i have a problem with the battery or alternator in my 02 mustang. The battery has no charge. I took the battery in and they charged it and said it was fine put it back in the car and it worked fine i disconnect the + cable to see if it was the alt but the engine ran fine without the battery. I drove for a day and then the battery was totally dead again. anyone know what the problem could be?

 

Battery could have a dead cell.

 

maybe an electrical short ....radio alarm maybe u left your lights on lol not to sure other than the short

 

looks like you need a new alternator

 

if your car stayed running while the battery was disconnected then your alt is fine. Looks like it may be time to get a new battery.

 

i took the battery into have it checked and they said it was fine. i just got this battery 3 months ago.