So I was upgrading my bathroom fan and think I reversed the polarity when reinstalling. Now no lights in bathroom. How bad is it? Are the bulbs blown? Haven't wired up the fan yet. Disgusted over s...
Reversed polarity on a 12 v dc system should only cause the fan to run reverse of the switch indication in an isolated condition. I suspect that grounding by reverse polarity popped your fuse. Shouldn't be any other harm. Test your wiring for correct polarity.
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