The bulbs are burnt out. Unfortunately with early models ('93&'94) you can't replace the bulb! You have to replace the whole switch. So, do what I did, and replace the switches with a later model design, say from a '95 or newer. They are the same price, easy to install and in the future you can replace the bulbs. After doing so, dim your instrument lamps to around 90% luminance and you will NEVER have to replace a bulb again. I havn't replaced a bulb in four years since dimming my instrumnets and don't expect to replace them any time soon....