> Having just learned that ballast resistors function or don't
> function depending upon whether the starter is operating, I arrived
> at a theory. To test that theory, one morning (prior to starting the
> Toyota) I bypassed the ballast resistor that I had installed.
Pete, I'm having a hard time following this. Did the car have a ballast
resistor originally or not ? If it did, did you check that it was the
correct resistance for your "high voltage" coil. If not, how did you supply
the contacts to short the resistor when the starter is operating ?
> I don't understand this, but I'm sure there's a good
> explanation for it.
If that's really what's happening, then IMO there is something else wrong
with the way the car is wired. However, there being no contacts to short
the ballast, and the ballast resistor value being too high for the Allison
coil, would explain your observations I believe.
BTW the primary purpose of the ballast is to protect the points, or in this
case the XR700. The Crane specs say the maximum coil current is 4.5 amps,
which means the coil DC resistance plus the ballast resistance has to be
over 3 ohms. Some aftermarket coils do not work properly in this
configuration, and so cannot be used with the XR700.
Randall
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