One more thing...the tach from the '84 that I'm using is wired up as follows pin 4 GND
pin 5 +12
pin 6 coil -
Pin's 1-3 and H+, Hg not used
There you go, I tested it on my 914 and it works properly
http://www.germanlook.com/Forums/sho...ght=944+wiring