Re: (ET) ET amp meter wierdness

["MR23 \(Christopher M. Meier, Mpls, MN\)" <mr23 mn rr com>]

Where abouts is the shunt wire located (on an E16, prob same as the E20) ?

----- Original Message -----
From: "Tom Coate" <tcoate coate org>
To: "Elec-Trak List" <elec-trak cosmos phy tufts edu>
Sent: Monday, September 03, 2001 11:10 PM
Subject: RE: (ET) ET amp meter wierdness


> Chris -
>
> If the loose or bad connection was in the sense wires that feed up to the
> meter, it would read zero or low.  From the way these things are wired I
> wonder if your shunt wire itself is starting to develop a bad connection.
> This could cause the meter to see a higher then normal voltage.  Since 
> you
> did not see any operational effect, it must not be too bad of a 
> connection
> so far, but maybe this is an early warning sign of a problem that could
> eventually leave you stranded.  If nothing appears wrong with the shunt
wire
> connections, you may want to check them for warmth after a session where
it
> does this trick again.
>
> Also, I don't know how well the amp gauge would stand the full 36 volts 
> it
> would see if the shunt were to open up entirely some day.  It would be 
> bad
> enough to grind to a halt - smoking the gauge would add insult to injury.
>
> - Tom Coate
> E-20, Leesburg, VA
>
> > -----Original Message-----
> > From: owner-elec-trak cosmos phy tufts edu
> > [mailto:owner-elec-trak cosmos phy tufts edu]On Behalf Of MR23
> > (Christopher M. Meier, Mpls, MN)
> > Sent: Monday, September 03, 2001 10:36 PM
> > To: 'Elec-trak'
> > Subject: (ET) ET amp meter wierdness
> >
> >
> >
> > Another oddity.  Don't recall reading about this one yet.
> >
> > Started lawn sweeping on relatively flat ground, as usual, in D, about 
> > 4
> > clicks up the throttle.
> >
> > Look down at the amp gauge, it's pegged.  I vary the throttle setting.
> > Pegged everywhere
> > but lowest click, and even then it's just off the red end.  Try
different
> > gears, same thing.
> > Drive around for a bit, feel all accessible battery and motor
connections,
> > nothing even
> > warm.  Drive some more (10 minutes).  No change.  Feels the same as
usual,
> > sounds the
> > same as usual.  Drive some more, check connections.  Break for dinner.
> > After dinner,
> > start up again, still pegged.  Couple minutes later, look down,
> > the gauge is
> > back to
> > 'normal', and is fine the remainder of the sweeping session.
> >
> > I'm guessing there's a loose or corroded connection on the amp
> > meter or the
> > sense
> > wires going to or at the "shunt" wire.  Haven't looked yet.
> >
> > Like Dave Barden, my harness also has sustained some pulley
> > induced damage,
> > but I've repaired that.  Doubt that has anything to do with it.
> > Anyone ever
> > price
> > a full new wiring harness from Bill?  I'm just expecting to do a
> > repair, but
> > I'm
> > curious about the price.
> >
> > -Chris
> >
>