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I have a black 1999 Ford F150 extended cab 4x4 with a 5.4L... The digital odometer/tripometer works, but 30% of the time, it randomly goes dim where you cant see it? In other words, it randomly goes black and there is no numbers? It still keeps its miles, but it disappears randomly. Anyone out there have this problem or know how to fix it?
This has happened to many other owners, including me. It's caused by a cold solder joint (poor conductor) on the back of the digital display. The fix is to hit the suspected joint on the back of the display with a pencil soldering iron.