I'm gonna guess if the +/- were connected backwards, it took out at least the regulator.
I had an area between buildings 25 x 65ft that over the years became sod when dry and mud when wet/winter. Needed to occasionally drive pneumatic tire forklifts thru there, and that was OK....when
dry. Not so good when wet. Finally decided it needed to be fixed, with near-zero clue of how to fix it.
I asked around on some of the 'dirt' forums. Most popular answer was 'concrete', which was not an option. One dude said 'you don't sound like an excavation contractor, get off this forum'. So nice.
Anyway, I scraped off the sod and decayed grass and dirt, got a slope away from the buildings, and
laid down fabric and about 4" of #2 crushed limestone. It looked so much better and water didn't puddle, so I felt lucky. When it was dry I drove one of the forklifts out on it and stopped. When I tried to move, even tho the stone was crushed not round bank run, the tires rolled the stones and they sunk down.
A sinking feeling for sure.
Searched around on the net some more, and wondered about 'fines' mentioned. Visited a couple gravel yards where they had sample piles, and stumbled upon the '3/4 and less with fines'. They call it 'Item 2' here in upstate NY. I kicked at the pile and wow did it seem solid! So I had 5 tons delivered to try it out, and to my amazement, just a 'dusting' of maybe 1" of that stuff, and everything tightened up! Drive the forklifts over it now with no issues. I ended up putting down about a 2" layer and tamping it in, letting the rain get on it, and after that the tires barely leave any impression. I call it 'miracle stone'. When you finally figure things out, it can be a good feeling.