I agree it seems to be a voltage issue, but strange that the contrast darkens back up after driving a while. I wouldn't expect the voltage on the board to change gradually over time.
Thinking about it now, maybe I'll check the battery. The car is starting just fine but its been in there at least 4 years now. Maybe voltage is low after sitting and something on the board needs time to "recharge"?
I am a whole lot better at working on the old cars- no electronics!
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1969 Lemans vert, matador red, 462 CI, 3.07 12-bolt posi
1974 455 TA, admiralty blue/red interior HPP "cover car" - sold
"The best way to show a car is to drive it"
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