Here's how you do it:
1. remove the fasteners on the escutcheon around instrument cluster. This consists of 2 or three screws above the speedo, plus one above the light switch, and one above the cigarette lighter.
2. the area around the radio is snap fit. Carefully pull the escutcheon away from this area, and remove entire escutcheon.
3. wiper switch is attached to a white plastic bracket. Plastic bracket is attached to rest of instrument panel with 2 screws. Remove the two screws, and lift bracket away from instrument panel.
4. illumination bulb is inside a twist lock socket on the back of the white bracket holding the switch. Remove socket, and pull out bulb
5. assembly is reverse of installation.
CAUTION--illumination bulb sockets are somewhat fragile, and can be broken if you are rough on the twist lock feature. BE GENTLE.