I have a TO-30 Ferguson tractor and I want to install electronic ignition; is there a wiring diagram available? May 18, 2015.
AThe manufacturers of these systems, like Petronix, include installation instructions, and wiring diagrams with their products. I suspect you can go to their website, http://www.pertronix.com/to obtain a copy of their installation instructions.
As for a wiring diagram for the TO-30, our website has a copy of the original 6 volt positive ground wiring diagram for the TO-30.
There is also a simple diagram for wiring a 12V Delco alternator with an internal voltage regulator. If you or someone has converted your tractor to 12 volt negative ground, they may or may not have wired it according to this diagram. When converting to 12 volt positive ground you must also change the wiring on the coil, connecting the positive primary terminal to the switched side of the ignition switch. You also need a 12 volt coil with an internal resistor.
The original 6 volt coil with internal resistor can be used if you use a step down resistor, 12 volts to 6 volts. If you are using either a 6 volt or 12 volt coil without an internal resistor, you will also need the external resistor for the coil. The coil resistor plus the step down resistor is needed if you are using a 12 volt coil without an internal resistor.