How do you find and test a brake light switch on a 1997 Geo Metro?

The brake light switch would be located under the dash right above the brake pedal. It could be mounted to the pedal arm itself, or attached to the dash. You would unplug the switch, and using just a continuity meter, stick the probes inside each connector of the switch, and press down on the brake pedal. If the meter buzzes, or shows 0 ohms then the switch is good.