After market tach

[pocobill7t1]

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

[cny first gen 71]

Dosent the green wire go to the negitive side of the coil? im pretty sure it does.

[pocobill7t1]

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

[cny first gen 71]

Yea I just went and looked at mine the green gos to the negitive side of the coil.

[Ian]

Before I put a MSD box in I had the Petronix and the tach went to the neg post.

[pocobill7t1]

thanks for the advice, i will try doing this later. I cant believe i tried to follow instructions.......

[pocobill7t1]

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.....

[stangeba]

You should write or call the company to tell them.

[cny first gen 71]

If I remember correctly mine said that too and it didnt work so I did it the other way like in the old days.