When I had a K1600, what you describe happened after, for example, washing, but if the bike was in use and just parked in the garage, I could start it the next day and the ABS lights went out the moment the engine was running and all the instruments were up.If I remember correctly the ABS light should not go off until the system completes its self-check. This requires a minimum speed of six MPH to complete.
Is there any way to "trick" the ABS warning lights... so that they light up with the ignition on and go out when the engine is running?
I don't suspect that the owner has done anything about this, but I don't know.