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Re: Re: Dumb question on voltage reads on ignition system
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Posted by Gene on March 05, 2001 at 18:27:19 from (205.188.200.154):
In Reply to: Re: Dumb question on voltage reads on ignition system posted by dick on March 05, 2001 at 18:10:05:
Dick: Thanks for your prompt response. Let me reword what I saw when I checked the voltage. The tractor has a 12-volt negative ground system. The voltage across the terminals of the battery was 12.05 volts. The reading between the negative terminal of the battery and the wire that attaches to the coil (with the wire unconnected from the coil) was 11.79 volts. I assume that is due to a resistor between the coil and the switch (I didn't find it yet). But, when the wire on the coil that comes from the battery is connected to the coil, the read between that post on the coil to the negative post of the battery is 7.54 volts. That drop from 11.79 volts when unconnected to 7.54 volts when connected was a surprise to me. May be normal, but was curious. Thanks again and I hope this helps explain how dumb I am about electrical circuits on tractors.
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