Bulbs blow in pairs?

[bigoldchevytoo]

I've never seen this on another vehicle... I've had my 91 for a year and a half and about 3 weeks ago while driving to work I flipped on the highbeams and both blew.
Yesterday, same thing happened when I turned my lights on with the low beams, both lows just blew. WTF?
Do I have voltage reg problems or is it possible that since both bulbs are about the same age, when one blows there is a small power spike to the other one which is equally weak which puts it over the edge?

[WDELOAD]

check your grounds

[TheSilentChamber]

More offten than not its a voltage regulator/alternator problem.

[Savagetendencies]

this happend in my 91 hatch and I checked everything and spend quite a bit just buying bulbs but for me it ended up being the head lamp switch itself mine when I took it out was burned inside so I switched it and they work now dont know if its ur problem but it fixed mine hope that helps couldnt hurt looking into it.