Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Tach repair

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Old Feb 6, 2010 | 08:02 PM
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Richard Macon's Avatar
Richard Macon
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Joined: Feb 2010
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From: Texas
Default Tach repair

How do I find a circuit diagram to repair my series tach in my 1970 mustang?
Old Feb 7, 2010 | 03:19 AM
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kalli
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Joined: Oct 2006
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From: Cork, Ireland
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most wiring diagrams don't includue a tach and sure as hell no details of the tach internals.
the series tach is wired pretty simple. one wire goes to ignition+ (usually from the switch), the other to coil+, so it's basically in line just like the resistor wire. maybe a third cable for lights..
just checked on the wiring diagram and it's actually in there. see the FAQ in this forums for wiring diagrams
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