That relay is likely tied in between the safety and a leg on the PTO switch I'd think. I've never replaced one, and I suppose I could dig and see if I have a schematic if you need to know. The engine is likely not starting for one of two reasons. No spark or the fuel solenoid under the carb isn't activating. I remember only one fuse on these -correct? So, verify spark. There could be a ground in the wire that heads under the shroud to kill the coil. You could for test purposes pull that wire from the coil and try again.I would think it is a possibility that power into the coil could have fried the cd in the coil. Plan on picking up a relay- they must be cheap. So if your version has the 3 terminal regulator, the 2 outside put AC in from the stator and Dc out the center. If it isn't making it's way to the battery, the first thing I look for on this vintage Deere is follow the wiring . Many times in the lower part of the loom behind the engine you will find trouble- or even rusty terminals on the switch on some

I have several you may have. I am in Lewisville NC, which is just outside W-S. I think you came to my swap a few yrs ago? There is a plant swap about a mile from my home Oct. 14th if you can come at that time. I will be making a post about the swap at this forum in another minute. Robin Here is a link that might be useful: my trade list

do you still need pots?

YOU GOT MAIL