should be under the hood.
It may not have one on a '73. If it does it would be under the dash.
Perhaps a bad fan motor? Perhaps a bad fan resistor? Perhaps a plugged evaporator coil?
in my 89 Oldsmobile delta 88 , the heater motor was directly under the center of the windshield under the hood. black circular thing.
1992 olds Achieva does not have that switch. ECM receive signal from the coolant temperature sensor and send command to relay #6 for turn on/off the radiator fan. Relay #6 is located in the motor compartment on the fireboard.
Under hood, passenger side, rear engine area, upper firewall, mounted in relay panel
My 1992 Olds Delta 88 has the serpentine belt diagram on the top of the radiator
Need to check FUSE for the fuel pump in the fuse box. And you did not say what you are working on.
On the right side under the dash. - If it has automatic controls, If it is manual controls, it is behind the controls in the dash, the knobs connect to it.
where is cooling fan relay on 1995 olds acheiva
There should be two hose's coming off the engine going to the firewall. Black in color and about 1 inch across.
The fuel relay switch for 1993 olds cutless ciera is in the dashboard.