i had a 90 civic dx hatch and the blower motor didn't work,
so i checked the fuses under the steering column and under the hood.. those were good so i had it replaced.. it still didn't work so i took it to Tidewater Electric and they changed a fuse, they said it's a hidden fuse for the blower motor..

well i have a 91 civic dx hatch now and the blower motor stopped blowing air..
i've checked the fuses under the steering column and they are good..
the fuse box under the hood doesn't have a schematic but the fuses are all good..

DOES ANYONE KNOW WHERE THAT HIDDEN FUSE IS?
I DON'T WANT TO PAY 58$ FOR A FUSE.. AGAIN

 

it was probably the blower motor resistor they changed. Its a 10 dollar part and a monkey could put it in hope that helps. try pulling the blower motor and powering it strait to a battery (if its a 12 volt motor, im not sure).

 

the blower resistor gives you different fan speeds..
when i got the old heater fixed they told me the resistor was bad and i would only have speeds 1 and 2..

 

I know it was a long shot, but that was the only "hidden" thing i could think of that would stop the fan from working. Maybe the motor is just bad this time?

 

hopefully not lol