Ouch...
Unfortunately there are quite a few components that are transistorized, and any one of them could have blown transistors when the battery was connected backward. You can pretty much count on the alternator being fried since there is a diode plate that will not have tolerated reverse polarity, as to the computer and ignition system, it's anybody's guess. It all depends on whether the manufacturer anticipated that kind of mistake.
Check the fuseable link.
it could be the started is shorted out because of the battery being connected backwards
You have a flat battery! Check that your batter terminals are connected
check battery cables are connected correctly, and there not crimped under the battery.
There could be many reasons why a car won't start in the morning. It might be a problem with a cold start, but it could be the battery isn't connected all the way, or the lack of gas.
How to install a battery?
Make sure connections are on tight.
articat atv366 wont start makes a cliking noise has good battery
Check you battery
Dead cell in battery or the alternator is defective. That is assuming all words are connected and not corroded.
1992 buick road master after you put a new battery it crank but wont start what is the problem
Your car wont start. lol
Weak battery