Power surges... resulting in damage in mazda 626

[sebkg]

Hi,
about 6 months ago I started experiencing power surges in my 1989 Mada 626 Sedan. The surges result in all the lights in the dashboard, as well as the headlights becoming very bright. Otherwise, there are no noticeable problems during the power surges. However, I have blown both headlight bulbs at the same time, had the low fuel indicator (light) stop functioning, had the fan stop working, and now the power windows have stopped functioning. Although I cannot be sure it seems these problems are likely related to the power surges. I replaced the headlight bulbs myself and haven't had them blow since, had the fan repared (which turned out to be a matter of bad wiring behind the dash) and now have to get the power windows repaired as well. These problems often seem to come up after a power surge.

The surges can occur at any time (although I have only really noticed them at night - probably just due to it being easier to tonice the brighter lights). The car has not been in any accidents and it has an automatic transmission. I have previously had the auto shop look into the problem but they couldn't find the source...

Does anyone have any suggestions what could be causing the surges? and how the problem could be resoved?
thanks,
Sebastien

[2000izusu]

some causes:
bad battery
bad grounds
bad alternator
bad voltage regulator

[sebkg]

Originally Posted by 2000izusu

some causes:
bad battery
bad grounds
bad alternator
bad voltage regulator

Could a bad battery pump out enough current to do this kind of damage? And why don't the fuses get blown?

I have a feeling its the voltage regulator or alternator....