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RE: '86 5KCSTQ speedo intermittent? The FIX. Follow up.
Somewhere you have a loose connection, hence the intermittant operation -
those pins are the likely fatigue and failure point. The ones on mine were
of the appearance of cold solder joints. It would not hurt for you to remove
old solder with wick(important!) and touch up with new solder. Should not
take more than a half hour once you have it apart. Probably under 2 hours
to remove the cluster, take apart, solder, etc. and put cluster back in.
If you need to take to someone, you can put the steering wheel on and drive
for a day without the cluster.
I can't see someone charging more than $15 to clean up where the pins sloder
to the board - if you were here I'd do it for free(beer accepted).
From: Martin Pot [mailto:Paulnet@ipa.net]
Sent: Wednesday, October 27, 1999 5:10 PM
To: Swann, Benjamin R. (BSWANN)
Subject: Re: '86 5KCSTQ speedo intermittent? The FIX. Follow up.
Thanks, for the advice! I took the speedo out, inspected the pins, and they
really don't look very bad. There are 4of them. Should I go ahead and
resolder them anyway, or are there any other likely places that I should
check, since I have it disasembled? I did see somewhat of a hairline on one
of the pins, but am not really be able to wiggle the pin, and see it move. I
have to take it to somebody who is skilled at soldering, since I am not. I
am trying to get it back together tonight so the Q can be on the road again
tomorrow. It really did come apart without much trouble. Appreciate your
responses, Martin in NW Arkansas, nice Q country here.
----- Original Message -----
From: Swann, Benjamin R. (BSWANN) <BSWANN@arinc.com>
To: 'Paulnet@ipa.net' <Paulnet@IPA.NET>
Sent: Thursday, October 28, 1999 6:52 AM
Subject: '86 5KCSTQ speedo intermittent? The FIX.
> Here is the post I sent awhile back -
> Followup Speedometer/Instrument Guage Repair:
> I fixed my speedometer on the '86 5000 CSQT ('87 was the same)
> following some great advice from (thanks!) Alan Cordieros:
> "The problem is almost certainly in the solder joints that hold the pins
> make the connection from the guage into the green flex circuit board on
> the IC.
> Pull the speedo guage out from the cluster, this takes a lot of
> but just careful work, no big deal. On the back you will see three or four
> pins that stick out and make the connection into the green flexible
> circuit board on the main cluster assembly.
> Resolder these pins' solder joints...."
> I did this, and it fixed the problem.
> I noticed that these connections were used to connect most/all of the
> the instrument cluster, and so the fix would be applicable to tach, temp,
> I was surpised at the cold solder appearance of these connections and
> ALL WERE BROKEN!
> BTW it was not very difficult, just take care with dissasembly/reassembly,
> especially when removing the gauge at the pins where they are connected.
> Use a solder iron and wick to remove the old crusty solder and resolder
> proper rosin core and flux as nesessary - good as new.
> Good Luck,
> Ben Swann
> '85 4KSQ
> '86 5KCSQT
> '87 5KCSQT Wagon