Quote:
Originally Posted by Franke
Yep. What John and Gold said. Hope that fixes it for ya. 20 plus years of service can cause dirty contacts. Bet the door window switch is the same.
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As with so many of the issues that come up on the car this is an old and repeating one. Yes by all means clean the contacts. The reason they fail is oxidation. The metals used are a cheap tin alloy. Cheaper than it should have been.
Coat them with dielectric grease when re-inserting the head contacts.
This keep oxygen away from them prolonging the time it takes to oxidize. It's not the buttons it's the connector.
There is another thread somewhere on this but I'll restate the cause from the perspective of a classmate of mine who holds a PhD and 26 patents in the field of metal to metal contact issues. It is the result of dendrite growth and oxidation.