[AT] MF 265 starter wiring???

[charlie hill]

I'm working on a friends 265 Massey.  He had to send the starter out to be 
rebuilt and he has a new batter ordered.  Meanwhile I'm trying to figure out 
why the push button wouldn't energize the starter (before the starter went 
bad but while he was trying to start it with a weak battery).  The push 
button switch is working fine according to my Ohm meter.  Does anyone know 
how that system is wired up or where I could find a wiring diagram online? 
Tracing it down without a diagram requires removing more sheet metal than I 
care to deal with.

Thanks

Charlie