medusa569 wrote:I just got through with what sounds like the same problem...I have an Ezee battery pack as well and have used it about 6 months although I bought it about 2 years ago. I kept it charged for when I was able to ride. About a month ago it just stopped running when I tried to ride one day...and when i put meter to it it ready 40-41 volts ( 36 volt battery pack) and yet my bike didn't work. I just had some help from another member in my area and he found that when connected to the controller the juice fell from 40-41 volts down to 8-9! That clearly is not enough to run a bike. Although when I opened up the battery pack I didn't see any bulging or other malconditions clearly something is wrong. Try and put your meter to the back of the connector on the controller side and see what readings you get.
If the voltage falls rapidly towards 0v, it's likely the BMS has cut power to the output terminals.
You may have a bad cell or faulty BMS unit, but you'll need to open the case to check connections, internal fuses and cell voltages. What sort of eZee pack do you have? Some go in a rear rack with Anderson connectors, others slide vertically behind the seat and there's a version that goes in a side pannier bag with Anderson connectors.