problem with any part of the harness. I found this product to be exactly what I wanted, well made and easy to install. The protective cap functions well as it remains pliable (flexible) after a year of use, and while it has never fallen off in use, it is easy enough to remove before making the connection. It has done the perfect job of keeping mud and other detritus out of the contacts. The recessed nut holders also function well and is one of the reasons I chose this wiring kit. This wiring kit gets high regard and recommendation from me. All of my purchases from etrailer have been solid products delivered at reasonable cost. 247083



- HM48110

by: Wayne Miller08/09/2013

Review from a similar Hopkins Endurance in Wiring


Comes with documentation about wiring and a grease packet to put on the contacts to prevent corrosion. Wires are black with a colored stripe for identification per the documentation in the package. 94229


Comments

Good sealed connector. Having the functions marked on each wire is great...no worry about color coding differences between different vintagesmodels of trailers or vehicles.

Wayne M - 02/07/2015

9357



- HM48470

by: John L05/19/2011

Review from a similar Hopkins Endurance in Wiring


I received the product quickly and in perfect condition the packing was excellant. I installed the connector easily and quickly. I consulted the Gm wiring diagram and als found the wires for all the 7 connections. I had a tight spot within the bumper edge, but managed to find short bolts to attach the bracket in old exsisting holes. The rest was easy attaching the connectors and making sure all wires were through the rear enclosure and tightening them down. I tested the 4 wire connector with my boat trailer lights and it worked like it was designed to do. I LOVE the versatility of this connector. Thanks etrailer.com!! Great product at a great price. 14869

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Ask the Experts about this Hopkins Wiring
Do you have a question about this Wiring?


  • How to Make a 6-Way Square to 4-Way Flat Trailer Wiring Adapter
  • The 6-Way square trailer connector is not used by a lot of trailer manufacturers. A lot of Jayco trailers may have them but mostly you come across the 4-Way flat, like what you have on your trailer, and the 7-Way blade for RV applications. What I recommend is to convert the 6-Pole on the Monaco to a 4-Way. You can do this very easily by removing the 6-Way plug, and then testing the wires for function using a circuit tester like # 3808 if needed before installing them in a new 4-Way,...
    view full answer...

  • Running Lights Work But Brake Lights and Turn Signals Do Not Work on Coleman Camper
  • The best way to start troubleshooting your truck and trailer is to disconnect the two and test each one separately. If you have access to a different tow vehicle or trailer you can test using one of these to isolate the problem to either your truck or camper. Inspect both the vehicle and trailer connectors for signs of dirt, discoloration or corrosion. Even very slight greenish or whitish discoloration on the connectors can interfere with signal transmission. You can try cleaning the...
    view full answer...

  • Converting a 6-Way Rectangle Plug on a Monaco Diplomat to a 4-Way Flat for a Boat Trailer
  • The 6-Way square trailer connector is not used by a lot of trailer manufacturers. A lot of Jayco trailers may have them but mostly you come across the 4-Way flat, like what you have on your trailer, and the 7-Way blade for RV applications. What I recommend is to convert the 6-Pole on the Monaco to a 4-Way. You can do this very easily by removing the 6-Way plug, and then testing the wires for function using a circuit tester like # 3808 if needed before installing them in a new 4-Way,...
    view full answer...

  • How to Connect the Ground Wire on a 4-Way Flat Wiring Harness
  • The Hopkins Endurance 4-way Flat Trailer End Connector, # HM48110, that you referenced is the harness that goes on a trailer, not a vehicle. The 4-way connector for your vehicle is the Hopkins Endurance 4-Way Flat Vehicle End Connector, # HM48030. You can connect the white ground wire from the wiring harness to a vehicle ground, but you should verify that the white wire on your vehicle is in fact a ground wire. In most cases the white wire from the wiring harness is attached to a clean,...
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  • 4-way Options for use With a Tow Ready Mounting Bracket
  • The Hopkins 4-way # HM48030 that you referenced is a great 4-way, but like you noticed, it is much larger than most 4-ways so it would not fit through the Mounting Bracket 4-Pole Flat # 18144 that you have. You basically have two choices at this point. You can either buy a different 4-way that will fit through the hole of the # 18144. Or you could cut off your # HM48030 and then run the wires through the front of the # 18144 and then reconnect the wires to the 4-way wiring of your vehicle. Check...
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  • Semi-Truck Style Round 7-way to RV Style 7-Way Adapter Recommendation
  • To tow a trailer that uses a RV style 7-way blade-style trailer connector with semi that has a 7-pin connector, you will need to construct an adapter that also combines the brake signal into the right and left directional signal pins. This can be done by using a female 7-pin socket # PK11720 to accept the plug from the semi, a tail light converter # 119178 and a female 7-way RV blade-style socket # PK12707. The converter would be wired in between both sockets to combine the brake...
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  • How Come this 6 Way Square Adapter # 30104 Will Not Work on My 1983 Coleman Pop Up
  • The reason you are not getting the lights to work is that this Adapter 4 Way Flat to 6 Way Square for Jayco, part # 30104, is because this adapter is wired to only work on Jayco trailers, and is not wired to work on your Coleman Pop up. Although we can not sell you an adapter that would work on your Coleman trailer because of propriety issues with Coleman, there is a way you could get your trailer lights to function properly. You will need to connect the # 30104 to your vehicle and...
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  • Part Recommendations For Flat-Towing A 2006 Hummer H3
  • In order to be able to flat-tow your 2006 Hummer H3, there are 5 items needed. You will need base plates for the Hummer, a tow bar, safety cables, lighting for the H3, and most states now require a supplemental brake system. The base plates I recommend are the Roadmaster Base Plates, part # 2505-3. When the front arms are removed the system is virtually invisible. The tow bar I recommend is the Roadmaster Falcon 2 Tow Bar, part # RM-520. This tow bar has a weight capacity of 6,000...
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  • Replacement Trailer Wiring Harness For 2013 Toyota Tacoma
  • There are a couple options depending on the wiring you have on your Tacoma. If you smashed your 4-way connector on your truck and want to replace the entire wiring harness then I recommend part # 118496. This plugs into the vehicle wiring either behind the tail lights or along the frame rail of your truck. This includes the tail light converter and is a plug and play harness. If you tore up the 4-way connector you can simply just use a 4-way connector like part # HM48030. You can...
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  • Trailer Wiring Harness for a 2012 Kia Sorento
  • Your 2012 Kia Sorento has a separate wiring system. This means that the brake lights and turn signals are on different circuits/bulbs. Trailers on the other hand have a combined system with the turn signals and brake lights on the same circuit/bulb. So you would not be able to just wire in a vehicle side 4-Way directly to the lights on the Sorento because you would either have brake lights or turn signals but not both. You will need the proper harness that includes a converter for...
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  • Replacement 4-Way Recommendation for Vehicle with 5 Wires Ran to 4-Way
  • For a very rugged replacement 4-way for you to use on your vehicle we have the part # HM48030 which would work well. Chances are you have two wires ran to the running light circuit of the 4-way. What you can do is run those wires together and then run them to the one running light wire of the # HM48030 and you would be just fine.
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  • Troubleshooting Running Lights Circuit on Factory 4-Pole Wiring on 2011 Ford Ranger
  • The best way to evaluate the operation of the factory 4-pole wiring harness on your 2011 Ford Ranger is to use a circuit tester like # 40376 but there are also checks you can do without a tester. It is possible that you may have just a corrosion problem on your 4-pole and this is easy to check. Inspect the metal contact surfaces for any signs of even slight greenish or whitish discoloration. Pay particular attention to the pin for the brown (tail light) wire. Clean the contacts as necessary. Another...
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  • 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...
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  • How to Connect the Tow Bar Wiring of the Roadmaster Sterling to Trailermate Vehicle Wiring
  • So it sounds like you are using the Trailermate Wiring Kit part # TM780072 as tow bar wiring for your 2015 Chevy Equinox and are looking for a way to convert the 6-way wiring that comes with the Roadmaster Sterling Tow Bar part # RM-576 to match the 4-way. I have a better solution for you, what you will want to do is remove the 6-way end of the tow bar wiring that comes with the Sterling, and then run the wires to a 4-way like the part # HM48030. Then the wiring will plug straight into...
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  • Recommended Replacements for Factory 4-Pole Trailer Connector on 1999 Dodge Dakota
  • You have two alternatives for replacing your factory 4-pole trailer connector. First, you can simply abandon the old connector by taping it up out of the way and use what's called a T-Connector like part # 118329. A T-Connector would plug inline with the factory connector between the vehicle's taillight wiring harness and the taillight assemblies. This solution works well, but if your trailer has more lighting than one pair of stop/turn/taillights at the rear you'll want retain the factory...
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  • Adapting a 7-Pin European 7-Way on 1999 Range Rover to US 4-Way Flat Trailer Connector
  • You would have the same problem using adapter # 118710 as you would with just splicing in a 4-Way. The adapter doesn't convert the separate signals to combined signals used by most trailers in the US. You would need to add a converter, # RM-732, which will take the separate signals and combine them. You could then wire in a 4-Way flat such as # HM48030 on the output side of the converter.
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  • 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...
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  • Do I Need to Install a 4 Flat Connector on my Motorhome with 5 Way Round
  • I recommend installing a 4 way flat like the Hopkins Endurance, # HM48030, on the back of your RV. This will allow you to plug directly into the Roadmaster Universal Wiring Kit, # RM-154. Since your RV is already wired for a trailer connector, you will not need to use the Roadmaster Brite-Lite Wiring Converter, # RM-732.
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  • Replacement Vehicle Side 4-Way Recommendation
  • Sounds like you are looking for just a replacement vehicle end 4-way like the part # HM48030. This will wire in as a replacement for the 4-way you have installed on your vehicle currently.
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Expert Research:
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Reno H
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Installed by:
Cole B

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Theodore B

Expert Research:
Michael L

Expert Research:
Reno H

Expert Research:
Jameson C

Installed by:
Cole B

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