When I first bought my 83 300SD, the tach sometimes would quit working, so I figured I would be messing with that Amp at some point.

But then…I discovered it would begin working when I turned on the headlights….

Then about a year ago, my oil pressure gauge pegged out…so I figured it was the unit on the back of the oil filter housing. After replacing it, the gauge still does not work.

Fuel gauge goes wacky every once in a while…jumps around when it gets low. That might be the fuel sender…but before I go there...

What do you think, are they are all related to a ground issue in the dash?

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dmcginn2
2014 E250 Bluetec
2015 Golf Sportwagen TDI