Trail Tech Voyager Pro Poor Tach Readings

FIRST POST!!! If you know of an existing thread that already addresses this...let me know and Ill keep searching.
My bike is a 2012 te511, recently bought a voyager pro, upgraded from basic voyager that came with the bike when I purchased it. Had a few issues at the start, basically the unit was faulty and not locking onto satellites. TT replaced and the new one locks on almost immediately.
the issue that I am running into, at this time, is the that I cant get the tach to read properly and before the upgrade from my old voyager it was running great.
so, I have tried the wrap method, anywhere from 5 to 7 around the coil...when I do this, I have no signal what so ever, regardless of PPR setting.
I then moved on to direct attachment to the lead wire that goes directly into the coil (red with black line pic attached). that picked up but, if I set it to anything less than 3 PPR, it tells me I am idling at over 12K RPM. At 4 PPR the idle is at 2K RMP but then locks up at 6K RMP and will not go higher.
After reading a thread that mentioned similar problems, I unplugged the positive and negative power supply from the battery and voila!! the rmps at .5ppr were reading properly but, the damn unit wont charge..
has anyone run into this and how did you guys make it work?
I know...does the tach really matter.....not usually but, when you spend that much money...I want all the bells and whistles to work