I installed an on/off switch in the battery to alternator field
windings, thinking I could turn it off, but the alternator self
energizes once it is generating juice. I am wondering if I replaced  that
switch with a three way switch with one contact going to ground the
field windings, if that would stop a runaway alternator. Karibian

Karibian,
I had the same situation with my '86-'88 RX7 alternator.
Once the field was turned on, it will not stop after turning the
field off.
I gutted the internal regulator and installed an external one. There
is crow bar protection on the field wire and I installed 60A
cirquit breaker from Aircraft Spruce on the alt output wire. Now I
can turn on and off the alternator if need be.
Buly



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