JR, I tried what you suggested and it worked great (actually, I ran the ground wire from a screw on the back of the metal tach housing and tapped into a ground wire for one of the other instruments. Thanks much for your help!!! But the right turn signal indicator still doesn't work; may try another ground to see if that does it. Thanks again, Andy

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2005 Mercedes C230k sport sedan, 6 speed
1987 Porsche 924S - 968-engined track car