Where is blower motor resistor exactly? 2002 grand prix no 1-4 blower motor speeds, sometimes 5 comes on when it feels like it doug v.

Your blower motor resistor module has failed. You can replace it with a little effort. The cost is around $35 to $40.

It is the blower reastat. Alot of them have a resister in them. Occationally the resistor will fail causing the problems you are having.

The blower resistor has gone out but if blower is no longer working on speed 5 then either the blower motor is bad as well or the pigtail connector to the motor are bad. Check the plugs to the resistor and to the blower motor for insulation damage discolored or melted wiring.

It's not the blower motor that is bad, but rather the blower motor resistor. Next to the motor is the resistor and by replacing that the motor should work in all the speeds. This is a common problem on the 97-04 Grand Prix.

Replace the blower resistor that is mounted next to the blower motor on the passenger side of the vehicle.
This will restore correct blower operation and I suspect it is also back-feeding voltage resulting in your electrical issues.
Two screws hold the blower resistor into the heater case and it is very easy to replace.
Good luck

what about the actual control panel, maybe its the switch?

for the fan blower motor it could be the resistor or the fan control speed control switch is bad.for no lights replace the DRL RELAY for the lights. for the heated seats check the fuses.

i have been having that same exact problem with my 2002 grand prix for over a year now, and when my ac is on the lower setting the it doesnt work plus the headlights and lights on my dash go out. On Max everything works. i changed the blower resistor(about $35), still doesnt work. i changed all relays and fuses related to the ac, still doesnt work. i changed out the actual ac control switch in the dash, still doesnt work. i have changed everything but the blower motor and have asked every mechanic and auto parts retailer i come across and no one knows the answer. The best answer i got is that it is probably a wiring problem like a short somewhere.

usually a bad blower resistor is at fault...

Replace the heater blower resistor.