Have a QT 16 first run. Serial # is 0102241. I have found 2 different manuals, one a service manual and the other a parts manual. Manual P-552591-4, on page 23 shows the ignition switch in the OFF, RUN and START position with internal connections one way. A Parts manual for this same tractor, 552974-2 on page 17 show the switch in those same positions but different internal connections. The second manual show an internal connection between B and X in all positions. The first manual does not show that connection in ANT position. Which of these two is the correct one? Both Manuals are in the manuals section of this site.
I am thinking that a connection between the B and X in the RUN position may be where the short is when the B+ wire is attached to the reg/rect. The ignition switch in my tractor makes the connection between the B & X at all times. Wrong Switch ? ? I tried to get a pic of each page but not that computer savoy to know how to do that. Any and all suggestions will be appreciated.