Apparently the brake warning light is not working, but where on the dash is it located?
Where is the brake warning light on the dash? on 1994 Mitsubishi Mirage
take a flash light and shine it on the dash to see what lights are there and not there.
Perhaps Google "1994 Mitsubishi Mirage Owners Manual" or even call the dealer to see if its still available you may find an owners manual for $10 to $15.