When you release the latch from the window frame, a switch closes and grounds a pin in the connector of top control module (C1-16). The TCM then sends a data stream on the CAN BUS to the BCM telling it to lower the windows. But that is not happening...

YOu were back there messing around, is the cable plugged into the TCM? Either the TCM is not talking to the BCM or the ground that should be on C1-16 is not there when you turn the D Handle.