It is possible to remove a tach from the dashboard and connect it to the
proper places with jumper wires to check whether a fault might be in the
wiring harness. You would have to determine the "proper places" with the
use of a wiring diagram. There is a difference in the external tach wiring
between the earlier tachs and the later ones.
However, I think it is highly unlikely that tapping on the tach face could
make the tach work again if the problem is at some remote point in the
wiring harness, as opposed to being inside the tach itself, or in the wiring
immediately attached to the tach.
Steve Byers
Havelock, NC USA
'73 Midget GAN5UD126009G "OO NINE"
"It is better to remain silent, and be thought a fool
than to speak, and remove all doubt" -- Mark Twain
----- Original Message -----
From: Jeff Boatright <jboatri@emory.edu>
To: Steve Byers <byers@cconnect.net>
Cc: <spridgets@autox.team.net>
Sent: Thursday, November 18, 1999 9:49 PM
Subject: Re: tach probs
> I agree, but this begs the question:
>
> How do you, or can you, directly connect the tachometer to the coil
> or whatever to test whether there is a fault in the wiring harness vs
> in in the tach itself?
>
> At 9:28 PM -0500 11/18/99, Steve Byers wrote:
> >Hi, Andy!
> >The first thing I would check is the attachment of the wires on the back.
> >Make sure they are connected securely. If they are, then there could be
a
> >loose or cracked connection inside the tach.
> >
> >Steve Byers
>
>
> _____________________________________________________
>
> Jeffrey H. Boatright, PhD
> Assistant Professor, Emory Eye Center
> Senior Editor, Molecular Vision
> http://www.molvis.org/molvis
> Mailto:jboatri@emory.edu
>
>
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