I picked up 4 tons of limestone today to finish off my side driveway, when I parked the deuce on the front driveway the parking brake didn't want to hold all of the extra weight on the incline, so I left the truck in gear to give it a little more hold while I got the tires chocked. Anyhow, I never leave the truck in gear, so when I went to move the truck a little while later I hit the starter button and it bumped forward a bit. I immediately realized I had forgot to take it out of gear after chocking the tires. Well, I put the truck in neutral, hit the starter button again and nothing happened. All of the gauges went to zero, but that was it. I've made sure all of the battery cables are tight, tried bypassing the starter button and tapped the starter/solenoid a few times with a hammer, but still nothing. What should I check next???