Originally Posted by b17pete
the 12v battery is not being charged by the ima system and i have no ima battery assist or bars that indicate any charge but before i removed the old battery the gauge and system worked fine before i did the job of changing batteries the battery gauge was at half full. Now it seems as if there is a disconnect between the two batteries.
Hmm. This doesn't sound good. Maybe unhook the 12V battery again (just the ground side), turn on the headlights (they won't light, it is just to dissipate whatever charge is lingering here and there in the electrical system), wait 5 minutes, turn off headlights, reattach battery (with everything on the car turned off). Just in case it is a logic glitch - this might erase some stuck bits. My bet is it won't help, but it seems unlikely to break anything worse than it is already broken.
Check all the fuses. Who knows, you might get lucky?
Failing that, I think you need to see a dealer. They can read codes out of the car that cannot be accessed with a regular code reader.
At least one of the computers is in the passenger foot well area, and I have a bad feeling that that odd buzzing sound may have been something shorting out in/near those expensive electronics.