This can be moved to the Eaglepedia, but I suggest waiting for a few days. Someone may have comments or even corrections!
The wiper switch and headlight switch can be replaced by reaching up through the opening for the 4 wheel drive selector switch housing. This may be very difficult for those with large hands.
Disconnect the battery negative ground cable.
Remove the 4 wheel drive selector switch housing by loosening the two screws securing it to the dash. The screws do not have to be removed completely. If they are removed completely, replace them leaving them very loose before reattaching the housing. Nothing inside the housing must be removed. This housing is held in place with a metal plate that fits inside the opening. It will come out with the housing.
Remove the wiper switch knob using a small screwdriver from underneath the shaft to press upward. This has been discussed elsewhere.
Again using a small screwdriver, remove the lock nut securing the switch to the dash.
Reach through the opening in the dash and carefully work the wiper switch out through the opening. It is a close fit but it can be done. Unplug the connector and ground wire, hoping and praying that the other end of the ground wire is securely fastened within the dim reaches somewhere under the dash.
The headlight switch knob does not have to be removed. The shaft can be released by pressing in on a button on the side of the switch. The button is on the side opposite the connector. Reaching through the opening, press inward on the button on the side of the headlight switch, and pull out the shaft.
With a screwdriver, remove the lock tube and remove the switch. The switch can be worked out through the opening but it may be easier to first unplug the connector. Unplug the ground wire on the back of the switch. We again hope and pray that the other end of the ground wire is securely fastened. The connector has keepers on both sides that must be opened.
This is the spade connector for the ground.
To replace the switch, connect the plug and ground wire and carefully work it in through the opening. With a screwdriver, replace the lock tube. Insert the shaft. You can feel it click into place. Pull on the shaft to ensure that it is in place. Reconnect the battery cable and test the switch. If it works correctly, disconnect the battery cable.
Insert the wiper switch through the opening and connect the plug and ground wire. Insert the switch through the opening. Replace the lock nut with a screwdriver and install a knob. Connect the battery cable and test the switch. If it works correctly, the battery cable may remain connected if your battery can hold a charge with the doors open as you continue working.
Replace the 4 wheel drive selector switch housing.