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From: John Robertson <jrr@flippers.com>
Newsgroups: sci.electronics.repair
Subject: Re: Switch Contacts
Date: Sun, 15 Sep 2024 22:46:18 -0700
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On 2024-09-15 9:44 a.m., Nick Hayward wrote:
> Hi all,
> 
> I have a switch which isn't making electrical contact. It consists of two
> leaf springs. Dead simple. They're springy enough to push against each
> other alright. And I've cleaned them with ethanol (didn't work) isopropyl
> alcohol (didn't work) and Servisol switch cleaning lubricant (didn't work
> either). I am at a complete loss here. Has anyone come across something
> like this? I can confidently say I never have!

Have you verified that the meter leads are making good electrical 
contact to the switch blades? Oxidation can fool any of us! Touch one 
probe to the switch blade, and touch the other probe further down the 
blade - repeat on the other side, only then check for electrical contact 
closure once you are certain you have good probe connections.

John :-#)#

-- 
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