Well, I own a 1993 buick regal custom with the 3.1 v6. I havent had any major problems. It has 203,000 miles. I've replaced the struts, exhaust, and the driverside power window needs a new "clip" but it works as long as I guide it. Great reliable caR!
I believe that the switch is located in the ignition cylinder (which you can get from any auto parts store). Unfortunately you'll need a steering wheel puller and a tilt removal mechanism before you can start with that.
You can bypass the power steering pump pulley in your 1993 Buick regal 3.8 liter engine. Measure the distance around the other pulleys, without the power steering pump pulley. Take the measurement to your local auto-parts stores and ask for a belt of that measurement.
The Heater Blower Relay on a 1993 Ford Explorer is located in the Power Distribution Box. The PDB is in the engine compartment, mounted on a bracket attached to the right fender apron. The Heater Blower Relay is one of six relays, the first relay on the upper left.
The blower rheostat on a 93 Pontiac Grand Am is located inside the engine bay, just to the right of the blower fan housing. It is almost directly behind the trans dipstick. It isn't that hard to replace.