Engine cranks but will not start

Engine ran fine when first start fuel tank showed 12 miles on it fill up at chevron gas station drove 2 miles no problem park truck at store 1hour later got into truck to start the vacuum pump on truck started then at same time as normal started truck but would crank but not turn over. Pop open the hood saw corrosion on positive terminal disconnected this and cleaned up terminal got back into truck started up ran for 5 seconds and then stalled now truck will not run. Checked batter saw cells half full filled up with distilled water had friend come over to help with car jump I hook up terminal the correct way let there car run to charge my battery and my battery was charging tried to start car all it would do is just crank over I had it towed home I have no clue what is wrong since I had drained the battery when I got home I tried to check for codes it show 0 codes on my acton obd2 reader. Any suggestions what could be wrong with my truck?