What is going on with my JBD BMS?

[sunshine_eggo]

On the 3 JBD I have configured, this switch enabled effectively disables the BMS:

 

[Brett V]

On the 3 JBD I have configured, this switch enabled effectively disables the BMS:

View attachment 190806

If he doesn’t have a jumper on the switch connections, that might do it. Good catch!