Power Tongue Jack only goes up

I honestly don't remember what brand jack I have but it had the same issue.

I found that my jack uses two micro-switches as limit switches. One of them failed. The jack manufacturer wanted over $30. I bought a new switch at the local electronics supply house for $2.50.

I suggest buying two while you are there. I installed the two new switches and tossed the good old switch in the junk drawer for a spare.

You should be able to pry the switch out by using a flat blade screw driver under the lip of either the top or bottom flange.

That is a fairly simple switch. Here is a replacement 25 amp switch. You would have to change the wire connections to use it as this has six blades versus the original that has four blades and jumpers. For $45 difference, I would change the connections.

Also eliminate ground problems. Most of these jacks ground through the mounting bolts. Make sure you have a good ground with no corrosion.

With no load, (going up) the jack may get by on a so-so ground. When under load the so-so ground isn't enough.

Mine ( I don't know the model # ) has a plastic cover on the head with 4 Philips screws. Under there is a plate retained by more Philips screws. IRRC you will have to remove the ground wire to lift the plate then you can access the switch area. Don't forget to remove the fuse. All the wires will be live.

I thought about loose or broken wiring,but it seems to be fine. The light works and the jack lifts up...just won't go down. Wondering how difficult it would be to get inside to replace the switch. Might be easier to take coolbreeze01's advice and just buy a new jack. Thanks for the input!

Before ordering a new switch check that the wiring is in good repair, may be a loose or broken wire. If you need a switch try a trailer supply/repair shop first, cheaper than $50.00. I think mine was around $20.00.

For $100 you could get one of these: RAM Electric Trailer Tongue Jack 3500 lbs. Mine is quiet and works just fine.