The blower is controlled by the blower switch, blower resistor, and relevant power relay.
You see that knob you turn to run the blower? That's it.
Under the dash on the right side.
Remove the glove box. The front blower motor and the resistor can be accessed from there.
On the blower housing. Remove the glove box to gain access.
In the ceiling housing for the rear A/C.
Right inside the roof housing where the air comes out.
There is really no method to "check" the resistor, text by substitution.
Held in by two small screws under dash.
Is it really the same as the Nisan Quest? Anumber of parts are the same.
It would be in the relay box under the hood near the battery.
On the bottom of the heater/AC housing under the dash.
Under the dash, at the extreme right near the passenger kick panel.