1977-1979 Ford and Mercury - 3 wire factory tach

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3 wire factory tach

Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: 1977-1979 Ford and Mercury
Forum Description: Technical discussion for 1977-1979 Ford and Mercury
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=21426
Printed Date: 26-March-2026 at 10:27AM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com

Topic: 3 wire factory tach

Posted By: rancheromac
Subject: 3 wire factory tach
Date Posted: 14-October-2024 at 11:15AM

79 Ranchero w/ factory 3 wire tach, have msd and tach 6al tach adapter and blaster 2 coil. was my tach trigger wire connected to coil negative(voltage triggered tach) or connected to positive coil(current triggered tach) ? what does 3rd wire go to ? thank you