Jim,
The pic/diagram I posted above is indeed for a two-stage defoster! The big confusion is that it includes a front windshield heater circuit, too. If you leave out the J-47 relay, J-45 diode, and Z-2 heating grid .... the circuit applies to your car!
There is a mistaken assumption in your postings! Terminal #3 is NOT ground ... it is a switched power signal to the 2-stage relay for the second position/detent! The Brown ground wire needs to go to the center terminal of the lamp -- the unlabeled 5th terminal of your switch picture. The #2 & #3 terminals need to be jumpered together ... in order for the lamp to be illuminated in both switch positions. The relay terminal #86 [corrected diagram below] needs to be connected to terminal #2 or #3 of the switch. The wire color can be determined at the relay socket terminal. Likewise, the wire color for relay terminal 87a to switch position two -- terminal #4, can also be determined at the relay socket.
If you have the factory service manual, here is the page you need to be looking at:
