My dad'* 95 had the leaking master cylinder. You may have to look very closely to see where the fluid is running down the vacuum booster. In his case, it looked more like a clean spot, than a leak. A friend'* 93 had a broken brake line in the back. If the pedal is all the way up (pull the release and lift the pedal with your foot), then low fluid is likely the cause. The 93 also had a stretch emergency brake cable that needed to be adjusted, or the pedal would drop setting off the light and the dinging.
Black 2000 SSEi, Silverstar Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, drilled 180 degree thermostat, Intense FWI, PCM, shift kit, and 3.4 Pulley. Solid front mount.