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There are many many questions on this site about failed MF switches. Does anyone know why so many of them fail? Any service bulletins out there? I have had two failures on a 98 within a year.
I've never seen a TSB on multifunction switches.
It's just one of those things that dies sometimes
It may depend on where you live too. Where I am we replace a few but not tons of them.
Besides corrosion, there is also a good amount of heat/amps running thru it. They have pretty small contacts so sometimes they just burn/melt. I would imagine those that pull back on it, to activate both low and high beams at the same time, have this happen more often.