MikeC4
Posts: 22
Joined: 8/16/2007
Status: offline
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 Hi all,
Over the past 12 months I have been fighting a digtial dash problem and I think I solved it. When ever my 1990 would run for at least 30 min. and the car was well warmed up (summer time in Florida), the numbers and icons in the display would scramble, disappear, and the re-appear. Half the time I did''nt know how fast I was going or how much gas I had. The problem would lesson on days that were cooler. After tearing apart the dash checking wires and harnesses several timee, taking apart the speedo and resoldering many of the connections the problem was still there. I even replaced the computer under the hood with no change. In the mean time I purchased a factory manual. I found that there is a seperate computer, behind the radio that controls all the interior electrical functions including the dash and speedo. One day I had the center dash apart I could see the computer and the wire harnesses connected to it, one of which is from the speedo. Because some one before me had cut away part of the inner plastic box that holdes the radio to mount a different one, I was able to get my fingers around the wire harnesses and push up on them to hopefully cause a better connection. The dash computer is buried deep behind the center dash and access is usually gotten from the drivers side after taking apart many panels. Big Job! Bottom line, by me pushing on the multi pin connectors I must of made a better connection because now the speedo works fine. I had to wait until now when things are hot out side again to be sure. So far so good! Hope this helps some one with the same problem.
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Printable Version
Digital dash scrambling problem solved! - 
