I Have A 1993 Honda Civic Dx With No Tach. I Want To Install A 5' Tach From Auto Meter But The Instructions Tell Me Do Not Use If I Have A After Market Coil. I Do Have A 'msd' Blaster Coil '2' How Can I Install The Tach The Green Wire Go To The Negative Terminal Of The Coil Where Can I Put The Green Wire Coz I Cant Use The After Market Coil Any Tips Please.

 

what model no. is the tach?

 

there may be one, but i have never seen an Autometer tach that the instructions said that you couldn't use it if it had aftermarket coil - they all say not to connect the tach to the coil if you have aftermarket ignition and to connect only to the tach terminal - this means if you have MSD 6AL, MSD SCI, etc. ignition, you connect the tach to the tach terminal on the ignition control box and not to the coil - if you don't have aftermarket ignition, just external coil, you connect the green wire to the negative terminal of the coil - Autometer does say not to connect the green wire to the O.E.M. tach signal wire (usually blue) that runs from the distributor to the gauge cluster - Quote: "the signal to the cluster tach is not the same signal as what our tach needs to see (12v square wave)."