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Hmmmm....thats odd. I know in the manual it will tell you how to reset the power window`s etc. but I dont know if it will tell you anything about the mirror`s. Try disconnecting the battery again for a few minutes,and see if that clears it up. Also make sure the mirror switch is not in the middle position,if it is,they wont tilt down.
If it goes up/down manually, then it's not the gear drive or motors. Try manually running the mirror all the way down and then all the way up and then back to the normal position. This once helped mine.