If you are referring to the blower motor resistor, it is located behind the glove box and in the heater case.
Defective Blower Motor Resistor Pack.
Yes, located in the blower motor resistor pack. Follow the wires backward from the blower motor to find it.
directly under the glove compartment
Follow the wires from your blower to the connector it is attached to and that is your Resistors. Some models have two screws holding the resistor pack into the black plastic ductwork. Others say to "cut here" so that you removed the black plastic sealing in the resistor pack. Chevy, GMC all resistor packs similar installation but slightly different types and locations.
try looking at your resistor pack on the passsenger side lower the blower motor down and there is a heat coil and resistor in there
Defective heater resistor pack.
On the blower housing. Remove the glove box to gain access.
If yourtalking about the heater blower, I believe they are hidden behind the glove box inner liner.
The blower motor resistor pack is defective. Replace it.
There is a resistor pack operated by the fan switch. It has failed. You need to replace it.
The HVAC resistor pack is used to provide the various speeds of the blower motor for heating and A/C. According to other sources, the resistor pack mounts to the rear of the blower motor, which is located under the passenger side dash.
The 2005 Ford F1 50 pickup truck blower motor resistor pack can be found on the firewall in the engine compartment. The blower motor resistor pack is on the passenger side of the firewall.