OK, Thinking-Cap Time...

"Doodybutch" writes:



Diodes are solid state devices which either work, are open (most common
failure), or are shorted out (less common failure). They don't suffer from
"going bad" or "getting weak". They either work or they don't. If they are
intermittant, it's a connection, not the diode itself.


Well, maybe... I have had some larger power diodes whose *internal*
bonds would open when the diode got hot. When it cooled again, guess
what.

I also had a matrix of small-signal glass diodes that tested just
fine with an ohmmeter, but in operation.... turns out some would
"zener" when tested with the 12v that was used in the circuit.

But I really doubt that Jay's issue is alternator diodes....


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