Can I regrease my electric switch? And if so, what should I use to remove the old grease? And more importantly, what sort of grease should I then use to regrease this 12 volt switch?
I have white grease, lithium grease, ball joint etc. grease (in a grease gun), some wheel bearing grease, "bicycle" grease in a tube by Schwinn, and maybe one more kind. I even have Crisco. :) Or I can buy something new.
My '95 Chrysler heater/AC fan speed switch no longer works in position 2, the one I use most often. A new replacement is very expensive**. I'm told the other speeds will fail soon.
With the switch dissassembled, it looks fine. There is some old grease on the contacts, now darker than new, but was brown and shiny when new. It is now, at least on the surfaces of the grease, a little bit harder than new, but when I push aside the grease with a wooden match stick stem, the copper contact underneath shows no burning or anything unusual. It's not as shiny as new, but I didn't think that would matter, since I'm sure the other three speeds aren't either.
I thought just mixing up the grease would be enough, and sure enough, the meter had shown infinity but now showed almost zero resistance, well under an ohm.. After reassembly it still tested good (with the low current used by meters) but after reinstallation, again the second position of the switch didn't work, not enough to power the fan (though the separate resistor that is used to lower the voltage to get a lower than max fan speed.)
**The switch is not sold separately and a whole new control panel costs 150 or 250 dollars. If I buy from a junkyard, I'm told it will probably already not work for the same reason mine doesn't.
What should I do?
Thanks for any help.
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