Posted by Jim.ME on December 07, 2021 at 14:08:55 from (67.242.178.40):
In Reply to: John Deere 2010 HELP posted by rubicon1234 on December 06, 2021 at 18:30:58:
It appears there is a serial number break on the ignition switches. Serial number 055380 and before uses switch AR26528 (subs to AR30278) which has the resistor for the ignition made on the back of the switch. Serial number 055381 and after used AT21567 ignition switch and the ceramic ballast resistor AA5791R as in the picture wore out posted. So, if your switch has the ballast resistor mounted on the switch you don't need the separate ceramic ballast resistor. If there is no resistor on your switch you need the separate ceramic ballast resistor. A resistor is needed with a "6 volt" coil. If a coil made for use on a 12-volt system (usually marked no external resistor required) replaces the original 6 volt coil, the resistor would need to be eliminated for either system. The schematic may not show the resistor if it is made on the switch. They may have thought it was not needed to be shown if the proper switch was used and the wire to the coil was connected to the ignition terminal of the switch.
The switch you have in your picture appears to be the AR26528 which does not need the ceramic resistor shown in your other picture.
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