gopta3

1994 Ford Mustang GT convertible V8 kills a battery really quick? I parked the car last fall and it was running fine. I took out the battery and it wouldn't take a charge. My charger just faulted out. The battery read 3v. I got a new battery a few days ago and installed it. Car started fine and I ran it for about 5 minutes and parked it. 3 days later the batter is completely dead. I disconnected it and it reads about 0.3v. I ohmed out the positive wire to ground and its 0ohms. Is it supposed to be a direct short like that?

I didn't leave on any lights etc.
Anyone have any ideas?
Thanks, and I hope i posted this in the right spot, new to the forums.

mjr46

because you have a parasitic draw...you need to hook a dvom set to amps in series with the neg battery terminal to post of battery and measure draw, safe at rest draw = 25-50 milliamps

vt89gtvert

Once you set up the meter and not other draws on the battery (Lights, door chime, etc.) pull the fuses one at a time to help give you and idea where the draw might originate

lxman1

if it ain't a light on somewhere like the glovebox, then it is usually a bad voltage regulator that sticks and drains the battery while the car is not running, even though it charges fine while it is running.

gopta3

thanks for all the ideas so far, greatly appreciated, I still have to try them. I post again.