My 1996's S10 blower quit working. My AC was out too, so i did not pay
much attention to it this summer. I looked at it over the weekend
and found the resistor pack in the air plenum under the hood.
I had one of these fail in my old Mazda B2000, and it melted the
resistors in 1/2. This unit had the resistors intact. BUT, there are
thermal inline fuses with the resistors. There are three of these
and they all seem to be open circuit. I pulled another resistor pack
out of a parts truck and it seems to work. The real question is why
the thermal fuses blew.
I seem to recall last winter sometimes the blower would work, and
sometimes it would not. Then i would play with the switch and it would
usually come back on. So, what would cause this? My theory is
the blower motor is somehow freezing up and causing high current
draw? The blower motor does not make any funny noises like a bearing
going out or such. It seems to work on all speeds now.
Also, sometimes it seems i am getting hot air out of the vents when the
blower is off and the temp is all the way cold. Did the S10's have a
problem with the air door actuator? Do you really have to take the dash
off to get to this or can go go through the glove box.?