Not trying to be rude, but it can be anything. If you have a wiring diagram and can do the diagnostics, start at the battery and check power and ground. Does your solenoid do what it is supposed to? Is the voltage right at the coil? If you can't check these yourself, you should get it to a good mechanic. Almost noone can diagnose properly without putting their hands on the car.
I bought a battery charger and it's working but if that happens again, I might take it to a mechanic to see if its the alternator or other of the things you guys said. The cables are good and new battery. So hopefully wont happen again,
Thanks for your advices.
No, you check the alternator by starting the car, then you remove a battery cable from the battery. If the car dies, it's your alternator. Putting a meter on the battery terminals will only give you battery voltage. Also, good voltage doesn't necessarily mean it's a good battery. You also have to check amperage, hi volts but low amps isn't too common but, it can happen.
Yeah, it is the alternator I am pretty sure. The car dies after the battery lose charge.
How expensive is an alternator for this car? Is it easy to change?
I guess its the price for having old cars but I love my mustang so it worth it.
---------- Post added at 06:20 PM ---------- Previous post was at 06:11 PM ----------
Any suggestions of brands when buying the alternator?