As Larry says, it's hard to troubleshoot from afar. It seems that if the fuse blows when hitting the switch that there is a short. I've seen that with headlight motor switches that were bad and caused the fuse to blow right away. I would unplug the wires from the switches and check for shorts. Use a voltmeter that has a continuity tester to test. If there are no shorts in the wires, then plug one switch in at a time and check again. Bad grounds can cause all sorts of problems also.
Ken