So I have found that by removing Fuse 17in the cabin, which says Infotainment Display Screen in the manual with a 10A fuse, it doesn't drain much overnight, about 10% tops, whereas when left in it almost drains the battery overnight down to 11% at one point for a 24hr period. So clearly I have an big ampage draw on that fuse.

So took the screen out and all connections look fine, and unplugged my GROM Audio in case there was some probelm with that. But I doubt it. Also took my private handset out incase it was that but next stop is maybe internal battery on the siren.

Ideally need my screen until I can upgrade the setup with the new digital one that was posted on here, which tbh is not gonna happen very soon as my time is limited but Ideally I need to resolve this problem now!!

Any ideas as to what to do next?

 

I've noticed that if I leave my car for a few hours the infotainment starts almost immediately, but if I leave it over night it takes a couple of minutes to start up. I'm guessing that it has some sort of "sleep" mode that it goes in to for a while, and then completely shuts down. It might be that yours has a software and/or hardware glitch that's keeping it from shutting down.

Do you have the Naim system? I can't imagine the normal one using that kind of power even if left in sleep mode. So maybe I'm barking up the wrong tree....

 

Hi @jeyjey , no I just have the standard system. I feel you are right but my screen goes off immediately at lock time and should be going to sleep after about 15mins. All roads would say you are right and its keeping the MOST system open, but not sure without a new headunit I diagnose its the problem, and even then I would just change it to the new unit on one of the other thread. It is a hard one to diagnose tbh.

The reading of putting a multimeter didn't show any draw, but there defiantely is, and when I pulled every fuse in the cabin or boot, it was Fuse 17 that was the only one that showed a voltage change with my in-series meter reading.

My alternator is charging the battery back up easily on a 20-30 min run so I know its deffo Fuse 17 doing it!

The weird thing is I cannot my multimeter (which is new) to show me the draw amount when in 10A mode, but it is definitely zapping the battery overnight according to the Ancel BM200 charts. I wont post them as they wont make sense really being historical and also from various scenarios of charge and discharge. But I have used ChatGPT throughout the last week to chart the problem and it agrees 17 is the problem but it believes its either Phone, Audio or Alarm or Siren doing it. But the manual just says "Infotainment Display Screen" as a description.

Total PITA.