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Old 10-20-2019, 06:57 PM   #9
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City: Anchor Pointe, Ohio
Vessel Name: Sea Moose
Vessel Model: 1976 34' D/C Taiwanese Trawler
Join Date: Oct 2007
Posts: 256
Ford Lehman 120 Alternator Tach connection

Some tachs have dip switches, some have a little screw. That being said unless the two tachs are from the same manufacturer and - and this is a big if on an old boat - the wiring to both has zero resistance and a perfect ground... you won’t get them to match exactly.
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