1991 toyota previa motor and blower not working why

probably the main one. did you try the map sensor. my dad had one that he spent alot of money on and come to find out it was a $26 map sensor that plugs in on top of the motor.

More than likely the blower motor is defective due to a worn armature or carbon brushes. The best thing to do is replace the blower motor. Make sure you check the connector at the motor for signs of overheated wiring, when the motor starts to wear out it draws more current and can burn the connector at the blower, if the connector is burned it must be replaced or new terminals installed. You can buy repair connectors from Toyota for most modules and they are also available in the aftermarket for the most popular models. The blower motor is available in the aftermarket for about $120.00, the connector I am not sure about. Here is the part number for the motor.
FOUR SEASONS Part # 35647

the last year, your blower resistor has been bad, now your motor is bad. rap on the motor and see if it start to run, if so, replace the motor and the resistor.

hola, porque el toyota previa 91, tiene un tanque enfrente que al parecer es para el aceite de motor. pero bajo el aciento tiene otro que tambien indica aceite de motor. nadie me despeja esa duda y el tanque esta seco, pero el nivel de aceite de abajo me marca correcto. que hago? ayudenmeeee!

pop fuse cover, remove vent housing, remove speedo upper cover, remove 4 bolts holding speedo remove speedo, change bulb

always lay on floor and look up thats how screws are put in.

doest not work means what? blower or cool?
if blower, maybe try check the switch fuses, connection from switches and the blower motor itself.

blower motor bad or ac clutch bad,,check blower resister as well,it is in the blower box ,blower motor is the most comon to do this

the oil should be black,brown or gold(new) with no other colors in it. shouldnt be milky or streaky. the trans fluid should be light red or semi light red.as for the engine being oily its hard to discern unless you rinse it off to metal and drive it. if you mean the oil pan has black oil on it then it may be ok.