One try on #1, run a hard ground wire from the board ground on the back of the panel to a chassis ground behind the dash somewhere (leave enough loop to take the cluster in and out.)

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1984 300D Turbo - 4-speed manual conversion, mid-level resto

1983 300D - parts car

1979 300TD Auto - Parts car.

1985 300D Auto - Wrecked/Parts.


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"If you don't know where you are going, any road will get you there". Lewis Carrol