As you probably know, pump will/should run all the time (like '76 and earlier) if you disconnect that switch entirely (disabling the switch entirely). Or mix it up with the CSV connector...
Just FYI, this Rennlist thread has FSM screencaps of the procedure to check correct operation of the switch:
https://rennlist.com/forums/911-forum/1031122-cis-experts-only-help-wanted.html
Quote:
Originally Posted by emac911
Found it on Pelican, but NLA
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Googling 911.110.929.00, there are a few hits. Including a supplier showing a used one in stock, if yours cannot be cleaned or convinced to work. I guess scavenging a working switch off another AFM would be an option.
Good luck!