(ET) E-12 Elect. Prob. (post 3)

[willaim att net]

Problem solved! Thanks to all those who sent advice and analysis. However, 
I traced the problem to a blown R1 resistor. It had flopped forward enough 
to short out on the frame. It blew 1 inch of  resistance strapping, burned 
through the headlight wiring, and the short made the center stud between 
the resistors hot. I was about to trace the mystery voltage that made the 
motor run in reverse with the key off when I found the blown resistor. I 
patched the resistor with metal roof flashing. This made everything work 
fine, so the mystery voltage is still unsolved. No diodes damaged or 
contactors welded. I learned a few things about the E-12 and still wish I 
had a real GE schematic/or wiring diagram. If any one wants a copy of the 
4 page OP631, I will be glad to make a copy of mine and send it to you. 
Thanks again.
Bill Alburty KC