Posted by John T on April 16, 2016 at 14:42:09 from (72.182.85.137):
In Reply to: 60 John Deere posted by Puska on April 16, 2016 at 08:12:36:
My first suspect is IFFFFFFFFFFFF????? it has a voltage dropping (12 to 6) ignition ballast resistor (IFFFFFFFFFFF it uses a 6 volt coil on a 12 volt tractor) the resistor is bad/open or the wiring TO (Ign switch IGN Terminal to Ballast) or FROM it (Ballast to coil) is bad or open.
CHECK THE BALLAST RESISTOR FOR CONTINUITY AND RESISTANCE AND ITS CONNECTIONS AND VOLTAGES FIRST
THEORY OF OPERATION: When starting the switch on the starter motor sends up battery voltage when cranking to the coil thereby by passing the ballast resistor for improved cold weather starting, so even if the ballast were bad/open she can still fire while cranking HOWEVER when not cranking the voltage from IGN on the switch must pass through the ballast to get to the coil but if the ballast or its wiring is bad/open she stops firing when not cranking.
NOTE this happens even if the ign switch has good voltage to IGN when ON. The switch itself can be fine and your problem (if a bad/open ballast resistor) still exist IE a check for voltage on the switch when ON doesn't address any potential bad ballast condition. Of course, you still need voltage on the switches IGN when on WELL DUH and if not check the switch and its BAT input voltage.
NOTE on some elec ignition switches the ballast may or may not be used the same so insure its wired correct for your elec switch THAT MAY BE THE PROBLEM INSTEAD OF THE ABOVE
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