Senior Tech Team
Join Date: Jun 2006
Location: White Bear Lake, a northeast suburb of St. Paul, MinneSNOWta
Re: Tach gets interference from headlights, brakes, and horn
Which Autoguage Tach -- is there a module for the Tach? Which HEI (GM or Aftermarket)? Find the factory instructions for the Tach and reinstall it according to the instructions. With all respect a tach is pretty simple, only the wire from the HEI (there is a special attachment point for the Tach you know) and the ground count.
Try the tach on another engine/car...
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