nuckolls.bob(at)aeroelect
Guest
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 Posted: Mon Apr 13, 2009 9:50 am Post subject: Cross reference site for alternator parts |
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At 02:39 AM 4/13/2009, you wrote:
Interesting 'net resource sir. Thank you!
| Quote: | I wired up a blinking RED LED from Walmart (yes Walmart) to my
alternator as it would help remind me to turn off the
key/master. However, I managed to incorrectly wire the LED to the
regulator power (IG) lead and full battery to the light (L) lead.
Result? The transistor that controls the problem light inside the
regulator shorted out.
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Don't you have a flashing light that warns of
under-voltage? The warning light output from
an internal regulator is problematic as to
meaning. It's certainly good notification of
the alternator not turning but it doesn't
annunciate all failure contingencies.
| Quote: | To my surprise, especially after hours going through the internal
versus external regulator debate in the archives, the
regulator/alternator worked fine; Rock solid 14.5 volts, but the LED
kept blinking. Hence my shorted transistor theory.
Probably would not have happened if I had resisted the problem light option.
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I've read that certain "L" connections are current
limited and not subject to the failure you've
hypothesized . . . but without having detailed
design information on specific products, current
limiting cannot be deduced and your hypothesis
is a good one.
Some internally regulated alternators won't come
on line without some sense of continuity through
the warning light to the bus. I had a builder some
years ago successfully fool his alternator into
functionality by tying a 120 ohm, 2W resistor between
"IG" and "L".
Thanks for sharing your experience with us!
Bob . . .
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( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
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