[V8] Failing Speedo - Sensor p/n?

[dsaad at icehouse.net]

When my speedo did the same thing as yours Steve - I spent a long time trouble
shooting. To the point of driving around with the dash off and a frequency meter
on the sender wire to the speedo. In my case, the sender was bad. You can test
it pretty easy with a volt meter too - when it stops working, the  sender wire
goes to 13v, and when it is working it is pulsing from near 0 to near battery
voltage.

Dave



Quoting Scott Baumann - PTS Power <scott at ptspower.com>:

> YES - my odometer also quits working, as well as the cruise control and the
> computer goes nuts.  Does this tend to point more towards the IC, or more
> the sending unit?
>
> -----Original Message-----
> From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf Of
> Coleman, David
> Sent: Tuesday, January 02, 2007 9:13 PM
> To: Steven.Buchholz at kla-tencor.com; v8 at audifans.com
> Subject: Re: [V8] Failing Speedo - Sensor p/n?
>
> Does your odo quit at the same time?
>
>
> --------------------------
> David A. Coleman
> BlackRock
> Sent via BlackBerry Wireless
>
>
> -----Original Message-----
> From: v8-bounces at audifans.com
> To: v8 at audifans.com
> Sent: Tue Jan 02 17:15:37 2007
> Subject: Re: [V8] Failing Speedo - Sensor p/n?
>
> .... I'm seeing some odd speedo behavior on #344 too ... very weird ... it
> works fine most of the time, but all of a sudden the speedo drops to -0- for
> some period of time and stays there.  It seemed to be most consistent if I
> took the car for a short errand run ... when leaving the place I'd have no
> speedo ... but I see it mid trip on longer runs too ... after a minute or
> two the speedo comes back.
>
> I had convinced myself it was the speed sender in the tranny because the
> trip computer was showing zero speed as well ... but upon further head
> scratching I realized that the speedo is likely to be sending the signal to
> the trip computer ...
>
> I'd say that before plunking down the bucks for a new sender that you do
> some tests to eliminate the instrument cluster as culprit.
>
> A very long time ago there was a V8 lister who claimed to have schematics
> for the V8 IC ... boy, I would really have loved to get copies of them!
>
> Steve B
> San José, CA (USA)
> >
> > I have a failing speedo (dropping to 0, then springing back up).  I
> suspect
> > it's the speed sensor.  Does anyone have a recommendation (other than the
> > dealer) for a new sensor?  Any known partnumbers?  Thanks!
>
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