Can't find the blower motor resistor on a 1998 buick park ave. with automatic controls. Blown fuse, motor tested OK, relay tested OK, and controls buttons light up and appear OK.

https://www.autozone.com/cooling-heating-and-climate-control/blower-motor-resistor

fuse in fuse box, relay and resistor located on fire wall next to blower motor. strong possible resistor is bad

Not sure hat rely you are checking but the blower motor does. To have a relay in the rear fuse block. The fuse you're checking protects the HVAC computer. The HVAC computer uses that circuit to monitor the voltage going to the blower motor.

The most likely problem is the blower motor resistor, aka blower motor module, blower motor speed control. It is typically located near the blower motor. The red wire is power from the battery and should be there all the time. Black is ground. Purple is power to the blower. Grey/black is the speed input from the HVAC module.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

1993 Blower Resistor Module

• REMOVAL & INSTALLATION

Print

Fig. Fig. 1 Blower resistor assembly is underneath the fuse block

REMOVAL & INSTALLATION

1. Disconnect the negative battery cable.
2. Remove the rear sight shield.
3. Remove the fuse/relay block assembly and bracket.
4. Disconnect the resistor module connector.
5. Remove the retaining screws and remove the resistor module.

To install:

1. Inspect the gasket and replace or repair as required.
2. Install the resistor module and secure with screws.
3. Connect the resistor module connector.
4. Install the bracket and fuse/relay block assembly. Install the sight shield.
5. Connect the negative battery cable, and check the climate control system for proper operation

if car is equipped with auto a/c blower motor module is located under the hood in the air duct for the heater

The switch , relay, or motor are shorted out .
First locate relay and remove it to turn the blower off.
If you want to do the diagnosis yourself ...remove the switch first and see if the motor stops. if it does you've found the culprit. If not move onto relay if the relay removal kills the motor thats good news. if it doesn't then this thing gets B+ right from the battery at HIGH SPEED. Your gonna need Shop Manual
to show you where this thing connects to the battery.
So either the switch, relay, motor , or resistors ( in your case where battery connects to the motor are your problems.
Unlessyour really good with electrical items pull the relay and bring it to a repair shop.

check to see if there is a resistor on the blower motor. it should be located either beside or underneath the blower motor.. if that is bad it wont let you select different fan speed settings and if it goes completely out the blower will not work at all.

The blower motor resistor pack may be defective.

You need a blower control module. It's about six inches from the blower motor on heater case.

check blower motor resistor control assebly that is located on top of heater control box under hood close to firewall