Hello and welcome to JA, the factory spec for battery draw is .050 mA or 50 miliamps, the first question I have is there any aftermarket accessories installed? Radio, guages, alarm, remote start?
There is an aftermarket radio, that is the only aftermarket add-on.
The radio was installed before we purchased the car 2 years ago.
This problem started about a 6 weeks ago.
Sorry for the delay...this problem apparently comes and goes. I have tried to see excessive amp draw on the battery and apparently it is not occurring now. I took the car to Auto Zone yesterday and had the electrical system tested. They confirmed the battery and alternator are functioning properly. I explained what has been happening, and mentioned that I had heard that possibly the voltage regulator could be sticking and draining down the battery, and he confirmed that was a possibilty. I put a meter on the battery last night after running the car for a few minutes and saw the battery voltage drop from 12.72 volts to about 12.62 volts after monitoring for about an hour and a half. It stabilized and there was no further drain on the battery. The car started with no problem this morning. I plan to continue driving and testing the car for a couple more days and see if I can get the problem to re-occur. Do you have any suggestions on what I could do to accelerate the possible re-occurrance of this problem? How could I test and confirm that the voltage regulator is not occasionally sticking? How can I confirm that the AC clutch is not occasionally stuck on? The aftermarket radio is definitely not the issue...
Merry Christmas and Happy New Year! I would like to figure it out properly, but I have been driving the vehicle for several days now with no further problem. The problem may come back at a later date, but for now it seems to be OK. In the event it does return I will reach back out to you. Thanks for your help.