its a fairly straight forward procedure. remove the negative battery terminal, unplug the connector on the alternator, and remove the nut from the main power wire stud. then pry the wiring harness off the alternator body with a screwdriver. remove the 12mm bolt from the bottom of the alternator, and pivot it toward the engine. then the belt can be removed. once that's done, remove the 14mm pivot bolt and the part can be twisted out. if its stuck on the top, pry it with a big screwdriver, there isn't much you can hurt. installation is reverse of removal.
A 1991 Toyota 4runner is bigger than a 1990 4runner
ignore pls
unbolt the negative power wire unplug the positive power wore remove the tension bolt on the top of the alternator remove the lower bolt and pull out the alternator
go to the Toyota store n ask them if they don't no go on Google and type in this how toinstall rear speakers on a 1991Toyota 4runner
it mounted on the throttle body
Not sure if 1991 and 1989 is sameNot sure if the alternator is under your right front seat on a 1989 model, but it is on 1991. You need to remove the seat and the top under the seat to get proper access. When that is done, it is easy removal of the alternator. You will see that the alternator is self explainable.
go see a mechanic
Fuse block in engine compartment right side.
By your left foot about 8 inchs up on driver side floor board
Freon but you can convert over to the new stuff
look on the intake manifold it will be stampes into the manifold cast.
The thermostat on a 1991 Toyota 4Runner is located on the engine block. It can be found by following the large hose coming from the radiator.