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

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.

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.