I´ve tracked my G3 AT problem to the sensor itself. After the keys were removed I´ve seen that somebody was there before me and placed a 67K resistor between -15 and +15 terminal. It was kind of repair as in Joachim´s topic about his faulty AT sensor.
After I took the rubbers and cover out I started to measure. At working AT sensors it starts at around 14V and the current decreases at each terminal about 2V finally reaching 4V. At T3 I read -0.3V depressed and around 6v pressed.
At my faulty AT sensor 14V is there but the current does not descend at any terminal....I read 14V at the end and -15 at T3.... If any of them not seem to work, does that mean that I have to place 8 resistors in their place?...