[Tim]

Thank you SSBGLA45 and johfinz for responding. I will try to eliminate or determine if these are the causes.

SSBGLA45 - This answer seems a real possibility. I notice my car is making no noise at my office after being parked 4 hours right now. But frequently I drive home 17 miles. Go in eat dinner, read the paper and maybe watch the news. I go back to the garage/barn with no electricity and it is making the noises. I need to verify but I think I can also go out on a Saturday morning after the car has been sitting all night and hear the noises in the morning at times. I will start recording the times and see if I can determine a pattern. But I can tell you after driving the car for 10 months pretty much the same everyday and I have no sense of a pattern and am sometimes shocked it is making noises and worry about battery life.

Johfinz - I did have a mp3 music player plugged in to the usb port continuously. I will plug it back in and see if that could have been the cause.

I think I will check if it is related to when I have my phone on me and wonder if it is the bluetooth activating in the car when I am near it. That's not it. Just checked.

 

[Tim]

Last night I went home and parked my car outside as I had an evening meeting. An hour later I went to the car and it was making the noise. I went to pop the hood and when I opened the driver door to access the hood latch it stopped making the noise. I pulled the hood lever, shut the drivers door and opened the hood. About 30 seconds after I opened the hood it started the noise again for about 5-10 seconds then quit.

Thoughts?

 

[Tim]

I think I have noticed it with the key fob in the house still I will double check that. I did not have the doors locked in the above mentioned sequence so I did not use the fob for anything. But it was in my pocket. I don't have the key less entry or whatever the key solution is that I know of.

The leaving it for a couple of days and it sleeping kind of sounds familiar to mine. I will keep testing.