I would think not, as the motor is what's going to be the load and I would expect the fusing to be on the main line into the unit, not the switches. Can you pull the switch and then test for 12v at the switch that's not working? I'm not familiar with those exact switches (can you post photo?), but next thing to do would to test the switch if it's a simple analog switch and not a digital panel you are having issues with (ie, pull the switch and check for continuity when in the "on" position if it's a simple analog switch).
May have a wire that's worked loose over time or a bad switch.
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