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7-Way Connector - Trailer End

7-Way Connector - Trailer End

Item # 54-77-003
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Bargman Trailer Connectors - 54-77-003
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Lowest Prices for the best wiring from Bargman. 7-Way Connector - Trailer End part number 54-77-003 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Bargman Wiring - 54-77-003

  • Trailer Connectors
  • Trailer End Connector
  • 7 Blade
  • Plug Only
  • Bargman


Features:

  • 7-Way trailer connector
  • Quantity: 1 connector



5477003 Bargman 7 Way Connector Trailer End





Video of 7-Way Connector - Trailer End

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Bargman 7-Way Connector Installation

Today, on our utility trailer, we'll be installing the Bargman Trailer End 7-Way Connector, part number 54-77-003. We're going to need to remove the center section by taking out the small flat-head screw right here. Go ahead and back it out. We'll simply push the center section out, and you can see here there's a slot there and a larger slot there, and that larger slot will line up with this spot right here, so you know that you're putting it back in in the right position. We have our jacketed 7-wire here with our 7 wires coming out here. We'll need to go ahead and strip back a little bit on each of the 7 wires so we can connect it into the plug itself. We'll go ahead and take our wire strippers and strip back a little bit of wire from each of the 7 wires, and with that done, we can go ahead and loosen up the screws around the plug here so we can install the wires. Next, we'll go ahead and take our wires here.

We'll feed them through our plastic housing. Go ahead and slide it down some on the 7-way. I'll go over the color that I know our trailer is wired to already. Our yellow wire on our trailer is the left brake and turn. The green wire on our trailer is the right brake and turn.

The red wire is not used. The black wire is our auxiliary 12-volt power. The blue wire is our brake wire, what controls our electric brakes. The brown wire is our running light circuit, and the white wire is our ground. Some of our wiring may not match up with exactly what's written on the back side of this, but because this is a utility trailer, this is how the customer wanted it wired. We'll go ahead and start out by putting our ground wire in.

When you're looking at the back side of the plug with the larger opening on the bottom, the ground wire will be this plug right here, and it actually is marked white, so we'll go ahead and insert that one first. Next, we're going to go ahead, and on this side right next to the white on the other side of the opening, we're going to go ahead and connect the blue wire, which is the brake wire signal. Next to the ground wire, we'll go ahead and put our yellow wire, which is the left brake and turn. Next up from the yellow, we'll be putting the brown wire, which is the running light circuit. Now, in our case, we've got the red wire as a reverse lights, so we're going to put that in the center post here. We'll go ahead and slide the cover back into place, then go head and tighten down our little set screw here. Next, we'll go ahead and tighten down the two Phillips-head screws here, which will hold a clamp down that helps secure the wire and keep it from pulling out of the plug itself.

Go ahead and take a Phillips-head screwdriver and tighten them down. That's all there is to it to installing the Bargman Trailer End 7-Way Connector, part number 54-77-003, on our utility trailer. .


Customer Reviews

7-Way Connector - Trailer End - 54-77-003

Average Customer Rating:  4.7 out of 5 stars   (81 Customer Reviews)


- 54-77-003
by:

We purchased these connectors as replacement stock for our numerous trailers as the connectors are always being damaged in the field. etrailer always has a large selection of new/replacement parts available with a very competitive pricing, good quality and quick turn-around and delivery. We have purchased from etrailer in the past and will continue to to buy from them in the future. etrailer Customer Service is always very helpful and always follows up to confirm delivery. 240307


Comments
No problems! We always keep eTrailer parts in stock.
Jim H - 03/09/2017

22661

- 54-77-003
by:

This connector is of hard plastic rather than the softer rubber. I think it will slide in and out smoother than the other ones. That means the set screw probably will not strip out as quick. 96064


Comments
Connector still working great with absolutely no problems great product
Mike - 08/20/2014

6375

- 54-77-003
by:

Junk! Super cheap soft plastic. The set screw went right threw the plastic. The screws on the clamp did the same. Don’t waste your money. 520105


Comments
If you are looking for a trailer connector plug that is not plastic I recommend pollak metal 7 way trailer plug part PK12702. It features a heavily plated metal construction for endurance.
-- Heather A - 06/12/2018

39661

- 54-77-003
by:

870410



- 54-77-003
by:

870409



- 54-77-003
by:

I was able to install the part without much trouble. The plastic outer shell seems a little fragile so I’ll need to be careful with it. 857210



- 54-77-003
by:

It fits perfectly. Recommended and easy to install. 812285



- 54-77-003
by:

As normal with etrailer, quick delivery and exactly what I needed. etrailer is my go to place when I need something trailer related. Only site I found that had a ~10 foot 7-way pigtail. This time it is not even for a trailer. I am hooking up my field and brush mower remote control to my Kawasaki Mule so I can quickly connect and disconnect it. 811767



- 54-77-003
by:

Easy to install, works great! 803970



- 54-77-003
by:

still work perfectly. Thank you 782083



- 54-77-003
by:

Replaced the plug that came on trailer after it came unplugged (but not unhitched) while going down the road and got severe road rash. This one is actually a tighter and better fit in the outlet on the vehicle than what came from the factory. If I’d known, I would have replaced earlier and had much more reliable lights on the trailer. 777256



- 54-77-003
by:

great product 769718



- 54-77-003
by:

Easy to hook up and works great. 722320



- 54-77-003
by:

One year later and the connector works perfectly. It was a quality component. 719945



- 54-77-003
by:

Works as expected. The quality is better than most off brands. 719273



- 54-77-003
by:

Still working perfectly, with zero issues to date. 670999



- 54-77-003
by:

I'm very pleased with the replacement parts I ordered and received them in a timely manner I have already recommended this site too a couple of my friends. 651359



- 54-77-003
by:

installation directions very poor after installing plug directional signals opposite so when making right hand turn blinker blinked on left hand side, Had to take apart again and redo as picture of installation procedures very poor and easy to confuse these directions should be clearer 649542



- 54-77-003
by:

Works great and easy to install 633676



- 54-77-003
by:

Well manufactured. Retainer method for seven blade insert leaves a lot to be desired, especially with wires so heavily insulated. In my opinion there should be three equally spaced retainer screws holding in place. We'll see what repeated pulling out the plug will produce over time...I have reservations. 623130



- 54-77-003
by:

Great quality and timely shipping! Thank you! 613616



- 54-77-003
by:

Perfect product. 598706



- 54-77-003
by:

This is a quality part and makes a solid connection. I used it to make a longer harness when I added drop hitch. 594101



- 54-77-003
by:

The folks at E-trailer are awesome. The part was exactly as described. There video made installation a snap, it took less then 10 minutes to remove the old part and install the new 7 pin plug end . Works like a charms . I will continue to buy all my trailer needs form E-trailer Because they always make it so simple! 561368



- 54-77-003
by:

Excellecnt product makes change outs ea sy! 554855


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Show More Reviews

Ask the Experts about this Bargman Wiring

  • 7-Way Trailer Connectors Compatible with 8 Gauge Wires for 12V Power and Ground
    The Bargman 7-Way Connector - Trailer End # 54-77-003 will handle 8 gauge wires on the positive and negative connectors. If you want the same gauge wire on the vehicle side, I recommend the Hopkins Endurance 7-Way Trailer Connector Socket - Vehicle End - Ergonomic Design # HM48480. These connectors don't specify wire gauge but will work with 8 gauge wires on the 12v and Ground pins without issue.
    view full answer...
  • Replacement Bargman 7-Way Plug part # 54-77-003
    Sounds like you are looking for the # 54-77-003 which matches the part number and description you mentioned. This is a replacement trailer side 7-way plug.
    view full answer...
  • How to Confirm Trailer Wiring Configuration to Match 2007 Jeep Grand Cherokee
    Trailer wiring often uses a particular wire color for a particular function, such as a white wire for ground, but there is no absolute rule that this will be the case. For this reason testing with a circuit tester like # 40376 is recommended. In the case of a trailer you can use a spare battery (or your Grand Cherokee battery) to test each trailer circuit to see what light activates with the 12V input power applied. The linked trailer wiring article illustrates the various connector...
    view full answer...
  • Can 10 Gauge Wire Fit The Bargman 7-Way Trailer End Connector
    I pulled one of the Bargman 7-Way Connector, part # 54-77-003 and a piece of 10 gauge wire to see if it would work. Although the 10 gauge wire is tight when inserted next to the post on the back of the connector, I was able to get it to fit and tighten, so it will work just fine for you. I have included a short video that shows the 10 gauge wire being installed on one of the posts at the back of the connector.
    view full answer...
  • Replacement 7 Way Connector for Use with 10 Gauge Wiring
    The Bargman 7-Way Connector, # 54-77-003, can be used to replace your current connector which has 2-10 gauge wires. When connecting the 10 gauge wires, as well as the other wires, you can use a ring terminal like part # DW05705-1 if you prefer.
    view full answer...
  • Does Each Circuit of 54-77-003 Use a Single Pin to Contact Vehicle 7-Way
    Each of the circuits that the 7-Way Connector # 54-77-003 has makes contact with the vehicle 7-way pins with a single pin. In case you were asking about how the wires connect to the connector check out the attached picture.
    view full answer...
  • Compatibility of Bargman # 54-77-003 7-Way Connector With # 50-87-004 Vehicle End Socket
    You can indeed install the Bargman 7-way connector # 54-77-003 onto the # 50-87-004 Sealed connector. However, there is a connector loop like this that's already constructed, part # 20027. If you're wanting to use this item to install a 7-way connector in your truck bed for a fifth wheel, we offer T-Connectors like # 41157 that would plug inline with the truck wiring harness that feeds the 7-way connector on the bumper. Some of these are vehicle specific, so if you'd be interested in...
    view full answer...
  • 7-Way Trailer Plug Adapter or Compatibility with Lance Slide-In Truck Bed Camper
    Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we do have adapters for. If you have a 7-way round, then you will use adapter # 47595. If you have a 6-way plug then you will use adapter # A10-7276VP or # PK12728. If you have the special Lance plug, I recommend replacing it with # 54-77-003 which...
    view full answer...
  • Wiring Lance Slide In Camper to Work with In-Bed Trailer Connector on 2019 ford F250
    Since the 7-way round pin plug is obsolete, your best bet would be to replace the connector on your camper with the common 7-way blade style connector. You'd remove the existing plug on your slide in camper, and replace it with # 54-77-003. You could then use an extension like # C56080 to reach the connector rearward of the wheel well.
    view full answer...
  • Diagram of Functions on 7-Way Plug
    I made a diagram for you which shows the function a 7-way plug for both a vehicle-side plug like what you get with the Hopkins Endurance Quick-Install 7-Way Trailer Connector with Universal Pigtail Harness # HM47210 or Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717, as well as a trailer-side plug like the 7-Way Molded Connector w/ 15' Cable - Trailer End # 50-67-103 or 7-Way Connector - Trailer End # 54-77-003. I have also added a link to a help article on trailer wiring...
    view full answer...
  • 7 Way Connection with Junction Box With Traditional Wiring Scheme vs RV Wiring Scheme
    I have a solution for you, but we aren't going to have any 7 way connections and junction boxes that are wired with the same color wires/pin locations as the traditional wiring setups you're looking for. I recommend using the 7 way connector # 54-77-003 and hard wiring your plug the way you want it setup. You can get wire by the foot (12 gauge) # 12-1-1 or (10 gauge) # 10-1-1 and a Trailer Wiring Junction Box # 3375601100 to finish off this project. This will allow you to use the proper...
    view full answer...
  • Can 6-Way on Towed Vehicle be Hardwired to 7-Way Connector on RV
    The easiest way to connect your towed vehicle to the 7-Way on your RV will be to use a cord like the Blue Ox 7-Wire to 6-Wire Coiled Electrical Cord # BX88206. This will allow you to quickly connect your tow vehicle to your RV by using the included coiled cable that features a 6-Way on one end and a 7-Way on the other. If you would rather hardwire the 6-way wires from the towed vehicle cord to the 7-Way, you can certainly do this. You will just need to make sure that you make the proper...
    view full answer...
  • Parts to Make 7-Way Male to Male Cable
    You can use Bargman 7-way plug # 54-77-003 along with 7-way cable # 54006-059 to give you a male-to-male 7-way with matching plugs. We do offer a pre-made 7-way # 50-67-210 but it is 8-feet long, not 9-feet.
    view full answer...
  • 7-Way Trailer Connector to 7-Way Trailer Connector Coiled Adapter
    No, the 7-Way wire does not go from the 7-Way to the 6-Way on the Hopkins Heavy-Duty, Coiled Trailer Connector Adapter # HM47085. What I recommend is using # WG54006-043 which is a bit longer at 6 feet but it does have all 7-Way wires running all the way through and it is ready for a 7-Way connector. For a trailer side 7-Way use # 54-77-003. For a vehicle side 7-Way use # A10-7082VP.
    view full answer...
  • Changing Trailer 4-Way Wiring to 7-Way Wiring for Extra Function and Compatible Connector to Truck
    To switch your boat trailer from a 4-way to a 7-way connector, I recommend using the 7-Way Molded Trailer Wire Connector, 6' Long # H20044 along with heat shrink butt connectors # DW05744-5. You will ground the white wire to your trailer frame using # 44-5310A and then connect the running lights, right turn/stop, left turn/stop, and reverse light. To the reverse light (yellow wire on # H20044) you will connect # 16-1-1 wire sold by the foot to lead to your trailer reverse lights that...
    view full answer...
  • Plug-And-Play Trailer Connector for 2005 Chevy Silverado
    A 5 pole round connector is really rare, with the 7-way, 6-way and 4-pole flat being the most common. Most trucks that come with an OEM trailer connector will come with a 7-way. A 6-way is sometimes found on horse trailers, and a 4-pole is the basic connector used for smaller trailers that supplies lighting circuits only. I've edited a photo for you showing an example of the plug and socket (or trailer and vehicle ends) of each of these connectors. I'd recommend fitting your truck out...
    view full answer...
  • Compatibility of a Pollak Heavy-Duty 7 Pole Round Pin Trailer Wiring Connector with Blade Connector
    The Pollak 7-pole round pin part # PK11700 is not compatible with Pollak 7 and 4-pole connector # HM40975 because it has blade style pins. What I recommend is you change your trailer connector to a 7-Way blade connector part # 54-77-003. You will also need a wiring harness like # PK11998 to install the 7/4-Way connector. It plugs into the back of the 4/7-Way. The connector mates with RV-style socket to form a weather tight seal. -Red - Left Turn and Stop - 14 gauge -White - Ground...
    view full answer...
  • Female 7-Way Trailer Connector Recommendation for Chevy Silverado
    The part # 54-77-003 is a male side 7-way connector. If you need the female side connector as well you would want the # HM40975 if your vehicle has the round 7-way socket already present. If you need to hardwire the 7-way you'd need the part # HM40975-11998 instead.
    view full answer...
  • Re-Wiring 7-Way RV Style Trailer Side Wiring Connector
    I can certainly help you re-wire your trailer-side 7-Way connector. Thanks for the photo of your connector, it helped verify the style connector and which wires you have! The attached wiring diagram will help you in attaching the wires back to your connector. Based on your photo, the only wire you don't have is the Blue wire that would be for the Brake Controller Output/trailer brakes signal. The Green wire should carry the Tail and Running light circuit, Black is 12V power, Yellow is...
    view full answer...
  • Troubleshooting Electric Jack Whose Light Works But Motor Does Not
    Thank you for detailing the issue and the testing you've done for the electric jack. My suspicion is that the jack's plug has a weak ground connection. A weak ground will pass enough power for the jack's light to function but may not pass enough current for the jack motor to operate. This is not uncommon on trailers that are a few years old and which may have developed some corrosion on the plug contacts. Check the ground and +12V contacts on the jack's male 7-way plug. Please refer...
    view full answer...
  • Wiring Diagram for a 7-Way Trailer Connector
    Of course we can help out with that. Check out the linked page which will show you exactly where each of your wires should go on connectors like the Bargman 7-Way Connector part # 54-77-003.
    view full answer...
  • How To Connect a Trailer with 6-Way Connector to a Vehicle with a 7-Way Trailer Connection
    For your 2007 Ram truck 7-way to work with your trailer 6-way plug, you simply need to use an adapter. I recommend the Hopkins Endurance Multi-Tow Trailer Connector Adapter - 7-Way to 6-Way, 5-Way or 4-Way # HM47570 which will allow you to connect your trailer to your truck without any rewiring required. This adapter will allow the center pin to be used as 12V power or brake output with a simple change in the adapter to match your trailer (see attached video). If you want to rewire...
    view full answer...
  • How to Order 38 foot Long 7-Way to 7-Way Adapter
    We have the Deka Wire - Jacketed 7-Wire # DW04914-1 which is jacketed 7-way wiring we sell by the foot. You could order it in a quantity of 38 feet and you'd get a 38 foot long section of 7-way wiring you could then wire to the 7-way connectors you need like the # 54-77-003 for the plug end or the part # HM48480 for the female side.
    view full answer...
  • Can a 6-Pole Trailer Connector Activate a Reverse Light Circuit
    I do have an option for you but there would be no way to activate reverse lights with a 6-pole trailer connector. Instead, I recommend adding a new 7-way harness using the Trailer Wiring 7-Way Upgrade Kit part # e99011. If you do not want to re-wire the trailer then you could just simply run the reverse light wire with part # 12-2-1 and then add a 7-way connector with part # 54-77-003.
    view full answer...
  • How to Determine Functions to Wire New 7-Way to Trailer
    The only way to correctly wire a new 7-way plug and lead like the Hopkins # H20042 or 7-way plug like the Bargman # 54-77-003 is to determine the functions of the wires, and unfortunately there is no kind of universal color code to tell us what wires do what. So you'll need to determine that by using a separate 12 volt battery and using that to test each of the wires on the trailer to find out what their functions are. You will ground the negative terminal and use the battery's positive...
    view full answer...
  • Troubleshooting Voyager Brake Controller Install on 2009 Dodge Ram 2500
    Since you mentioned plugging it in, it sounds like your 2009 Dodge Ram 2500 has a factory 7-way so the Voyager # 39510 brake controller will only require Wiring Adapter # 3020-P to use. The LED light of the Voyager will only come on when there is a trailer connected and not just plugging it in. If you had a trailer connected to your '09 Ram 2500 and there was no green light there are a few possible causes, although I first recommend first checking to see if all of the proper trailer...
    view full answer...
  • How to Make 7-Way Adapter with 7-Way on Either End
    What you would have to do is use the part # WG54006-043 you referenced and then wire an additional 7-way plug to the other end like the part # 54-77-003.
    view full answer...
  • Universal 7-Way Trailer Connector to Use on a Custom Trailer
    The Bargman 7-Pole, RV-Style Connector # 50-67-008 is a 22 foot long 7-way connector for use on a trailer. It's a universal product that can be used to replace an existing 7-way or added to a newly built trailer. We offer similar products in different lengths. See the attached link for our selection. If you're looking for just the connector without the lead, part # 54-77-003 is what you'll need instead. I've also attached a help article on trailer wiring you might find useful.
    view full answer...




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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Jeffrey L
Video Edited:
Andrew L
Updated by:
Laura H

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