Does anyone know where the resister is located?

Forgot to add its a 2004 Vibe.

My wife's car has no heat. As I under stand it, there is the motor, the 4 position switch and a resistor. I have read the other posts. At first it would work on high speed only and erratically. Now nothing. I do hear a clicking behind the dash when the switch is turned to any speed but off indicatin...