How To Install An Electric Tongue Jack On A Trailer

Install An Electric Tongue Jack On Your Camper/Trailer

Electric trailer tongue jacks are really easy to install and a huge upgrade from manual hand crank jacks.

They can save you a lot of work and most even come with LED lights installed to help you when hitching and unhitching at night.

If you live in your trailer full time or have a work trailer that you hitch and unhitch all the time getting an electric jack is going to make life easier.

How It’s Done

Step 1: Buy the Correct Size of Power Jack

Installing a new power jack for your trailer should be a simple process if you have bought the right size.

The standard tube diameter for a-frame trailer jacks is 2.25 inches.

All of the power jacks on my best electric tongue jacks for trailers have that diameter. If it’s a special size you may need to order a custom electric jack.

Measuring the top of a trailer tongue jack for replacement with a electric tongue jack
The outer tube of this trailer’s tongue jack is 2.25 inches which is the standard

You can buy power trailer jacks for tongue weights from 3,500 to 5,000 pounds, which means there’s an electric jack for almost any size and weight of bumper pull trailer. Safe tongue weights are no more than 15% of your gross trailer weight (GTW).

That means even the lightest-duty power trailer jack (3,500lbs) can take GTW of up to 23,333 lbs. My 31-foot travel trailer has a max GTW of 9,000 which means a 3,500 lbs electric tongue jack is more than enough.

To measure your trailer’s tongue weight so you know if you have it loaded down safely you can get a trailer tongue weight scale or use a do it yourself method using only a bathroom scale.

This method only works on a lighter trailer. If you have a heavy-duty work trailer you will have to buy a scale.

Step 2: Take Weight Off Of The Trailer Tongue Jack

The next thing you need to do before you start removing things is to get the weight off of the front jack of the trailer. Do not use the front stabilizer jacks to do this.

The easiest way is to hitch it up to your tow vehicle, that way the weight is off and your trailer is secure.

Another option is to put the weight of the trailer onto some heavy duty jack stands (click to view on Amazon) just make sure you are using wheel chocks so your trailer won’t roll while you’re working on it.

Step 3: Remove The Old Tongue Jack

Removing a jack on an a-frame trailer is easy. Just remove the 3 bolts on the mounting plate of the jack.

The tongue jack on the front of a travel trailer
The new electric tongue jacks holes should line up with the old one.

Step 4: Bolt In The New Electric Jack

Once the old jack is removed just line up the electric jacks mounting plate with holes already in your trailer’s A-frame. Make sure the power jack’s electrical housing is facing forward or to the side if the option is available.

The reason you may want to turn the heat so it faces sideways is to make room for the tailgate of your truck. Certain travel trailers and truck models have less space on the hitch or taller tailgates which means the top of the electrical tongue jack can sometimes get in the way.

Step 5: Electrical

If your jack is powered by a 7-way plug you are now done with the installation process. If your jack just has two open wires you will need to crimp on a battery eyelet terminal.

The wire is normally 10-12 gauge and the eyelet should have a 5/16 stud hole.

Because these connectors can be out in the elements getting an eyelet terminal with heat shrink as well is a good idea. A pack like this one will have everything you need to make a good connection for your electric jack.

Once you’ve installed the eyelets you can either connect your electrical tongue jack directly to your battery or you can connect it to the electrical junction usually located under the tongue of the trailer. It should look like this.


Electrical junction located on tongue of the trailer
Electrical junction located on tongue of the trailer

To connect just lift one of the red rubber protectors and bolt in your cables. Make sure you connect the right wires to the right spot. Grounding wire to grounding wire, hot wire to hot wire.

Once you’ve got it connected you should be able to turn on the power using a switch located on the jack. If you can move the jack up and down using the up/down switch you are good to go.

Have any questions about installing an electric trailer jack? Leave a comment below.

by Jesse
Jesse has always had an interest in camping, technology, and the outdoors. Who knew that growing up in a small town in Sweden with endless forests and lakes would do that to you?

2 thoughts on “How To Install An Electric Tongue Jack On A Trailer”

  1. Not to be a crazy person, but shouldn’t you hook the trailer up to the truck before you remove the jack???? It was never mentioned in your description!! Or were we just supposed to assume that??

    • Hey Tom,

      You’re so right, I suppose I meant it to be implied but I see now it should be added to the steps for clarification. Thanks for the input.


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