6.8 - 7.2 output Vs at connectors

Accessory brushes (motorized) are not working. Bought brand new (dyson) bin. The output is between 6.7 & 7.2 Vs at the canister input & output terminals. I've destroyed my accessories while testing. Before I order a new motorized brush attachment I'm wondering if this V is correct (when nothing is attached). Both the old & new canisters test exactly the same (6.7-7.2 voltage). Actually jumps ~.5V when blue light max power option is off, drops same ~.5V when maximum blue light power on.