1. Camper Jack
  2. etrailer
  3. A-Frame Jack
  4. 3500 lbs
  5. Electric Jack
  6. 25-1/8 Inch Lift
Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black

Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black

Item # EJ-3520-BBX
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Camper Jack
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EJ-3520-BBX - Bolt-On etrailer A-Frame Jack
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Electric A-frame jack has 2 toggle switches for operation. Jack has a retracted height of 9", an extended height of 28-1/2", and 19-1/2" of travel. Drop leg offers an extra 5-5/8" of lift. Includes a manual override handle. Call 800-298-8924 to order etrailer camper jack part number EJ-3520-BBX or order online at etrailer.com. Free expert support on all etrailer products. Guaranteed Lowest Price and Fastest Shipping for Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black. Camper Jack reviews from real customers.
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  • Reviews (749)
  • Q & A (174)
  • Videos (2)
  • Photos
  • Why etrailer?

etrailer Camper Jack - EJ-3520-BBX

  • A-Frame Jack
  • 3500 lbs
  • Electric Jack
  • etrailer
  • 25-1/8 Inch Lift
  • Bolt-On
  • 2-1/4 Inch

Electric A-frame jack has 2 toggle switches for operation. Jack has a retracted height of 9", an extended height of 28-1/2", and 19-1/2" of travel. Drop leg offers an extra 5-5/8" of lift. Includes a manual override handle.


  • Electric jack lets you raise and lower your A-frame trailer
  • Drop leg allows for increased lift and saves time when raising or lowering
    • Pin and clip holds leg at desired location
  • 2 Toggle switches on the front of the housing let you operate the jack
    • On/off switch controls light
    • Extend/retract switch controls up and down movement
  • LED light illuminates at a downward angle to help you focus on your coupler
  • Emergency crank (included) allows you to manually operate jack if needed
    • Requires a 3/8" socket to use the manual crank
  • Black powder coated outer tube
  • Zinc-finished inner tube and footplate resist corrosion
  • Simple, bolt-on installation
    • Wires to 12-volt power source
      • 12-Gauge wires
    • Serrated washer included for ground connection


  • Bracket height:
    • Retracted: 9"
    • Extended: 28-1/2"
  • Total lift: 25-1/8"
    • Screw travel: 19-1/2"
    • Drop leg travel: 5-5/8"
  • Clearance:
    • 20-1/2" From bottom of bracket to top of jack
  • Outer tube diameter: 2-1/4"
  • Inner tube diameter: 2"
  • Hole spacing on drop leg: 1-7/8"
  • Footplate diameter: 5-1/2"
  • Lift capacity: 3,500 lbs
  • 1-Year warranty

EJ-3520-BBX Ram Powered Jack w/ Footplate - Drop Leg - A-Frame - 19-1/2" Screw Travel - 3,500 lbs - Black

Video of Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black

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

Video Transcript for etrailer Electric Jack with Footplate Review

Speaker 1: Today we're going to be taking a look at the Etrailer Electric Jack with Footplate designed for use on A-frame trailers. This offers 25 and 1/8 of an inch of lift and a 3500 pound capacity. In black, the part number is EJ-3520-BBX and in white, it's part number EJ-3520-WBX.Now an electric A-frame jack like this is going to take a lot of the work out of hooking it up and disconnecting your trailer. With these big enclosed trailers, campers and even utility trailers, it can be quite heavy. Getting a manual jack, the operator lifting it up to your ball, it's just not very feasible.With this, we're able to very quickly and easily adjust the height up and down. When connected to either our vehicle or to a 12 volt power source inside our trailer.

Now on the front of the jack, you're going to have two buttons to operate it. One will be for up and down. The other's going to be for the light. Now this can be pretty handy. We've got a lens here on the bottom that shines right down on our coupler, and also out towards our vehicle so we can make our wiring connections pretty easy.Now the cover on the jack's designed to shield it from any kind of moisture or anything like that.

As the rain comes down, it hits, it's going to run off, we've got our seam around the bottom side here so we shouldn't have to worry about that moisture getting in. Also you've got a cap here, you're gonna turn it and lift up. It allows you to access the emergency override. Now in the event that you don't have a power supply or maybe your trailer's battery is going dead, we can take the provided handle, place it down and on and easily raise or lower our trailer so we can still make our connection.Now as you can see, the jack's designed to really give you a lot of lift on the front side of your trailer. So this can help with run-off and drainage on the backs so things don't sit on top.

And something else you'll like, when it gets to it's fully extended position, it just stops, we don't have to worry about overdoing it.With it in this position, we'll get a bracket height measurement that'll be right up to that mounting surface. It's going to be about 33 and 3/4 of an inch. So if we retract our footplate, that'd be closer to that 28 and 1/2 inch mark.We see fully retracted with that leg extended. We're at about 14 and 1/2, 14 and 5/8, so if we subtract the drop leg, it puts us at about 9. Now the outer tube of our jack and the plate are going to have a black powder coat finish.

While the inner tube or pinning clip and drop leg are going to have the zinc finish. Both of those are going to be great at resisting corrosion.Now not only does this drop leg help to save us some wear and tear on our jack and also us some time, but it also helps to spread the energy or the force of that jack out over a greater area. This can be really important when we're on softer surfaces and prevent it from sinking into the ground.Now another measurement to keep in mind will be from the top of our bracket here to the very top of our jack, we've got about 20 and 1/2 to 20 and 5/8 of an inch. You just want to make sure if you have anything overhanging, you've got enough room for that to fit in.Now to begin your jack installation of course, you'll want to remove your old jack. Save the hardware with that though. The jack doesn't come with it, so you'll want to have that handy. Then we'll just remove our footplate here, set to the side and we'll be ready to drop our tube down through. Now this is a two and a quarter inch outside diameter tube. So you just want to ensure that your holes large enough to accommodate that, and you should have your triangle shape bolt pad in there. It's pretty standard on A-frame trailers. It's going to bring that right down through and line those up.Now if you don't have hardware already existing or if you need to replace it if yours is damaged, you just want to ensure that you're using a 3/8 inch diameter bolt that needs to be at least a grade five. As long as you meet those requirements, you'll be in good shape. You see ours had a lock washer on it. I'm gonna keep that and then we're gonna place on our flat washer. The flat washer's provided with the jack as well as the star washer. That's gonna go underneath that flat washer. When we tighten it down, it's gonna penetrate that paint, so we get a good ground. We're going to do that in all three of our locations. Now we're going to torque our fasteners down to the specifications listed in the instructions.Now once we've got our jack nice and secure, we now are going to move onto wiring it up. You'll see they give you a good length of wire here. What I like to do is run this along with my seven pole. You can there are a couple zip ties already on there. It really uses many zip ties as you need to keep everything nice and secure.Now you can get power for this from two ways. If you're using it on a camper or an enclosed trailer, something that already has a battery on board, you can just run this to your battery. It's going to be grounded here so everything should work as long as your battery is grounded. If not, if you don't have an on-board battery, you can do it right off the power coming through your vehicle through your seven pole plug. Ours runs to a junction box. The wire coming out of the junction box is here and that'll provide the power that we need when we're hooked up. So, if you have the option to hook it up to the battery, I recommend doing that, then you'll always have power. If you don't have a battery on-board, you'll only have power to the jack when this is plugged into a truck with a working 12 volt power outlet or any vehicle for that matter with a working 12 volt power plug coming out of it.Now the extra wire, I've just coiled up here at the base of the jack, really keeps it out of the way, not really too much of an issue, and then you'll have extra if you ever need to change it or make any modifications. We're going to run that to our power wire here. So let's cut them off to the appropriate length. We're going to get both sides of that stripped back and we're going to use a butt connector to connect 'em, this is part number DW05745. It's a heat shrink butt connector. Since this is going to be out in the elements, it's a good idea to use the heat shrink just to protect it from the moisture. Got both sides of that crimped down, and then we'll use a heat gun, a mini-torch or a lighter and get that shrank. Just going to apply a little heat at a time here and you'll see that start to shrink down around the wire. Once you have it fully shrank, almost looks like your wire magnifies a little bit.Now we'll just use a couple more zip ties. Make sure our wires are nice and tight so they don't get hung on anything. You see on our drop leg here, we've got four holes to choose from. This one will have it in it's highest position. That's going to be more of a stored position. But this gives us four holes with an inch and 7/8 between 'em for a total of 5 and 5/8 inches of adjustment. That's just going to save wear and tear on our jack and the time we have to have it operating. We can get that down and then use our jack a little bit more quickly.Now we'll take the provided pin and clip. You just want to set your drop leg where you like it, bring that through and then secure it with the clip there. And as you can see, that's drastically going to reduce the distance our jack has to travel. Now we'll hook it up to our vehicle as you can see here so we have power, run the jack on down and support it.That's going to complete our look at the Etrailer Electric Jack with Footplate.

Customer Reviews

Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black - EJ-3520-BBX

Average Customer Rating:  4.7 out of 5 stars   (749 Customer Reviews)

Electric A-frame jack has 2 toggle switches for operation. Jack has a retracted height of 9", an extended height of 28-1/2", and 19-1/2" of travel. Drop leg offers an extra 5-5/8" of lift. Includes a manual override handle.

- EJ-3520-BBX

Used it for about 5 dry camping trips last summer with my 24' toy hauler. Works fine, has plenty of power to lift the tongue off the trailer hitch even when it is somewhat bound to the hitch ball. Bought a cover to keep it covered and out of the high elevation sun. It sure saves a lot of manual labor fighting with the manual hitch crank. 730284

- EJ-3520-BBX

Well, we installed the electric tounge jack on our new Coleman camper and it worked perfectly. Easily installed, perfect for our trailer. Can't wait for Spring! 576113

Awesome, make life good again!
Peter - 10/21/2019


- EJ-3520-BBX

What a easy upgrade for your camper. I ordered and received in a few days. etrailer just does it right. Install was so easy, anyone can do it. No more cranking for me, push the button and like majic, you can take your trailer up or down. I also purchase the cover to keep the weather of the motor and controls. It is nice too. Thanks Lisa D for your great service. 496356

- EJ-3520-BBX

After purchasing a small camper and using the hand crank jack two times that I would look for an electric jack to replace it. Many of the jacks cost more than I wanted to spend. Then I found "etrailer.com". The prices were reasonable. I ordered Item EJ-3520-BBX electric jack. I have had it for a year now and have used it many times. I truly a happy camper. It has saved me time and energy. My wife can operate it and has no trouble letting me fish while she breaks camp with no help at all. The follow up service is great. Check "etrailer.com" before you buy any where else. 566675

It is still doing great.
Samuel L - 09/19/2019


- EJ-3520-BBX

My electric trailer jack came at noon today. Got home from work at5:30 and had all hooked up and running in 25 minutes! Easy to install! Was worried about the motor head being too tight against propane bottle cover...but it fit perfectly!Runs super smooth so far. I put up with a hand crank tongue jack for far too long. Seems like a good product for a reasonable price!! 394253

- EJ-3520-BBX

I just installed this jack. The installation went easy but I did need a hammer to get the jack past the bottom hole in the trailer mount. Hook up to the battery was easy, just crimp on a ring terminal and connect it. I don't think this jack is very weather proof so I covered it with a canvas and suggest this is a necessary step. Only time will tell how it works long term but the price for this unit is very competitive and the jack seems well made. It was important to me to have the ability to raise and lower the jack manually and this is an option on this jack. 435649

I have had my trailer out a number of times in the past year. The jack has worked flawlessly. The only down side is my tailgate will not lower all the way with the trailer hitched up. It means I have to do a bit of preplanning but other wise its not a problem. I still keep the jack covered and suggest this is necessary for long life.
Ed B - 09/23/2018


- EJ-3520-BBX

I installed the jack in about 10 minutes. It works great. I would recommend this to anyone who needs a good jack without spending a lot of money. The service was great also and I will be buying from etrailer again if I need anything. Thanks! 393024

The jack is hanging tough and working great
Bob N - 06/14/2018


- EJ-3520-BBX

This inexpensive travel trailer jack arrived after only two days via UPS. Securely packaged. It is truly a quality item! Very easy to install and works great. The manual handle is a bonus in the event it is ever needed. Be sure to follow the instructions making sure the three screws on the plate are solidly grounded using the supplied star washers. I can honestly say that this jack is one of the best items I've ever bought for my RV. Thanks etrailer! 480612

Still working great after a year. Im using the black vinyl cover, although the jack appears to be resistant to weather.
John M - 03/03/2019


- EJ-3520-BBX

Excellent product! This was super easy to install, took longer to look up what wire I needed to connect the jacks power lead to on my trailer that it did to do the actual install! This thing works great and has made life so much easier for my wife, hooking and unhooking our 7x16 cargo trailer is a breeze now, she often does craft shows. If I had another trailer I'd buy this jack again. 446201

- EJ-3520-BBX

I have installed the tongue lift on my camper . It fit perfectly and it operated just fine . No problems so far . I used a small battery clip on the hot wire from the lift and when I need to use it I simply clip it to the 12 volt battery on my camper . The way my camper is wired the ground wire from the camper to the battery has to be hooked up in order for the lift to operate . But I am very happy with it so far . By the way what is the warranty on the lift ? Sending pictures also of installation . 471421

Douglas, this product is covered by a 1-year limited warranty.
-- Laura E - 01/31/2018


- EJ-3520-BBX

Customer Service is number 1!! Mr. George is awesome on ensuring you receive the product and are satisfied. I had the electric jack installed in less than an hour. That included reading instructions, acquiring the tools, running electrical check for hot wire, and replacing the tools. I used the electrical box under front of the trailer for the power. To ensure I would not chaff the wire, I selected a hole in the box and drilled it to 3/8". I then drilled a hole in a valve stem cap so the wire would slip through the valve stem cap. I then pushed the cap into the hole and wired to existing electric wires with wire cap. 491854

- EJ-3520-BBX

We at Cariboo RV Mobile Part Service & Repair bought 2 of these Electriic Jacks (EJ-3520-BBX) and have sold them, nice product... Thanks etrailer... 442049

My camper jack is great, still working as good as new.... thanks so much...
Denise Y - 10/13/2018


- EJ-3520-BBX

The Ram jack was very easy to install and hook up!! The motor runs super quite and has plenty of power to raise and lower our camper trailer. Only thing wrong with it was the plastic housing has a crack in it which I think happened in shipping. 394778

- EJ-3520-BBX

Received yesterday and had it mounted within half hour after delivery. Very simple installation and works great. Arrived just in time for leaving today for two weeks camping. I have bought from you people before and have never been disappointed with your service or delivery. Thank you. 441191

So far so good. The electric jack stand has held up very well this past year. Highly recommended
Bill S - 10/10/2018


- EJ-3520-BBX

I installed this jack about two weeks ago on a 22' travel trailer, and have only used it 3 or 4 times. This is the first electric jack I have owned. It was a breeze to install, only took about 10 minutes to replace the manual jack. If I would have known how easy they were to install I would have replaced my manual jack several years ago. I didn't rate it 5 stars because it operates slower than I expected, (may be normal) and I originally had trouble getting the jack to work. Seemed to be stuck or the gears out of sync. I took the manual crank and worked the jack back and forth a few times to get it going. Works good now. For the price I'm very satisfied. Only time will tell how the jack holds up, but if I can get 3 years or so out of it I will be happy. Sure beats cranking the trailer up and down by hand. I had a an old laptop case that I am using to protect the motor unit from the weather and it seems to do the job. 489608

Still very satisfied with this jack. After one year of moderate use I have had no problems. Its so much easier than the manual crank type. Thanks ETrailer!
Tom F - 03/27/2019


- EJ-3520-BBX

The old jack on our tent trailer (2" outer pipe) was getting harder to crank, and just didn't have the reach of this 12v powered jack I read about in an eTrailer email. I felt somewhat sure of the measurements and ordered it. It came on the third business day which was terrific as we're headed on a 5,000 mile odyssey up to Maine and through New England starting three days later. I rechecked the measurements, and note that, without the footplate, the lower level is 7" with about an additional 1-1/8" reveal of the inner 2" pipe. Installation was basically easy, and the holes lined up perfectly to re-use the original bolts along with the furnished washer hardware. In my case, the lower plate was LESS THAN 2-1/4'' and I spent a few minutes cutting with a Dremel tool to accommodate the lower pipe. The electrical hook-up was simple. I normally leave the negative connection to my battery detached, and this unit won't work without it re-connected since it grounds the frame. The upside of that is that you don't need to have an inline switch to thwart mischief, simply disconnect the negative cable to your trailer battery. This unit gives me much more range of height, the motor is powerful and quiet, and moves at a reasonable pace. The included footplate adds more height, but I'll use a short, flat one as a matter of convenience. Everything was as described, except for the measurements. I'd note that the top box is a full 8" deep. For us, that means I can't open the back gate of the tow vehicle when attached, but we'll change our discipline and put last minute items in the storage area of the trailer. Well done, eTrailer! 441983

A year later, the electric jack has worked flawlessly for us over the past year. I still give the unit a 5-star rating and enjoy the solid performance of the electric trailer jack.
Brian i - 10/13/2018


- EJ-3520-BBX

I checked out a lot of reviews before buying this jack. Part of my decision was based on the price point and that it has a higher lifting distance than some of the others. Installing the jack was a snap. Just mount the trailer on your trucks hitch for temporary support during the change over and you're off to the races. The bolt pattern matched the old manual jack so no issued there. Even with the washers that come with the electric jack my original screws were still long enough (you will need to reuse yours, the electric jack doesn't come with any). I simply zip tied the wire to the existing wire bundle under the A-frame. I did buy a ring kit to attach the end of the power wire to the battery properly. I did not cut any length from the wire as some reviewers had advised. Just coiled up the excess. The jack worked right away. I think I heard my aging shoulder breath a sigh of relief. Afterwards. I did order a cover for the electric jack head. I figure the unit will last longer if the sun isn't always burning down directly on it. So far, I would recommend this jack. Time will tell. 543425

- EJ-3520-BBX

Would have to say 4.5 on the rating only because of the installation instructions. On installation instruction #4 it tells you how to assemble the hardware and then directs you to a figure above. This figure is nothing more than the plain jack. Then it tells you on #6 to position the fuse holder as close to the power source positive terminal as possible. The fuse holder comes in already attached to the jack adjacent to the jack control switches. Ease of installation other than above. Common sense will get anyone past those directions. Jack operation was perfect after installation. Test of jack showed it works as advertised and I can't wait to use it in the upcoming camping trip. Ordering, customer service and shipping/receiving was excellent. I was informed on the delivery date and status of shipment by ETrailer to whole time. Properly packaged and the unit came in in excellent shape with no defects. As you can see in the pictures it is a clean install and I added a very nice cover which was also sold through E-Trailer. Another nice product to finish a successful installation. 379431

- EJ-3520-BBX

Installed the new RAM electric tounge jack on my enclosed car hauler trailer. Very happy with this unit. Quick install, like the adjustable foot pad, and operated smoothly. etrailer packages well and deliveries quick. 500199

Working great. No problems to report. Highly recommend this product and your business! Thanks
Gary D - 04/24/2019


- EJ-3520-BBX

I bought this jack after doing a lot of research. The conclusion I came to was that most of these electric jacks are basically the same design with a different name stamped on them. I like how this one has an inline fuse, a higher lift range, and an adjustable footplate. I read a lot of forums, Facebook pages and reviews on a variety of websites. Etrailer offered the best option for what I was looking for. This jack is well made. It's heavy and solid. It was super easy to install. If you can't install this, you probably shouldn't be pulling a trailer. It was literally 3 bolts and a ring terminal. The wire lead does not come with a ring terminal attached. You have to add your own, which is no big deal. It comes this way so you can cut the excess wire to fit your application. It also came with 3 washers and 3 star washers to ensure a good ground connection on the wiring. The light is super bright as well. Etrailer kept me up to date the whole way through the ordering and shipping process. This was my first purchase from them and it was a great experience. 438735

- EJ-3520-BBX

I put the RAM hitch on the trailer and did not have any problems. Bolted in place and hooked the electrical up without any issues. I have not taken the camper out yet because of rain, but tried the light and up/down on the hitch and seems to work fine. Service at etrailer is very good. The only reason I did not give five stars is the instructions for installation are not very good. They tell you to refer to a picture and the picture is not there. It also tells you to install the fuse holder as close to the battery source as possible. However, the fuse holder is already in line and close to the unit. Minor issues as it is simple to install. One call to etrailer to check about the placement of the fuse holder and good to go. 523903

Matthew - 06/19/2019


- EJ-3520-BBX

Great customer service. After receiving a damaged unit on Tuesday the 26th, I called and spoke to Sal and emailed him pictures of the damages. Also they had originally sent a white one but I had ordered a black one. They immediately shipped a new black undamaged unit and I just received it on the 29th and got it installed. The damaged unit is on it's way back to E trailer. I have purchased many items from Etrailer and am very pleased with their service. 463641

I had to enlarge the hole in the tongue with a rotary file but after that the installation went well. Have used it for about 6 trips now and dont know how I ever did without it.
Jerry H - 12/29/2018


- EJ-3520-BBX

The jack was not well put together. Some screws on the motor cover were falling off and the LED light was loose in its housing. The housing itself was installed incorrectly. I had to take it apart to put it together properly. Also, the cable where the fuse connection is was exposed. I used electrical tape to seal it. Not good for something new! After that mess the install was pretty simple. The jack lifts my trailer easy enough. On paper, this is the only jack that has long enough travel and drop leg to level our trailer on our driveway. The black also matches the trailer well. Time will tell if it holds up to normal use. It's on a Winnebago Micro Minnie 1706. 395461

- EJ-3520-BBX

This was an excellent choice. It has lifted the tongue of my very heavy 16 ft enclosed trailer, fully loaded with approx 7000 lbs, many times. It has never failed to operate just as it should. And, the price was excellent. Pushing the button versus cranking a jack is a no brainer. Would buy again without hesitation. 571933

- EJ-3520-BBX

It took way to long to come ,due to a back order , not etrailer fault. but then when it did come they actully put a screw in with no threads i never sen anything like that so i took a old screw from my old unit. and replaced it. i wasnt happy when i seen thay had a white one same thing but white for 116.00 and i paid 144.00 I actully told them after waiting I wanted the 116.00 one I think I should have got it or at least had the price reduced. im only writing this review because ui got a letter askig em to and i speak the truth period 545114

Show More Reviews

Ask the Experts about this etrailer Camper Jack

  • Wiring Electric Jack to Plug Into 7-Way on Tow Vehicle
    Although wiring an electric jack like the etrailer.com # EJ-3520-BBX you referenced to a dedicated battery on the trailer is the preferred solution for ensuring you get the needed power, you can indeed wire it to a 7-Way plug like # A7WCB for it to be connected to the 7-Way on your truck when needed. If you don't yet have an electric jack, we actually have a 3,500 pound unit available with the Buyers Products # 3370093500 that is designed to be used this way right out of the box. This...
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  • Replacement Cap for RAM Electric A-Frame Trailer Jack
    For the replacement cap that will cover the manual override on your Electric A-Frame Jack # EJ-3520-BBX, you will just need the Replacement Cap # EJ-3520-BCP. This will include one cap for your jack.
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  • Recommended Electric A-Frame Trailer Jack for 2011 Open Range Journeyer 340FLR
    Tongue jacks are often rated higher than the weight of the trailer tongue they will be supporting. For tongue jack to meet your needs, I recommend the etrailer.com Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black # EJ-3520-BBX. This jack will mount to the same location on your trailer tongue A-frame and will give you a drop leg as well as a really nice LED light on a separate switch to help with connecting or disconnecting. If you want what I consider to be the best...
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  • Electric A-Frame Jack Recommendation for Jayco Jay Flight Travel Trailer
    For a Jayco Jay Flight travel trailer that weighs 6100-lbs dry you will want an electric tongue jack rated as high as possible to ensure the jack does not have to work too hard; this will help it provide a longer service life. All of our bolt-on a-frame electric tongue jacks are shown on the linked page. These offer varying amount of lift, from 14- to 25-inches. We offer a great-value option in parts # EJ-3520-BBX (black)and # EJ-3520-WBX (white). This jack has 3500-lb capacity, 25-1/8-inches...
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  • Can the Electric Jack w/ Footplate # EJ-3520-BBX be Connected to 12V Circuit on 7-Way
    You can use the 12V circuit on your 7-Way to power the Electric Jack w/ Footplate # EJ-3520-BBX but it is usually best to use a separate 12V battery that is stored on your trailer. Reason being that sometimes the trailer jack needs more power than the 12V wire from your tow vehicle can deliver. Is it possible, yes, but if that isn't enough power you will need to add a battery to your trailer. We do have the Buyers Products Jack # 3370093500 which you can plug right in to your 7-Way...
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  • Troubleshooting Ram 3,500 lb Trailer Tongue Jack Working Intermittently
    I reached out to my contact at Ram and he said that their electric jacks, like part # EJ-3520-BBX, # EJ-3520-WBX, or # EJ-3527-BBX have one fuse and it is located on the black wire where it enters the housing. From what you described I believe your problem is a bad ground. These jacks ground through the mounting hardware so if the connection isn't solid and constant it can cause the issues you are having. What my contact recommended doing was taking some of the paint off of the trailer...
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  • Recommended Electric Tongue Jack For Toy Hauler
    For your toy hauler, I recommend the Electric Jack w/ Footplate - Drop Leg # EJ-3520-BBX. This jack has a 3500 lb capacity and will lift 25-1/8 inches total. That lift is including a 5-5/8 inch drop leg travel. It has the outer tube diameter of 2-1/4 inches to fit your A-frame's jack hole diameter. If you are interested in a jack that requires less power draw and uses a low-friction ball screw to reduce wear, I recommend the Husky Brute # HT87247. This jack will also fit your application...
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  • Determining the Correct Electric Jack for Jayco 22FB Trailer
    There are no obvious cons to having an electric jack as opposed to a manual jack and most people prefer an electric jack due to its ease of use. As for what electric jack you need for your Jayco 22FB, that is going to depend on the diameter of the jack hole; it will need to accept the outer tube diameter of the jack. For example, the Ultra-Fab Electric A-Frame Jack # UF38-944017 has a 2" outer tube diameter, the etrailer Electric Jack # EJ-3520-BBX has a 2-1/4" outer tube diameter and...
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  • Availability of Wiring Diagram for the Replacement Power Switch # EJ-3520-PSW
    I am attaching a picture of the Replacement Power Switch # EJ-3520-PSW when it is properly installed on the Electric Jack w/ Footplate # EJ-3520-BBX but unfortunately there isn't a wiring diagram available. If you be mindful to note which position each wire is supposed to be in when you disconnect your current switch you simply just have to install this switch in the same way.
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  • Troubleshooting Ram Electric Jack Lights Working But Jack Not Operating
    If the light on your Ram Electric Jack w/ Footplate # EJ-3520-BBX is working but the jack motor is not actually getting any or enough power to operate, I first recommend checking to make sure the power source is good. Make sure the battery you are using is fully charged and in good condition. If the battery is good, check to make sure you have a solid ground connection to a clean, bare metal surface. A weak ground might be allowing for just enough power to reach and power the lights, but...
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  • Powered A-Frame Jack Recommendation for 2017 Keystone Passport 2670BHWE
    My favorite powered jack to recommend is the Husky Jack part # HT87247 as it has bearings in the screw which allow it to operate quicker and smoother. It also shuts off automatically before topping or bottoming out. Other jacks will allow you to go too far with the jack but in doing so you damage the threads of the screw. It has a lifting capacity of 4,500 lbs which would be more than you'd need but will ensure that the jack will operate quickly and last a long time. If you are considering...
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  • How to Replace Power Switch on RAM Electric Jack w/ Footplate
    It sounds like you have either the Electric Jack w/ Footplate part # EJ-3520-BBX or the Electric Jack w/ Footplate part # EJ-3520-WBX. If that is the case then the Replacement Power Switch part # EJ-3520-PSW is the correct replacement for you. In order to replace the switch you need to take a flathead screwdriver or pick and pry the top and bottom of the switch to release it from the housing. You can then unplug the spade connectors from the old switch and into the new switch making sure...
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  • Fuse Location on etrailer.com Electric Jack # EJ-3520-BBX
    On the etrailer.com Electric Jack w/ Footplate # EJ-3520-BBX that you referenced the 30 amp barrel fuse like # EJ-FUSE is located in a flared opening right where the black power wire comes out of the motor housing. It is very easy to access and replace if the need arises. I have attached a short video demonstration on this jack that you can check out as well.
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  • Is the Electric Jack w/ Footplate a Good Replacement for An Old Atwood 2,500 Jack With Bad Motor
    The Electric Jack w/ Footplate part # EJ-3520-BBX is an excellent option to replace an Atwood Electric Jack at a very good price as well. It has a 3,500 lb weight capacity which would be plenty for you needs and the higher rating you go with, the longer the jack will last as it does not have to work as hard. The Atwood Electric Jacks are quality options but most of the older models are hard to get replacement parts for. If you have an older model you would be better off to just replace...
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  • Availability of Wheel to Use on etrailer.com Electric Jack w/ Footplate # EJ-3520-BBX
    The etrailer.com Electric Jack w/ Footplate # EJ-3520-BBX referenced in your question features an inner tube diameter of 2 inches. With this in mind, the Replacement Heavy-Duty 6 Inch Caster # BDCP555 will work well to replace the footplate on the jack, since it is designed to fit 2 inch jack tubes. Keep in mind though, that when using the wheel on your jack, its 3,500 pound capacity will be reduced to the 1,500 capacity of the wheel. This is simply because the trailer jack will be limited...
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  • Replacement Housing Assembly for etrailer and Ram Electric A-Frame Jack
    Yes we do! The replacement housing assembly for Electric Jack # EJ-3520-BBX is the Replacement Cover, Cap, and Lens for etrailer and Ram Electric A-Frame Jacks # EJ-3520-BCV.
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  • Replacement Parts Available for the eTrailer Electric Jack with Footplate
    If you are referring to the Electric Jack w/ Footplate part # EJ-3520-BBX for black or part # EJ-3520-WBX for white then yes, we do have the correct replacement extend/retract switch and for this you will want to use the Replacement Power Switch for RAM Electric Trailer Jack part # EJ-3520-PSW. We also have several other replacement parts which I have attached for you below. Replacement Light Switch for Electric Trailer Jack with Footplate - part # EJ-3520-LSW Replacement Cap for Electric...
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  • Can 7-Way 12V Power Feed Operate High-Capacity Electric Winch
    The 12V power circuit in standard 7-way trailer wiring is typically limited to about 30-amps current. This is enough to operate a trailer's electric A-frame tongue jack, like # HT87247 or # EJ-3520-BBX, but it may not be even close to the power needed by a high-capacity winch. For instance, the Bulldog Trailer Winch # BDW15020, rated for 4400-lbs, will draw at full load well over 300-amps of power! This requires a dedicated trailer-mounted winch battery of at least 650 cold cranking...
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  • Does etrailer.com Electric Jack w/ Footplate # EJ-3520-BBX Have Fuse
    Tthe etrailer.com Electric Jack w/ Footplate # EJ-3520-BBX that you referenced has a 30 amp barrel fuse like # EJ-FUSE which is located in a flared opening right where the black power wire comes out of the motor housing. It is very easy to access and replace if the need arises. Hopefully it's just a fuse that blew and you didn't damage the threads of the screw which is common when over extending powered a-frame jacks.
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  • Replacement Fuse for etrailer.com Electric A-Frame Trailer Jack
    The etrailer.com Electric Jack w/ Footplate # EJ-3520-BBX has a 500V 30 amp fuse that is a bus style fuse. You can use the Replacement Fuse for etrailer or Ram Electric A-Frame Jack - Qty 1 # EJ-FUSE if that fuse goes bad.
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  • Best Value Electric Trailer Jack For Toy Hauler Trailer
    The etrailer.com electric jacks part # EJ-3520-BBX and part # EJ-3520-WBX are the most valuable option for your money. The etrailer.com jacks are manufactured by RAM industries which is a very dependable and well known trailer jack manufacturer. They also will provide you with 28-1/2" of lift with 3.5K capacity and smooth operation and they feature LED lights that allow you to hook up your trailer more easily at night.
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  • Capacity Needed for A-Frame Trailer Jack On 6,200 Pound Camper
    An electric A-frame trailer jack like the etrailer.com # EJ-3520-BBX that you were looking at just needs to be able to lift a trailer's tongue weight. The tongue weight of a trailer should be around 10 to 15 percent of its total weight, which likely puts the tongue weight of your 6,200 pound trailer at around 620 to 930 pounds. With this in mind, a jack like this that has a 3,500 pound lift capacity is more than enough and will work great. It's always a good idea to use a jack that...
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  • Can etrailer.com Electric Jack Be Rotated to Allow Clearance for Truck Tailgate
    The motor housing on the etrailer.com Electric Jack # EJ-3520-BBX can't by itself be rotated but you could certainly spin the entire jack around on the trailer since the mounting holes are asymmetric. This should hopefully give you the needed clearance to drop your Ram's tailgate. Another option is to leave the jack how it's installed and replace your existing ball mount with a longer one such as the Curt # D-26 that measures 12-5/8 inches from the center of the pin hole to the center...
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  • Replacement Cover for RAM 3,500 lb Electric A-Frame Jack
    If your RAM jack has the same design as the 3,500 lb etrailer.com jack # EJ-3520-BBX (a rebranded RAM jack), then the replacement cover is part # EJ-3520-BCV on our site.
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  • Is etrailer.com Electric Trailer Jack # EJ-3520-BBX Weather Resistant
    The etrailer.com Electric Jack w/ Footplate # EJ-3520-BBX that you referenced does feature a zinc-finish inner tube and footplate along with a black powder coat outer tube and plastic housing that allows it to be weather resistant. It is designed to be used and stored outside. With that being said if you plan on keeping the jack out in the elements year round I do recommend adding the Ultra-Fab Cover # UF38-944020, which is not included. This will slip over the head of the jack to protect...
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  • Recommended Electric A-Frame Tongue Jack for 2017 Jayco Jay Flight SLX Travel Trailer
    Trailer tongue jacks can be rated for well under the trailer's actual weight since they never have to lift the entire trailer, only the weight of the tongue area at the coupler end. Usually in a properly-loaded trailer this will be between 12% and 15% of the trailer's total gross weight (GVWR). Since your 2017 Jayco Jay Flight SLX A-frame travel trailer has an unloaded tongue weight (TW) of 710-lbs we can estimate that when fully loaded the TW will be more like 1000-lbs. For this weight...
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  • RAM Trailer Products EJ-3520-BBX Black Electric Trailer Jack with Leg 3500 lb Replacement Light
    For the etrailer.com trailer jack part # EJ-3520-BBX the replacement light is the light board part # EJ-3520-LT. If you pull off the front lens of this you'll see how the old light comes off and how to install new one.
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  • Can the Head of the Electric Jack # EJ-3520-BBX be Rotated
    The head of the Electric Jack w/ Footplate # EJ-3520-BBX unfortunately cannot be rotated. Before drilling new holes though I would unbolt the jack and try rotating the whole jack to line up with the same mounting holes and see if that allows your tailgate to come down.
    view full answer...

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Info for this part was:

Edited by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Video Edited:
Jacob T
Installed by:
Cole B
Installed by:
Randy B
Updated by:
Sarah W
Updated by:
Hannah L
Updated by:
Mike S
Written by:
Amanda M
Video by:
Zach D

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