Regarding "Thermostart" wiring!

[Arber]

Hey everyone my Ford tractor has a thermostart feature and I don't know where to wire it, wiring it directly to the ignition switch like on Massey Ferguson tractors wouldn't work since this particular ignition switch only has three modes OFF/ignition ON/Start, normally you'd want the switch to be a momentary or like I said on Massey tractors where it is spring loaded halfway. I'm not sure if Ford intended to use a stand alone momentary switch or? (If you do know of such thermostart switch please post the part number)
The ignition switch is original for this tractor!
Should I' replace the switch with one from a Massey Ferguson so that I can use the thermostart feature?
Thanks.

 

[TractorTech]

You have the original switch, C5NN11N572A r/b 82849165 which was 3 terminal for tractors without thermostart.

For thermostart, you need 4 terminal switch, E7NN11N501AC r/b 82849085 Switch Assy., Heater Starter, Diesel W/Cold Start.
Aftermarket $14 to 26. It will have OFF/Ignition ON/Start/Start + thermostart

Same key