[AJD] Wico Coil and Condensor testing with Multimeters

[Chris C]

Thanks Bill,  I will give it a shot when I get home
from work on Thursday.

               Chris
--- Bill Brueck <b2 at chooka.net> wrote:

> A meter can verify a bad coil or condensor, but it
> can't verify that one is 
> good.
> 
> Different coils will have different resistances, but
> I do have specs for a 
> Wico C coil, I expect the X will be similar.  The
> primary winding is rated 
> at .3 ohms.  Something more than 0 but not much. 
> The secondary winding is 
> rated at 7000 ohms.   And the coil can still fail
> under load, the current 
> from the meter isn't much of a test.
> 
> For the condensor, with the meter on high ohm range
> (x 10,000 or x 100,000) 
> the meter should deflect upon first contact but
> settle down quickly to 
> infinite or very high resistance: several meg.  Then
> put it aside for a 
> minute and do this again.  If the condensor holds a
> charge it will pick 
> right up with the same high resistance.  If it
> deflects again, it is 
> leaking.  Be sure to hook the leads up in the same
> polarity both times.
> 
> Hope that helps.
> 
> B²
> Bill Brueck (brick)
> Chatfield, MN, USA
> 
> ----- Original Message ----- 
> From: "Chris C" <jdnutinwa at yahoo.com>
> To: "ATIS LIST"
> <antique-johndeere at lists.antique-tractor.com>
> Sent: Tuesday, January 25, 2005 1:24 AM
> Subject: [AJD] Wico Coil and Condensor testing with
> Multimeters
> 
> 
> >
> >
> >   Can anyone help me out with this?  My Electrical
> > System service manual is just about useless.  I
> want
> > to test a condensor and Coil on an XH mag I am
> working
> > on,  but I don't happen to own the special 3 lead
> JD
> > tester the book mentions and I don't have the
> charts
> > and tables they refer to either.
> >
> >     Can you test the condensor and coil with a two
> > lead multi meter?  If so can someone guide me
> through
> > it?
> >
> >                Chris
> >
> >
> >
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