Our Thule step has stopped working. Thanks to all those with suggestions about fixing it responding to another thread I started. Another issue I didn't mention there is that if the engine is started with the step extended it retracts automatically with a beeping sound that continues till it is fully retracted. But now the step doesn't retract on manual or automatic, but when the engine is started we randomly get the beeping, sometimes even when the step is fully retracted. The alarm is not on the same circuit as the step, since pulling the step fuse does not silence it. Likewise, it's not on any of the hab system auxiliary circuits. How do I stop the alarm? Is it on one of the Ducato circuits?