How do you replace the alternator on a 1991 Toyota Previa?

The Alternator is held by "two bolts" located at the top(12mm) and bottom (14mm). Remember to disconnect positive side of battery. First loosen 10mm nut that holds positive cable at back top of the alternator, then unplug wire harness on back. Second remove the 12mm bolt at top form the back. Third remove 14mm bolt at bottom form front. When you remove these bolts you should be able to loosen and pry out with a flat screw drive.