Originally Posted by old_newbie
Update on dash.
Well it looks like I need to find another dash. I removed it cleaned all contacts and reinstalled it. Checked all of the grounds and started it up - my dash worked!!! - for about 5 min. until it warmed up - ping and all guages (except the tach and speedo) go dead. Took it all out again and cleaned it and looked for bad solder joints. Put it back in, worked again for about 5 min.
This is the pattern it repeats now, when it is cold in the morning it works fine, as soon as it heats up they go dead. Bad component in a circuit card I assume.
Failure upon heating up is one of the classic signs of an annular ring crack. This type is almost invisible when the joint is cool.
When I am confronted with this type of failure I think like a solder joint. The joints fail mostly due to vibration (coupled with bad manufacturing control, but that is another topic). Some fail due to heat but these are pretty easy to spot, look for the scortching. Reflow all joints that go to cables between boards, connectors to gauges, etc. Get anything and everthing that looks like it can be shaken.
Don't lose heart. Just perservier. You are smarter than a solder joint.