pocobill7t1 Posted January 6, 2012 Share Posted January 6, 2012 Hi guys,I have just about pulled the rest of my hair out. I am mounting a tach on my steering colum and I cant get it to work White wire to lamps Black wire to ground Green wire to positive of coil Red wire to switched power. I have checked and have a good ground,light lights up in the tach, I have confirmed the switched power wire has power when I turn the ignition on. I have checked all connections and all is tight, I don't know if this make a difference but I have a Petronix ignition under the cap,I am stumped any ideas, it is a new tach and the setting is set to 8. Thanks Bill Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted January 6, 2012 Share Posted January 6, 2012 Dosent the green wire go to the negitive side of the coil? im pretty sure it does. Quote Link to comment Share on other sites More sharing options...
pocobill7t1 Posted January 6, 2012 Author Share Posted January 6, 2012 I was thinking that but the instruction were poor and showed one picture with the green to the positive. I did not want t fry the electrical but I will wait till others chime in,thanks very much.Bill Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted January 6, 2012 Share Posted January 6, 2012 Yea I just went and looked at mine the green gos to the negitive side of the coil. Quote Link to comment Share on other sites More sharing options...
Ian Posted January 6, 2012 Share Posted January 6, 2012 Before I put a MSD box in I had the Petronix and the tach went to the neg post. Quote Link to comment Share on other sites More sharing options...
pocobill7t1 Posted January 6, 2012 Author Share Posted January 6, 2012 thanks for the advice, i will try doing this later. I cant believe i tried to follow instructions....... Quote Link to comment Share on other sites More sharing options...
pocobill7t1 Posted January 6, 2012 Author Share Posted January 6, 2012 It works!!!!!!!!!!!!!! i even went back through the instructions and read it ten times and it says hook to positive of coil, i even had my wife read this as well, goes to show some instructions can be wrong as well. THANKS AGAIN..... Quote Link to comment Share on other sites More sharing options...
stangeba Posted January 7, 2012 Share Posted January 7, 2012 You should write or call the company to tell them. Quote Link to comment Share on other sites More sharing options...
cny first gen 71 Posted January 7, 2012 Share Posted January 7, 2012 If I remember correctly mine said that too and it didnt work so I did it the other way like in the old days. Quote Link to comment Share on other sites More sharing options...
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