This is the first time I forgot the light inside the car and let it sit for 4 days before realizing that the Q7 was totally drained the battery. All the warning lights were on, the door locks didn’t work, I had to use the key to open the door and the hood. It’s been …
Audi electrical system is very sophisticated especially with A8 D3. This is how I understand the system. The electrical system in general includes Alternator, Battery, Power Management System, ECM (Engine Control Module).
It’s been cold and the Q7 hasn’t been driven for a while, the battery drops to 11.4V, I need to charge it. I’ve bought a really good charger from Schumacher SC1280 with 15A capacity. The Q7 battery is under the driver seat, therefore, there are two poles (terminals) marked red for positive and “-” on …
If you see the red and black ignition warning icon on the screen while driving, the car won’t shut off, can’t get the key out of the ignition, can’t start the car… It may not be the ignition switch, it may be the start authorization module under the driver seat carpet getting wet from AC …
So, I got tired of switching on and off my bluetooth and raspberry pie in the trunk, sometimes I forgot and both of them running all day, I created a 12V line today, only on when ignition is ON and off when the ignition is off. Just need a 12V relay – a fuse line …
