[Ford-ferguson] TO-20 Wiring

[David Hoelzeman]

Have a few wiring questions on a TO-20.  Have a new wiring harness and 
it is setup for the warning light, and I have the directions on how to 
wire in an ammeter.  Also have non-standard ignition and light switches. 
  Here are the questions:

1)  Is it possible to leave the warning light in place along with the 
ammeter?  or does the warning light have to be removed from the 
circuitry for the ammeter?

2)  What were the original setups for the ignition and light switches? 
Trying to figure out where they were supposed to be installed on the 
dash.  Was there an option that the lights operated off of the ignition 
switch?  or were they always separate switches?

Thanks in advance,

David