Maho MH400e Coolingpump

Hey guys,

My friend is electrician and he is helping me to connect the coolingpump which was disconnected for transport.
It is unknown if the pump is working properly, but everything looks very promising.

We opened the cabinet and he started to measure when I was activating and deactivating coolant M8/M9, but he did not measure anything at all. So He tought that maybe the control of the coolant is broken and not the pump itself.
I cannot really believe that this would be the case, because the whole machine is in veryy good condition.

Would anyone know how to properly measure if M8 and M9 controls still work ?