[ischmitz]

Hey, good news after all. I agree that the voltage regular is damaged and that is what most likely causes the 3 Amp draw. I don't think the diodes will deal with reversed voltage. Also, once you pull the alternator check the engine to alternator harness carefully. There might be a short, it is very comon. The other item could be that filtering capacitor in the engine electrics box. It is an electrolytic capacitor and they do not like reverse voltage at all. Depending on how much it saw it could have blown up. You can simply disconnect it. It is not really required.

Not sure about the ABS unit. You need the hammer or PST2 to check what made it unhappy. Which fuse was blown?

And the exhaust leak is a gasket or rusted heat exchanger. Don't worry about that for now.