Originally Posted by vtdotcom
I tried that unplug/plug trick again and no fan this time. the motor is supposed to work on high if the resistor goes bad... this doesn't work at all. I kept the relays inside over night and plugged them in when I started the car and still no fan. the next time it acts up, I'm going to see if there is a voltage at the motor leads. Is it possible the console controls are bad or whatever control board the fan speed button leads to?
yes i see your point that the resistor only varies the voltage for different speeds, without it would be straight 100% voltage to the fan motor which would give the highest speed. Definitely check to see if you have voltage at the power lead for the fan. It is possible that the HVAC controls have gone bad, but first check the voltage to the fan. We've had problems here with the blower fan before such as, bearings dying, making noise, lowered speed, things like that. I wouldn't be surprised if the fan was bad.
I posted up before here, have to do a search, but TYC makes an aftermarket replacement for about $40 instead of the $180 the dealer wants for this fan, if yours is bad. $180 for a fan is just plain ridiculous. so let's find out if there is voltage to the fan.
im looking at the service manual, what resistor? all i see is the blower motor control, doesn't look like it's able to be opened up. that would be the item you'd want to look at to see if the fan was getting voltage.