front & rear blower inop, fuses, relay & blower good. how do I check the switch?

There are 2 separate switches, I believe, it seems to me that it should be a fuse that has blown! Don't think both switches have failed... TEST fuses with a test light to be SURE that's not the problem... Test ALL fuses...Especially the high amp fuses!! It's easy to miss one!!... Also test for battery voltage at the blower resistor and blower motor with key on and blower on high. Possibly a ground issue also...