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Tach install

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srvblues:
I have a 67 Mustang, nd I have tach that was installed on th colunm I notice that a wire wire is not hooed up, can someone tell me where it goes and could this be runing my battery down?  Thanks Jeff in Indy

Soaring:
Here is something that may help you.  If not, let us know. 

Where do I connect the green wire on my tachometer?   
 The green wire reads the electrical pulses from the ignition. For most standard ignitions it connects to the distributor primary or negative (-) side of the ignition coil.

WARNING: Do not connect to coil on MSD ignitions. Some electronic ignitions have a tach terminal on the ignition box, the green wire may connect there. Before installation read instructions. For new ignitions without distributors, contact the Auto Meter customer service department for more information.
   
   
 

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