Not sure I understand which cars used a tach amp and which ones did not. If you unscrew that cap and find nothing but a plug, then where did that model take its tach signal from?

I'll have to look at mine. However the tach does work in mine now. Is there an advantage to messing with one that works? Like perhaps a better signal and more accurate signal or just preventive medicine?

Looks neat and tidy thats for sure.

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1983 300D-Turbo - Deep Blue w Palomino MB Tex (total loss in fire 1/5/09 RIP)
1995 E320 W124 Polar White/Grey Mushroom MB Tex
2005 F150 Supercrew - Arizona Beige - Lear topper
1985 Piaggio Vespa T5 - Black and Chrome

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