Ray,
In both my cars the "+" treminal of the coil is shared by the XR700 hot
lead and the 12v. power supply coming from the harness. That supplies
both the coil and the Crane unit with a constant 12 volts. That's the
way both the supplied drawing and the written instructions indicated to
be correct.
All I know is that the set-up seems to work for me, on both cars, for
over a year. Like I said, neither unit has ever felt hot to the touch.
How old is your unit? Is it possible the "correct" wiring requirements
have changed over the years?
Charlie B
>
> Isn't it intended that the Crane unit power come from
> the coil lead? That is where I connected mine,
> I assume it is the intended connection.
>
> The instructions imply (but are not clear!) that the coil
> will be excited at 6V (or reduced per the ballast resistor.)
>
> The statement that "the XR700 requires ballast resistance
> to limit coil current", along with the fact that the Crane
> unit gets its excitation from the coil (thereby being excited
> at whatever voltage is across the coil) would mean that it is
> intended to run at 6V.
>
> The unit, like the coil, will see 12 V whenever key is in
> start position, so it is certaionly capable of some operation
> at 12V, but mine died after 5 months at 12V. It (apparently)
> runs fine at 6V now.
>
> As stated, I recall that I called Crane to confirm all this. Suggest
> again you should follow up.
>
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