I tried posting this yesterday, I guess it got lost in cyberspace somewhere. Anyhoo..
I am a tech and I have a crown wave that won't lift from the platform control. It lifts just fine from the base switch. It will also lower from the platform if you have used the base switch to raise it. This is not a model I typically work on so my reference info is limited. It's not setting any codes, but the battery light flashes all the time, although the battery voltage is good. Pulled the handle off, verified power at the switch and power coming out when the switch closes. I cannot find the circuit at the bottom end though. I have a schematic, but the wire numbers don't correspond to the schematic. It also drives very slow and sluggish which I think is a separate problem with the drive motors. I have the curtis handset but there is no parameter to monitor lift request. The harness is my suspect, it is completely obscured by the telescopics. I thought I might be looking at a charger issue, but the battery voltage remains good, even under load and when you use the base switch the thing lifts like a rocket. Any help is appreciated.