For what they cost, they're good insurance. At least, if you think somebody
will turn the battery switch off while the engine is running.

--


Keith
__
Why is it that if you tell someone there are 6.3 trillion stars in the
universe they will believe it,
but if you tell them that your teak has wet varnish they have to touch it?
"BOEING377" wrote in message
...
Are zap stoppers really needed on alternators? These aftermkt devices
claim to
portect alt. diodes against damage from transients. I can't imagine that
engineers at places like Motorola would design alternators that needed
external
aftermarket devices to effectively protect them from transients. I have
never
blown up an alternator from switching it in and out of a load, although
people
say this is often fatal to the diodes. I have run alternators open circuit
(no
load at all) with no problems. Was I just lucky?