You probably have a (originally) positive ground tach. They're bigger and
should say positive earth on the face.
The easiest way to find out if it was switched over already is try to take
it apart.
When I did mine it was pretty obvious the unit had never been opened.
I used Lindsay Porters book which made it pretty easy.
Dave
"67 Midget (now fully negative grounded)
At 08:14 PM 4/21/98 -0700, Daryl May wrote:
>My tachometer comes off of a 1967 Midget donor car, which has long since
>been stripped of electricals and related labels.
>
>I am wondering whether the tacho is pos or neg ground, since I gather that
>1967 was a changeover year. Is it possible to tell by looking at anything?
> Or, to get to the point, how can I make it negative ground no matter what
>it is now?
>
>Thanks,
>
>Daryl
>
|