Sender: <marv@lancaironline.net> (Marvin Kaye)
To: flyrotary
Date: Sun, 09 Feb 2003 11:09:43 -0500
Message-ID: <redirect-2013484@logan.com>
From: "Ed Anderson" <eanderson@carolina.rr.com>
References: <list-2013290@logan.com>
Subject: Re: [FlyRotary] Alternator problem
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> Hi Guys,
> My 70amp original equip, (Mitsubishi) alternator does not seem to be doing
> its little job.  My local overhaul man says all its internal goodies are
> just fine and it is generating all it is supposed to do.  Hummm, maybe its
> my wiring?  Here's they current setup. (pun intended)
>
> 1. I have the "s" wire ("R" on other alternators), the field wire, powered
> off the essential bus switched by the master switch.
> 2. The "L" wire runs a dashboard light to the essential bus too.
> 3. "B" wire runs to an alternator contactor, to a large fuse, to the
> battery.  This contactor is grounded through a dash switch.
>
> In an ancient newsletter, Tracy showed a 'check relay' wired into the 'L'
> circuit which I do not have.  My local man said my wiring should be okay,
> but we have no juice...  what gives?
>
> Any suggestions,
> TIA
> Tommy James<><
>
>
 A couple of things.  I presume you have measured the voltage at the "s"
wire terminal at the alternator and it reflects your battery voltage before
the engine is started.  Also make certain that your fuse shows continunity.
Seems I recall that I needed a diode in the "L" line (I also had the relay
coil as does Tracy).  I don't have the wiring diagram, but for some reason
it sticks in my mind that the diode was necessary.

Ed Anderson