[Shotimes] Tach Again

[Steve Weinrich]

The signal that drives the TACH is generated in the DIS module as signal
IDM.  It also goes to the PCM.

On the 89, it is the GRAY/ORANGE wire on connector C1 of the DIS module.  C1
is the connector with five wires, C2 only has four.

Steve
----- Original Message -----
From: "D Potter" <jpotter8@bellsouth.net>
To: <shotimes@autox.team.net>
Sent: Friday, January 03, 2003 1:39 PM
Subject: Re: [Shotimes] Tach Again


> I don't have my CD on this laptop, but I can tell you that the SHO's tach
is
> not attached to the ignition coil. The older SLO's can do that because
there
> is a single trigger signal going to a single coil. Divide by 6 and you've
> got your rpm. IIRC, the tach signal for the SHO is tapped off the base
> timing signal, either before or at the PCM. If you don't get an answer
> later, I'll try to get on my server and find out the info for you.
>
> DP
>
>
>
>
> ----- Original Message -----
> From: "Jonathon Beisler" <JBEIS001@stvincentshealth.com>
> To: <shotimes@autox.team.net>
> Sent: Friday, January 03, 2003 1:19 PM
> Subject: [Shotimes] Tach Again
>
>
> > Okay, all, I know that this will be the third time asking but I wanted
to
> know if any one had any ideas about where the Tach is connected to the
> engine. I looked under the Electronic Ignition section in the Helms but of
> course, under the tach connection sub heading all that it has is a warning
> not to ground the connector as it will damage the ignition coil.  I swear
> someone upstairs doesn't want me to get this fixed.  Just for the hell of
> it, I looked under the distributor ignition section and the tach there
> connects to the ignition coil.  Does anyone have a Helms that would be
> willing to check and see if their's mentions where the tach actually
> connects?  The section for this in my 94 Helms manual is 03-07B and the
tach
> connection is listed on the 9th page of that section.  I am at my wits end
> and I am about to pull out what little hair I have left.
> > Thanks guys, Jon B.
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