There are relays in multiple locations on both the Buick Park Avenue and Olds 98 series vehicles. They are located in 1 of 3 areas. under the hood of the vehicle there is a plastic cover that covers up 1 or more of them (located on the firewall right under the hood). Also there are a couple located on the front driver side next to the air intake housing between the headlight and fender well. There are also relays under the dash on certain years and models of both of these vehicles. These are located under the passenger side of the dash behind the glove compartment.
In the 1999 Trooper the relay is sbove the inside fuses. It is above the fuse door, so that the whole panel by bottom of the driver door must be pulled. Don't know if that helps for 1990. Note: My fuse, relay and motor are good, but no power to motor. added 1/22/2008 The blower motor resistor is located on the housing located on the firewall. This housing is were the blower motor is.
A vehicle has many relays: Starter, Horn, Blower motor, wiper, Headlight, Fuel pump, etc.
it is located under the glove box remove panel under glove box and the blower motor has three screws and two wires takes about 30 minutes
where is the blower location the Mercedes Benz 300 d
Try up against the firewall on passenger side--may have to remove plastic cover
If you have checked and the blower motor has both power and ground then the motor is bad.........
Inside the blower motor housing directly behind the electrical coupler.
In the truck!
To replace the heater blower motor: First unplug the wire connectors. Then remove the screws and the motor will pull out. Reverse the process to reinstall the blower motor.
under the hood hinge on passenger side in the corner going into the cab at an angle
the inhibitor relay is between the a/c relay and the cornering relay
i had a 1990 acura legend my blower motor was located under the passenger side dash board