Ive been trying to decifer the pin connections to make a USB connector, to reset my external controller from 24 volts to 48 volts. I have had this MP2 kit for over a year and it wont run. The new 48v battery I bought from GM is hooked up, but nothing. No lights no response, zero.. So Gary suggested it was the voltage setting was likely at 24 volts. But the USB cable price seemed very high, and I have several cables I can use.
What I have found so far is you plug the USB into the 6 pin white connector, that goes onto the HALL SENSOR HaGreen Hb Blue Hc (yellow) and Red 5volt, and Black Ground leads on the external connector.
On some applications the Hc Yellow is used as a ground, but most 5 pin USB cables only use the Green as Data+, and the Blue as Data -, so the yellow lead is ignored, for the purpose of connecting to a PC to reset the External controllers. All of this information has been gleaned by trial and error, and research, as the GM dealer in Canada was not able to provide wiring data. Hope this helps others who need to make their on USB cable. You'll need a white 6 pin block connector, and one is provided as a spare with the old kits. If anyone knows more, or better information, please reply. For example, does the yellow cable Hc play a role in other applications? As far as I know there are only 2 Data connections in the USB format, D+ and D-. Yet on the USB cable sold for this applacation from GM, there is no ground wire, and there is instead a yellow wire that goes to Hc. Which is confusing...Here is a link to more on the hall sensor discussions.
http://goldenmotor.com/SMF/index.php?topic=5297.msg30391#msg30391
