OK, quick summary, installed adroid head unit in my Gen3. Besides the main power from the ignition it has a standby power input. Since hooking that up it is draining the battery in a couple of days. I installed a remote battery disconnect and it works well. The only problem is when I use that it loses the car settings completely, such as driving mode, clock, and computer etc. That's ok if long storage is required but inconvenient for daily use. For example it doesn't default to ECO mode. I can't remember what wire I spliced in for this standby power, and now wish to cut that off and just power the head unit via the ign switch. Any help for the color code for the standby power wire so I can try eliminating that power input. I no longer have the diagram for the head unit so a bit stuck. Thanks in advance.
I learned to live with parasitic drain with my Gen 3, but it was measured at 50 mA, and was fairly constant, so as long as I drove it once a week, the battery was never dead. My 2024 Prius Prime is a whole different story. I once measured the drain at 330 mA, but it was much worse than that at times. My workaround isn't ideal, but I installed a NOCO battery maintainer under the hood, and I plug it in whenever I can. I also installed an auxiliary 100 mA lithium battery that only comes into play if I need it. I haven't needed it so far.
Thanks ChapmanF, I will look closer at the L40, I guess I did such a good jobe with shrink etc I can't tell what nI did and what the factory did. Lol
I never had an issue before I installed the Android head unit. I was diagnosed with cancer last June, the car sat a lot and drained the battery while I was hospitalized. Been fighting it ever since. I have a new Lithium Ion Hybrid pack, new 12v battery, had it plugged into a maintainer, all was fine until yesterday, wouldn't start, when jumped started but Hybrid error showing, etc. I can clear the error with Dr Prius but I need to cut the wire for the memory maintainer on the head unit, like I said I can disconnet the battery with a remote device but then it loses vehicle memory data including mode. Just trying to figure our, reverse engineer what I did.
