[DeTomaso] Tach Issue ...

[PersoCaddy at aol.com]

Hi, check the resistance between all the terminals of the 8920. It is just  
a step up transformer. There should be readings between the primary and 
itself  and the secondary and itself. Pat Orlando 1972 Yellow Pantera S/N 4011
 
 
In a message dated 4/16/2010 11:35:59 P.M. Eastern Daylight Time,  
eanderson at geotracinternational.com writes:

Chuck,

Unless something miraculous happens over night, I am  going to return the 
tach adapter tomorrow. 

I like your line of  thinking. 

Thanks,
EA



----- Original Message  -----
From:  Charles Engles <cengles at cox.net>
To: Erik  Anderson
Cc: detomaso at realbig.com <detomaso at realbig.com>
Sent: Fri  Apr 16 21:27:31 2010
Subject: RE: [DeTomaso] Tach Issue ...

Dear  Erik,


It might be  possible that you have a bad 8920 tach adapter.  I
once bought a new  MSD 6AL from Summit and it was bad right out of the
box.......It is a  remedial suggestion, but I am very remedial  with
electric/electronics.


I hate electrical gremlins,  Chuck  Engles




-----Original Message-----
From:  detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]  
On
Behalf Of Erik Anderson
Sent: Friday, April 16, 2010 10:21 PM
To:  De Tomaso List
Subject: [DeTomaso] Tach Issue ...

Good evening,  folks.

A few weeks ago, I installed a new alternator - the Delco si12  model.
Because this alternator has an integrated voltage regulator, the  wiring 
from
the alternator to my MSD ignition is a little different.   Working closely
with Jon Haas from Pantera Electronics (what a great guy),  I think we have
the wiring figured out ... but the weird thing in all of  this is that,
although my cat starts and runs as strong as ever, the tach  does not
register a single RPM.

It should be noted that I have a new  tach adapter (model 8920) and a new 
MSD
SS blaster.  The wiring for  those components were very easy and, with a
little (ok, a lot!) of  assistance from Jon, I think we have the MSD-to-tach
wiring correct as  well.  But the tach still won't work.

I have tried almost  everything to get it to work: tried a second tach,
rewired the trigger wire  from the tach adapter to the tach, re-wired the
grounds, checked power to  the tach ... nothing has worked.

So, I ask ... has anyone experienced  this before?  Any suggestions?

Fire away, folks ... and, thanks in  advance for any ideas you have for me.

Cheers,

EA  #3528

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