OK, I get being frustrated, but wow! No one cost you $200. If you didn't need an RCM now, you will soon, as they are the #1 electrical failure item in these cars. Second, it is exceedingly difficult to diagnose electrical problems over the internet. Third, battery drain in these cars comes from a few common places, all of which are discussed ad nauseum on this very forum. Fourth, the manual and a DRBIII will do you no good in chasing this problem. Fifth, DRBIII alternatives have been discussed in this forum.