Had the battery empty again after staying few days. MK7 2.2 FWD, 63kw 2007 with 2 batteries. So the 2:nd is close to 0v and have all sorts of issues bc. of that.
I have some extra things attached all the time like navigator on auxilary 12v socket, dashcam, usb chargers, rear camera etc. I think I have tried taking fuse of from the cameras, plugged out the auxilary devices, but still it is the same. I don't think it is the rear indoor light.
I think it could be something like glowplug relay or something but is there an good walkthrough how to check it. btw. charging voltage shows quite high like ~14.9V but not sure if the cheap temp/volt meter installed shows it correctly.
But how should I measure things properly?
I once tried, but noticed that with clamp amper meter there was quite a long time after shutting everything down ~1A drain but it went to 0 or nearly 0 after a while. Could not figure ot within 1-2h what it could have been, but really really would like to solve it out.
It's not plain Finnish cold weather, it is something on the car.