On my 87 it was easy. I am assuming that the 92 is about the same. First remove the headlight and wiper *****. There is a slot in the ****, just slide a screwdriver or awl in there, put pressure on the retainer and pull the **** off. Then 'pop' off the dash panel and let it hang there if you have a gas tank switch. There now should be 4 bolts holding the switches in. Remove them. The headlight switch should unplug from the harness. The switch has a nut thru the pull lever. Take it off. Everything should be able to be replaced. A new switch is around $15-20. Make sure you check the harness for any meltdown. Mine melted twice. It needs to be replaced again. It is easy too. Just push the wires out one by one and put them into the new harness block. The new block comes with short wires so just color match them to the existing wires. Do them one at a time. You should be able to put everything back easily once you remove it.
Hope this helps
If you have dual tanks, I recommend unplugging the wiring harness going into the tank switch before you pull the panel cover out, especially if it's cold there. Otherwise, be very careful not to torque the tank switch as you manipulate the panel.
I left my tank switch connected, and discovered that the plastic in my 1990 panel was brittle. The threaded sleeves in the panel that the switch screws into disintegrated as I pulled the panel out. I ended up having to drill through the panel and put in a couple of bolts to hold the switch on. That works but doesn't look as good.
After removing the *****...DON'T try to "pop" the dash bezel off or it will "pop" into pieces. The small trim in the middle of the bezel (some are grey or woodgrain) hide small bolts which must be removed prior to "popping" anything loose (trust me I know). Use a small screw driver on the trim and it will come out giving you access to the bolts...