[s-cars] INOP Tach and Low Oil Press. Indication

[calvinlc at earthlink.net]

I would almost be willing to bet this is a grounding solder joint issue.
Magnifying glasses won't catch cold solder joints.  You need to ohm them
out.  Start at the tachometer and follow all electrical connection out of
the tachometer to the connector.  Ohm from one end to the next and make sure
you have good continuity.  If you don't then start examining smaller
"chunks" with the ohm meter to figure out where the break is.
--Calvin


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of AUDIJIM at aol.com
Sent: Saturday, December 10, 2005 1:42 PM
To: quattro at audifans.com; s-car-list at audifans.com;
Audi5TurboTech at yahoogroups.com; acna_pcc at yahoogroups.com
Subject: [s-cars] INOP Tach and Low Oil Press. Indication


I still have an INOP tack in my 93' S4. As suggested, I took a look into
Scott's SJM site and he didn't have anything in there for my problem. I
removed
the IC and took it apart and used a magnifying glass to hunt for poor solder
joints. None found. I replaced the tach and assembled the IC and finally
reinstalled the IC into the dash. Still inop. When I got gas today, the car
was nice
and warm after driving my wife to work and the tach bounced a couple times
before I turned it off at the gas station, like it was trying to work.

I have the oil low pressure light (a red oil can with a drop falling off the
tip) on now at the center of the dash that says "OK" when you start up the
car. The gauge at the far right of the cluster (oil pressure) indicates that
oil
pressure is OK, as is the gauge next to it, oil temp. Is my instrument
cluster
going crazy? It seems that cold has playing havoc on this car.

Jim
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