Scotty,
I have a 2002 Ford Mustang V6 with 96,000 miles (automatic transmission). No codes, but if I let it sit for more than 2 to 3 days, the battery drains. Using a multi-meter, I've narrowed it down to the PCM fuse in the fuse box under the hood. I've pulled the fuses one by one for each of the components that the PCM runs, but there is no drop in voltage. The only time voltage drops is when I pull the PCM fuse itself. Could it be the PCM relay? I've had this problem for quite some time and just lived with it. If I know I'm not going to be driving the car, I just disconnect the negative battery terminal.
Thanks!!
How much was the PCM drain?
Maybe open up the PCM and see if moisture or corrosion got inside.
The drain is .10 Amps
0.1 A is bit high, but wouldn't drain the battery in 3 days. How old is the battery? Sometimes they drain internally.
Battery is about 7 months old
Well try it its not an expense repair to try it. And if its not that return the part and start over..
I am guessing Scotty has a video to find the problem too because if that doesn't work than maybe it can be a short somewhere.
I've heard of things like underhood lights coming on by themselves.
Are you leaving any phone/gps chargers plugged in? I've head of kids leaving things plugged into back seat sockets. Any aftermarket electronics? Remotes/alarms/stereos/cameras?
No under hood light on this vehicle. Also, no aftermarket electronics installed or anything plugged in. Someone mentioned to me that it could be the CD Player (factory installed). There are no CD's in the changer, but he said that the player may continue to look for a CD. Does that make any sense?
that sounds dubious. But you can very easily test that theory by pulling the stereo fuse.