my 2012 dodge challenger wont crank.

If the battery is fully charged and it's not cranking it could be a few things. Anti-theft system, shifter not fully in park, bad starter. You will need to perform some additional testing. If you don't normally work on the electrical system of newer cars you may want to bring it to a shop. Use this link to find a good shop near you. https://repairpal.com/repair-shops Alex