[TR] Positive or Negative Earth

[Geo Hahn]

Those felt circles are add-ons and thus not reliable.  It is possible that
one of them conceals the usual polarity mark.

In addition to the suggested use of a meter, you may note that the positive
post is noticeably larger in diameter than the negative post.

If, after figuring out the battery, you are uncertain whether your car the
car has had its polarity changed, the simplest thing to do is just decide
which you want it to be (positive or negative ground) and conduct the very
quick & easy conversion procedure.  IOW, you do not need to know what it is
to to the procedure and doing it unnecessarily is harmless.

Geo

On Wed, Sep 10, 2014 at 1:18 PM, Jeffrey Gayton <jtgayton at icloud.com> wrote:

> Greetings. I'm having trouble finding out if my '62 TR4 has been converted
> from positive to negative earth. Online sources say to check and see if the
> grounding strap is connected to the positive or negative terminal of the
> battery. Sadly, my battery doesn't have + or - signs on it. The grounded
> terminal is labelled red, which suggests the car is still positive earth,
> but
> the other terminal is green rather than black. What's more, both the green
> and
> red indicators are rounds of felt around the terminals rather than part of
> the
> battery itself, so I can't be sure that whatever they're trying to
> indicate is
> actually true.
>
> I tried looking online for the battery itself, but couldn't get any hits.
> It's
> a Martech battery, part #27C-715, and it says it's manufactured by Maritime
> Batteries.
>
> Oh, and the terminals are the same size, so I can't use
> the-larger-terminal-is-generally-positive test.
>
> Thanks in advance for any help.
>
>
>
> -- Jeff
>
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