I would suspect the blower motor speed resister is shot.
bad blower resistor
BLOWER MOTOR RESITAR SWITCH
blower resistor is bad
Ask a guy
I would suspect the blower motor speed resistor is bad.
The fuse. The blower motor speed resistor. The blower motor relay. The blower motor switch. Check for power at the blower motor connection.
sounds more like blower motor resistor cost about $30.00 from dealer and 2 screws hold it in place
Your question needs clarification - are you asking about the heater blower fan or the motor cooling fan? The heater blower may have a series resistor that is used for running the fan at slow spped. The resistor may be inside the box that holds the heater blower. It could be an open coil of wire that looks like a spring. The motor cooling fan usually runs at one speed, thus there is no series resistor. Are you instead asking about the resistance of either fan motor. You might find that listed in a repair manual. Try your public library.
If you are referring to the blower motor speed control, and you only have one speed, then the blower motor resistor pack is defective and must be replaced.
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