(1) possible blown fuse.
Note that fuses blow for a reason - seek out the reason, or it will blow its new fuse too.
The main fuse block is located inside the left side of the
engine compartment near the battery. There is also an interior fuse
panel located just above the left side kick panel.
Interior Fuse Panel
The interior fuses simply unplug
from the fuse panel. Use the fuse puller tool provided with your car to
remove fuses from the panel. The tool is located on the back of the
interior fuse panel cover.
(2) possible blower motor dead. See maintenance manual excerpt below.
(3) possible blower motor relay faulty. Location of Blower relay:Under hood, drivers side, front engine area,rear of headlight housing; relay mounted on drivers side of radiator shroud.
1990-92 Mazda 626 and MX-6
See Figure below
Disconnect the negative battery cable.
Remove the glove box and the underdash cover.
Detach the electrical connectors from the blower unit.
Remove the blower unit-to-fire wall attaching bolts and remove the blower unit assembly.
Remove the blower motor fan-to-motor fastener.
Remove the blower motor-to-unit attaching bolts, then remove the motor.
Installation is the reverse of the removal procedure.