No offence taken. People hire me. :-)

This WAVE has new type NEO motors installed with only a few work hours. I've checked the brushes few weeks ago during service but I will check them again. I've also checked the part of wiring under the platform and it seem alright.

"Steer throttle" error concerns steering potentiometer and it's wiring. This complete circle is inside left handle. But when I change the complete handle from another WAVE the problem remains.

Any other ideas?