Decided to check mine out a bit…
Some have a USB connector here also, so it’s just the one under the battery.
LIDAR motor
RF-500TB-14350
BN651111
https://www.aliexpress.us/item/3256805589462647.html
Appears to be a minimum 6v motor, would have been my next guess. While I imagine the circuit is protected from back-feeding, I would still unplug it, but I do see they made that difficult by gluing it.
In-circuit I got ~8ohm. You also need to slowly turn it a bit at a time, it always settled at ~8ohm.
Starting vacuum I read 4.4V (belt attached) at the motor. I could see what it does without a belt, but rather not touch that at this time. So I’m probably right that 3V could run it without a load.
Cool design. Some kind of coil to feed power (no-contact) and a photo-diode to receive the pulses/data from the head. Also another place debris could get in and cause issues as it’s only somewhat sealed.
You can find replacements online, so swapping LIDAR heads would probably be okay.