Posted by mkirsch on December 03, 2013 at 05:42:35 from (65.199.189.6):
In Reply to: start on farmall m posted by butch49 on December 02, 2013 at 10:41:38:
Where are you placing the probes?
If you are touching the terminal on the switch and trying to measure at the coil, you will get 0 Volts.
You need to measure from the coil to ground, i.e. the tractor frame or the - battery post. Touch the red probe to the coil, then touch the black probe to the tractor frame.
Voltmeters measure voltage DROP. There is little to no voltage drop from the ignition switch to the coil. There IS voltage drop across the coil, so you get 11 Volts.
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