Hello,
I have Steinbock Boss LE 16-80 MK IV A-1. The steering at slow turning works, by rapidly turning itself off (Led "Leistungskreis" go ON). After the main power re-turn iti?1s work again.
I checked:
1. Endswitches ->OK
2. Steering Electronic (Capacitors)->OK
3. Motor ->? OK
4. Diodes modul ->OK
5. Steering Sensor ->probably OK (2V - (3.5V mitte) - 5V)

Steering electronic LED
Mitte -> OK
Endstupe -> OK
Links -> OK
Rechts -> OK

When the LED Elektronik is ON steering does not work.
What more can not be measured without some documentation.
if anyone has a service manual for a Boss LE 16-80?

Thanks