Just wanted to add my 2 cents.
1998 Grand Voyager - My symptoms were:
1. Fan worked intermitantly and would not blow that hard.
2. Sometimes had a low grinding sound.
Started out by replacing the blower motor.
New blower motor without mouse cage (circular fan) from carquest $44
1. Removed glove box - no screws to remove
2. Removed 4 8mm screws from bottom of blower motor housing.
3. Unplugged wiring harness
4. Removed bottom cover of blower motor housing
5. Pulled out the motor / fan assembly
6. Pulled wires through the housing.
7. Another 2 hands is helpfull here
8. Removed clip from top of fan where motor shaft runs through
9. Had my wife hold the fan while I tapped the shaft with a screw driver.
10. Motor fell off of fan.
11. Removed 2 screws from bottom of motor shroud, removed shroud from motor.
12. Installed shroud on new motor, then fan.
13. Put it all back together.
14. It was easy.
15. Fan works like new blows hard. All speeds.
Never checked the resistor but will eventually.
This board rocks!