You guys are awesome, but there is no joy in Mudville.
I detached all wires and carefully resoldered them. I cleaned the contact from the throttle to the core. The wires are all correctly situated. I cleaned the contacts of the so called "U strip" and the tab beneath the the direction/whistle assembly. The "U strip" is beneath the tab. The throttle light dims as the throttle is turned clockwise. The A1-B and A2-B reading is 20V. The U connection readings are all less than 1V.
There is one little thing that is wrong somewhere. What else can I do?