Yes, unlike a diode, a resistor is bi-directional (technically known as non-polarized)
A resistor is bi-directional meaning current can flow in either direction. Current flows from positive to negative.
A resistor is not polarity sensitive, and may be installed in either direction. That's why resistors don't have pluses ( + ) or minuses ( - ) printed on them.
If you are referring to the blower motor resistor then it is inside mounted on the evaporator case.
Either way, it doesn't matter.
you will find the resistor mounted in the air duct near the fan motor
Resistors can be installed in any direction in a circuit. It doesn't matter in which direction you are installing a resistor. Resistor will resist the current in both sides of the connection. You can also apply capacitor in any direction for alternating current. Where as if you are concerned with direct current, a direction is needed to apply the connection
The resistor is usually mounted in the duct casing under the dash. On Dodge, you can usually see it behind the area of the glove box and is either mounted in the side or from up underneath. Look for a plug that has 4-5 wires mounted to it, held in place with two screws.
The blower motor resistor is mounted next to the motor on the passengers side under the dash..............
The blower motor resistor is mounted behind the glove box door.
Blower motor speed resistors are generally mounted close by the blower motor. They rely on the blower to cool the resistor.
Because.
Could be a bad blower motor, or, look to the blower motor resistor mounted on the engine firewall on the passenger side near the top of the firewall inside the engine compartment. It will have five wires going to it. It is likely either burnt out, or the wires have shorted at or near the resistor.