Jetson Ryder Pro jry350-gbl water

[jlw9406]

Lithium batteries use a battery management system (BMS) for safety. The BMS monitors all the cell voltages. If any are too low, it opens a switch on the ground side and the internal cells are isolated from the outside. When this happens, you won't measure any voltage, other than what leaks thru the BMS.

So that's how you get 15V. It's a sure sign the BMS is (1) dead because of water damage or (2) it's found a voltage problem in some of the cells. Neither is really repairable for the average DIY guy.

Can you run the charger's 42V directly to the scooter electronics? It should be enough to light the scooter controls up and let the wheel spin off the ground. Then you would know if it's worth looking for a new battery,

Great idea let me try that thanks , batteries fried for sure I opened it up, it’s corroded and rusted across several connections

 

[jlw9406]

nothin, but for now I’ll wait on a battery, if that doesn’t do it, I’ll pull the rear tire and look at the motor, the controller is in the same compartment as the battery but it does not look the least bit wet or like it’s been wet