How do you test the multi function switch control on 95 Chevy s10?

To test the multifunction switch control on a 1995 Chevy S10, start by ensuring the vehicle is off and disconnect the battery. Remove the steering column cover to access the switch, then use a multimeter to check continuity across the different terminals while operating the various functions (turn signals, wipers, etc.). Compare the readings to the specifications in the service manual; no continuity where it should be indicates a faulty switch. Reassemble everything once testing is complete.