When your blower motor was working in only one speed "High". It is very possible your blower motor resistor is either stuck or needs replacement.
If you can repair it yourself that will save you some money. Here is what you need to do.
Remove the speed control servo.
Disconnect the electrical connector.(1)
Remove the bolt. (2)
Position the speed control servo (3) aside.
Remove the coolant/washer reservoir.
Remove the two screws and the two nuts. (1)
Move the coolant/washer reservoir (2) aside.
Refer to the sketch below for the blower motor resistor location.
You will see the blower motor resistor (1) just below the vent hose. The arrow is pointing at the blower motor housing.
Turn the heater fan speed selector on "High".
Turn the ignition "On" but do not start the engine.
Get a long screwdriver or something similar and place it against the resistor housing.
Give the resistor a slight tap, listen to see if the blower motor is working. If it isn't, give it another tap.If it is not working, give it one final tap.
If the blower motor is still not working the resistor needs to be replaced.
To remove the resistor:
Disconnect the electrical connector from the resistor.
Remove the two small bolts.
Remove the resistor and replace it with a good one.
You can buy the resistor "new" at an automotive parts store or if you have a "Junk Yard" or "Auto Salvage Yard" near you, you can pick a used resistor up from them and save some money
I hope that helped you out;
Wednesday, December 9th, 2009 AT 6:45 PM