heat/ac issues

ok i have a 95 isuzu wanting to sell but wont til everything is fixed. but heat went out last winter. now has new control head in dash. jumped power to the blower motor and all works. but the fan speed does not work on dash. isuzu dealer told me it was probably a resistor. anyone know if this is inline or where it may be. and what resistance it should be. or if you have any other ideas please feel free to post them.

I had the resistor shit out on my Nissan, it was located under the dash on the heater box, there is a wire harness that goes to it, and it had 2-3 screws holding it on, once pulled out, it looked like the inside of an old Nintendo Game, flat board with some copper leads, and thats it.

really i will look for that. was it on the wiring straight from the blower motor?

ha it worked i have defrost and heat again. now just gotta replace calipers and rotors.

ha it worked i have defrost and heat again. now just gotta replace calipers and rotors. thanks man that was a big help though dealer ship said they didn't know where the resistors were.