Battery Draining Overnight
I have a 2012 v6 stang, but experiencing an issue with the battery draining overnight. Almost to the point where it won't crank up. It could be the parasitic power drain.
Using a multimeter the voltage drops at night from about 12.65 volts to 12.40 volts.
I had a new Interstate battery installed only 7 months ago, and I have been to a couple of shops who told me the battery and alternator tested fine.
I do have a custom radio, a Pioneer AVH-W4400NEX and the Maestro component to link it to the computer. I thought this may be the issue so I pulled fuse 39 Radio/Navigation 20 Amps. But the next day same issue with Battery drain.
I have also pulled fuse 3 SYNC 15 Amps but that made no difference as well.
I don't see any internal or external lights on. One thing is when I got the new Battery it wasn't at Ford so I doubt they did the BCM Reset, can that cause the Battery to drain? Any other ideas?