I have a quick question about switch diodes on on whirlwind. For a few years, I have noticed that occasionally the left 10 point rebound switch (possibly a different one from time to time) just below the cellar exit, will trigger the out hole solenoid. Sometimes it also registered the drop target when the extra ball is lit.
This is very infrequent and I decided not to dig into it until now. What I am now seeing in addition is that the locked balls are being kicked out in the middle of a game, presumably because the uppermost one, which is a fail safe for all three balls being locked, is acting up.
Is there a good way to test switch diodes with a dmm, or could it be a different issue?
Thanks