This is a first.

I was tuning several cars today using a LM1 and just moving from car to car. I went from one car to another and then the WB wouldn't read in the scan tool at all. I checked the wires with a meter and the voltage was changing and reading. I then found a way to check the voltage with the V2 unit itself, it matched the meter and was working perfect yet no WB on the laptop. I messed with this for longer than I would like to admit, less just say one laptop battery worth. I tried everything with no luck. I redid wires, changed orange plugs, rebooted laptop, reconfigured pids everything with no luck. Just when my laptop gave me the low batt warning I looked down and the WB was reading on the laptop.

What the could it have been?