<VV> FC Engine Wiring Harness
tony.underwood at cox.net
Fri Jul 24 09:46:06 EDT 2020
On 7/24/2020 7:49 AM, Hugo Miller via VirtualVairs wrote:
> Yes, if it is a 9 volt coil (or similar). In theory. there should also
> be a 12 volt feed when the starter is operated, on the basis that when
> the starter has taken its chunk of the available battery power, there's
> about 9 volts left for the coil. But if that feed from the starter
> (relay or switch) is not there, that rather defeats the pont of having a
> 9 volt coil and resistor in the first place.
> How do you know your wire is a resistor wire and not just a 12 volt
> feed? You can't tell with a volt-meter, as it needs a current draw to
> show up the resistance & you will still get 12 volts on a meter, even if
> it is a resistor wire (I think).
Yeah you can. Pop the distributor cap off, short the points. Either
use a clip lead or just bump the starter til the points close. Turn on
the ignition, measure voltage at the + terminal of the coil. If the
resistor wire is working the voltage will show low, around 8-10 volts,
or around 3-4 volts or so lower than battery voltage depending on the
coil. They vary. To see if the bypass wiring is working, crank the
engine. The voltage on the + coil terminal should be the same as
battery voltage during cranking.
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