Resistor is a separate unit from the blower motor
In general the heater blower motor speed resistor is located in close proximity to the blower motor.
Blower motor: remove the glove box and you will see the blower motor and blower resistor.
Your truck has both. the resistor is between the switch & blower.thje resistor controls the blower speed
You'll find the heater blower motor resistor in the heater/air conditioner compartment. This compartment is location underneath the dashboard. This is the part that allows the heater blower motor to change the fan's speed.
Up behind the fan under the passenger side airbag
A resistor is an electrical item/unit that takes a pre-determined voltage & controls the output to various voltages. A relay is an electrical switch
To test the blower motor resistor, unplug the resistor connector. Each blower motor switch input terminal on the resistor must have continuity to the resistor output terminal, which is connected to the circuit going to the blower motor. If the blower motor resistor continuity does not check OK, replace the faulty resistor.You need a multimeter to test the resistor block and there should be continuity between all terminals.
A malfunctioning blower motor resistor will cause the blower motor not to work. When the resistor is bad the blower motors will not turn on.
Since you're checking the resistor, I would assume you checked the fuse/relay for the blower motor. If not check that. If you have then there would be an open wire between the relay and the resistor.
The Resistor is located on the outside of the blower motor. Have to remove the blower from under the glovebox to get to it. The Resistor is located on the outside of the blower motor. Have to remove the blower from under the glovebox to get to it.
Under the glove box between the firewall and the blower motor
The blower motor fan cools the resistor so the resistor is usually located close to the blower.