Humidity and electrical gremlins

[anthonyb]

Does anyone know how humidity affects electrical components? The last few days it's been raining pretty consistently here, and I noticed yesterday that my tachometer (which has been dead for the last 6 months) suddenly started working again. And a couple of interior lights (which would power on whenever the engine was on), now work properly (only when the head lights are on). Does the humidity even have anything to do with this, or is it coincidental?