[MarkRobinson]

I got my optical pick-up & MSD 6A & blaster coil installed on my 914, but have lost my tach signal.

Originally, the coil had a single + black wire to it, & a pair of wires on the - terminal: green wire from breaker points in distributor, & black/purple-striped wire as well. All are connected, & connected semi-correctly as the car runs ok (though some ignition-off run-on is noted).

Pointers??

Mark