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electrical guru, please!

To: spitfires list <spitfires@autox.team.net>,
Subject: electrical guru, please!
From: Douglas Frank <frank@zk3.dec.com>
Date: Wed, 19 Jun 2002 20:14:32 -0400
Oh god of geeks, accept the humble petition of a penitent software 
"engineer"!

My '73 GT6 has a 9mA leak.   With all circiuts open, something's drawing 
down the battery.

There is a pair of hot (brown) wires from the hot contact of the starter 
solenoid, going to the alternator-- one of the pair, the thick one, goes 
to the middle of three alternator connectors; the thin one goes to a 
second alternator contact (while a brown/yellow wire at the third 
alternator contact goes to the ignition warning light).  This sets the 
stage, I hope.

By disconnecting the thin brown wire at the alternator, or the 
thick/thin pair at the starter solenoid (which share a ring connector), 
the current leak goes away.  This tells me there's a high resistance 
short to ground inside the alternator.

My questions to The Oracle are, what's the thin hot wire to the 
alternator for?  What should I do about this alternator?  Of course in 
the meantime, I'll pull the known good unit off the parts car, but if 
the original alt is rebuildable I'd like to know what fault to look for.

Thanks!  and damn modernity!  and damn Microsoft!  and God bless miniskirts!
--
Douglas Frank    DigitalWhoopsCompaqNoImeanHP Corp.
ZKO              110 Spit Brook Rd.       The older I get,
603-884-0501     Nashua, NH USA 03062       the better I was.

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