[V8] Instrument cluster fix

[Ed Kellock]

Thanks Steve. When I plugged the IC in last night after more soldering
repair, the same issues remained. In the morning, everything wad working
okay, as it had done in the past. This morning, everything worked much
longer than it ever has, bit still all three gauges failed in the same way.
T Prior to that, the oil pressure gauge floated up to the peg once or twice
but returned to normal.

It seems like the issues are improving as I do more soldering, but that's
not the result that one would typically expect. Definitely seems to vary
with temperature.
On Jan 8, 2014 10:53 PM, "Steve B" <urq at pacbell.net> wrote:

> I've got similar symptoms on #2.  While my opinions on the whys and
> wherefores may be slightly different, I had done all the standard fixes and
> yet it is still intermittent.  What I found was that by wiggling one of the
> connectors from the car to the IC I could see the gauges react.  It has
> been a while, but I think it was the yellow connector.
>
> I think the problem is that the socket connections have worked loose over
> the years.  My plan its to install longer pins on the IC and hope for the
> best.  I can't imagine changing the connector on the wiring loom is going
> to be a simple task.
>
> You may want to try wiggling connectors as I did to see if you can
> identify bad connections as I saw.
>
> Good luck Ed!
> Steve Buchholz
>
>
>
>
> Ed Kellock <ekellock at gmail.com> wrote:
>
> I know Ingo has reported that he did this and it corrected his issues as
> well.
>
> I have spent the last three nights doing this and still no change in the
> behavior of my IC.
>
> I still have dead fuel and temp gauges and a pegged oil pressure gauge. In
> the morning they will usually be all working correctly, but within a few
> miles, poof again.
>
> Really annoyed at this point.
>
> Ed
>
>
>
> -----Original Message-----
> From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf
> Of
> Mike Arman
> Sent: Thursday, April 08, 2010 9:29 AM
> To: v8 at audifans.com
> Subject: [V8] Instrument cluster fix
>
>
>
> From 2005 posting:
>
>
> > I had similar very symptoms on my V8 - fuel and temp gauges dropped
> > sporadically to zero, came back with a whack on the dash pads. The pc
> > traces were fine, the problem was cold solder joints at the pins that
> > the interboard ribbon cables connect to.
> >
> > These are assembled by "wave soldering" - does the whole pc board at
> > one pass.
> >
> > Problem is that if there's enough heat to solder the big parts (high
> > thermal mass), it is too much for the ICs and other smaller parts and
> > they get toasted.
> >
> > I've seen this on other electronics equipment - *exactly* the same
> > thing, cold solder joints on the large pin connectors - PC power
> > supplies are good for that.
> >
> > Cure is remove the cluster, take the boards off one at a time, and
> > with a fine pencil iron, re-solder the bases of the interboard
> > connection pins one by one. Put it all back together (now is also THE
> > time to change all the burned out dash lights) and dollars to donuts
> > your problems will be cured. I found four bad ones and some more
> > suspect ones. You will be able to wiggle (as opposed to flex) the pins
> > slightly in the pc board if the solder joint is bad. Also, a cold
> > solder joint is "grainy" or "pebbly" instead of smooth and shiny. Use
> > a magnifying glass.
> >
> > Use some contact enhancer on re-assembly just as extra insurance.
> >
> > I did mine almost two years (now SEVEN years!!!) ago, and that part
> > (at least) has worked flawlessly since.
> >
> > Best Regards,
> >
> > Mike Arman V8Q, lights, blinks, starts, runs (be afraid . . . )
>
>
>
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