So I've been having trouble with my 1992 Mustang LX hatchback. Battery gets completely drained within being off for 30min after a full charge. It drains COMPLETELY, the car doesn't even make the token "ding" when the key is turned to accessory.

What I have tried / done:

* Got a new battery, the old one was 4-5years old.
* Checked the drain with the car running and it all appears normal.
* Checked the drain with the car off and it spikes.
* Fully charged the battery, disconnected all fuses for electrical components and the next morning the battery was sucked dry again.

I'm really hoping I don't have a short somewhere, since it would probably take forever to track down. My dad thinks it might be the Voltage Regulator or the Starter Motor Relay/Solenoid. However, I have no disposable income at the moment so I cant just replace everything randomly.

Anybody have this happen to them before?

Thanks in advance.

 

Bad ground or bad alternator.