coil wiring

LeftHandwrench · #1 Jul 20, 2009, 09:04 PM

When the switch is in the on position is there 12v power to the ignition coil on a four cylinder gas tractor?

KeepItSimpleStupid · Jul 20, 2009, 10:37 PM

In the old days the coil was fed by a resistor in the on position. While cranking, the resistor was bypassed and the coil got full voltage.

CaptainRich · Jul 21, 2009, 08:28 AM

Quote:

Originally Posted by LeftHandwrench

When the switch is in the on position is there 12v power to the ignition coil on a four cylinder gas tractor?

Yes, there should be power at the coil positive terminal.
The "Negative" terminal is actually the ignition trigger. When it gets a trigger pulse, the coil field collapses and the coil fires.
One terminal will light a test light with the ignition in the ON position and the other should flash a test light during cranking.
I hope this helps.



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