I am trying to reverse engineer a digitizer inside an old laptop. I am fairly certain it is a USB device because I noticed a twisted pair of cables next to a ground wire. Just to make sure it is USB I probed the pin to the other side of (what I suspect to be) D-. When I did this I saw different voltages flashing very quickly but nothing close to 5V. I believe the max I saw was 1.2V and min being somewhere around .3V.
I don't want to wire this up to a USB cable out of fear of destroying the digitizer if it can't in fact handle 5V.
This would make sense to be USB VCC if it does offer up to 5V but I couldn't find anything definitive that I could understand at least.