Tongue jack power not working

[gpearson26]

My tongue jack motor seems to only work when connected to the truck or power source like my house or camp site. Any suggestions?

[wiscampsin]

Look behind the tongue battery box for a 30AMP fuse holder and check the fuse. It might be closer to the camper but looks something like this.

[gpearson26]

I’ll check that out. Thanks.

[Sundancer330]

Check your battery voltage, if the fuse was blown I dont think it would work when plugged in.

[gpearson26]

Everything but the jack seems to be working on battery power so there’s something happening with the jack itself. I’ll check the fuse underneath as suggested but open to any other thoughts.

[gpearson26]

The light on the jack also doesn’t work. I’m still learning and don’t know how to check battery voltage.

[RogerR]

While you are checking everything look at the negative ground. Most ground via the bolts that hold the jack onto the frame. If there is to much rust, corrosion or paint the ground may be bad so current won't flow easily. The extra voltage from the truck or converter may overcome the rust. Pull a bolt, clean the contact surfaces and reinstall.

[mrSethTaylor]

I haven't chased it down yet but I believe it is wired to only work when connected to the truck. Not sure the reasoning except to keep people from messing with it or something. Mine is the same way - its a little annoying....

[gpearson26]

It usually works fine without being connected. For whatever reason it stopped.

[gpearson26]

I’ll take a look but the trailer is only a couple months old so there shouldn’t be any rust. But I’ll try to look closer at the ground wires

[Jim Davis]

Probably not the problem in this case, but the inline fuse on the outside of the jack isn't in a waterproof holder. I have had to open mine, dry it and clean the fuse there and the contacts due to rust. Just one more cheap thing to check periodically.



I did go to a boating store and bought a waterproof holder.