>Snip
>
> The term "contactor" usually refers to the relay that carries the main
> current supply to the starter.  This is already built in to the starter
> (solonoid).  True, the contactor or solenoid takes a good bit of current to
> actuate but a separate relay to handle this seems like unnecessary
> complication when a *PROPER* switch will do the job.  Just haven't heard a

> compelling reason why this relay is necessary.
>
> Tracy
>
      Tracy,

        I believe Bob's reasoning is to isolate the battery from the starter
 in the rare case of a stuck solenoid on the starter that would prevent the
 starter from disengageing from the flywheel. As you know the battery is wired
 directly to the starter with no means to remove battery power if wired as
 in the automobile. Probably a remote chance of failure but possible.

      Kelly Troyer