AUTO METER TACH TO MSD 6AL BOX WIRING

autometer tach and msd 6AL box install | For A Bodies Only
Aug 13, 2016I am not getting my autometer tach to run. I installed an MSD 6AL brand new. Instructions and MSD call verified I should use the gray wire coming from the msd box. They also told me the autometer tach I bought brand new needs no extra parts to make it work. Basically I have a keyed on ignition wire which checked live plugged to the positive
How to Hook Up a Tachometer to an MSD Ignition | It Still Runs
Strip the end of the trigger wire for the tachometer, and place a female-to-female connector to it. Fit new wire from the female/female connector, and run the wire directly from the spool through an open point on the firewall. Run enough wire to reach the MSD ignition control box