the battery keeps dying in my mustang, and i kept charging it back up, and then i thought it was just the battery cuz i put in an optima so i put the stock back in and now the car wont start at all and it like shorts out and dies. any ideas??
If the battery dies after you put a brand new battery in then its most likely your alternator. You could have a bad relay somewhere that is eating your battery when the car is off.
yea i thought it was because i had it mounted in the trunk so i put it back up front and it didnt help and i thought it was the aftermarket alternator so i put the stock one back in and same, how do i check the relays? i checked for any trouble codes and nothing came up.