At 05:31 PM 6/19/97 PDT, you wrote:
>I'm attempting to install a Crane XR700 ignition module in a 1979 Spitfire
1500. The DPO had installed a Pirhana ignition many years ago, and I
wasn't getting any spark.
>
>I'm getting battery voltage at the coil with the ignition switch in the ON
position (engine off). Shouldn't I get much less? (like six to nine volts?)
>
>My Bentley Bible predicts (it never seems to tell you for sure!) that
resistance wire is used rather than a ballast resistor. I see the wire
leaving the starter solenoid relay, but it never ends up near the coil. I
can't find any cut ends either.
>
>Since I don't want to blow out the new ignition, could someone tell me what
voltage to expect on the + side of the coil, both key on and start? I
wont actually run the thing till I get some answers....
>
If everything is stock then when in the Run position there is a resistanc in
the circuit,. That may be a resistance wire or a separate ballist resistor.
If the points are open (or removed) from the distributor you will get full
battery voltage on your meter. (the meter is very high impeadance
compaired to the resistor/wire)
If the points are closed then current will flow through the coil and cause a
voltage drop across the resistory/wire.
So the messured voltage is dependent on the state of the ignition points.
==
When the key is in the START position the resistor/wire is bypassed and the
key switch delivers full battery voltage to the coil for starting.
Thomas Howard
LUSD, (619) 390-2627
('72 Triumph GT-6; and a good bit of USA iron)
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