it's under the dash board, under the glove compartment and just to the left of the blower itself. it's a black box approx 3in wide and 4in long with about 3 or 4 wires coming out of both ends.. Stuart..
The blower resistor on a 1999 Chevy truck Z1500 is located behind the glove compartment. There is also a resistor on the firewall next to the blower motor itself.
Right behind the glove box. Remove the three screws at bottom of glove box. Once it is off you will see it on the blower casing. Remove shroud from below with an 8mm socket. Same socket will remove resistor. Total work time ~10-20 minutes.
resistor for fan blower is in back of glove box, beside the blower itself.
sometimes this is caused by the blower resistor heating up and shutting the circuit down, or it could be in the blower itself heating up and shutting down.
There is a Blower Motor Resistor Pack. Either the blower motor speed control switch itself is defective or the Resistor Pack is bad.
The Blower Motor has a resistor attached to the blower motor itself. I'm not familar with a relay for the motor. I think you have to remove the Blower Motor itself to get access to the resistor. The blower motor is under the dash on the passenger side. It's like 3 maybe 4 bolts to remove.
It would help if you told us what model Buick this is. I am going to assume this is a Buick Car, FWD as the Roadmaster rarely kills a blower resistor. For most common location, open hood and look near cowl for a plug near the air conditioning box just forward of the windshield wipers. It should have several wipers and the resistor itself protrudes downward into the box held in place with two screws. Screws have 7mm, 8mm, or 1/4 inch hex head. If not: look near blower itself under the dash on the passenger side. The resistor should protrude upwards into the HVAC housing near the blower.
resistor is located right by the blower motor itself ..Follow the electrical wires. It will look like a flat chip board from a cell phone!
Check by or near the unit itself
Blown fuse, bad blower motor switch, blower motor itself, or a defective blower motor resistor pack.
Two possibilities. Either the blower motor resistor pack is going bad or the blower motor speed switch itself is going bad. Try spraying the blower motor speed switch with a good electrical contact cleaner. Do not use WD-40. If that does not help suspect the blower motor resistor pack.
In the switch assembly itself.