Most of the time the only problem with a Toyota alternator is the brushes wear out. See here for replacement

http://www.4x4wire.com/toyota-maintenance/replacing-alternator-brushes


BUT, before you do anything, you need to go to AutoZone and have your charging voltage and amperage checked and your battery load tested before you assume its the alternator.


88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride