I recently purchased a 1977 F-150. I bought a new Sunpro tachometer at Autozone last week and tried to hook it up. I can get the power and ground to work, because the needle immediately goes to zero. But when I hook up the trigger wire to the coil, nothing happens. Do I have a bad tach? I hooked it up to the coil exactly like the Autometer in my 68, and that one works fine. Is there a reason the duraspark won't allow the tach to work? Is there a different wire I should be hooking it up to? My thinking right now is that the tach is bad. I will hook it up to my 68 tonight and if it doesn't work take it back. Thanks for any ideas and help.
Brian
Brian