Yah, had the same problem on the Titan? Ticor? whatever jacks and discovered that the electrical cord pin/connector was broken, easy to do .. had to replace/splice a new plug on it. It happened accidentally when moving stuff around the front.. might check that just to be sure..
Hope that helps...
You might get away with raising the other 3 jacks and slipping the truck underneath, just a thought.. I had one time where the ground sank under one jack and had to use 3 to bring it up. Take them to the max height or until it clears the bed. I'm on a Flatbed so it might not work correctly, just a thought..
Good luck but sounds like you're way past fixing it... sigh hang in there..
