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 […]
When the battery’s dying, the MMI screen started to make noise and stopped in the middle while going up. I believe it may be its time to die, so I disable the motor from moving up/down every time we turn off /on the ignition. I set the switch to off after the MMI screen is […]
After 11 years, my 2006 A8L Varta original battery 4E0 915 105 A 850CCA died over a few weeks and it no longer held charge. I bought a battery from Walmart EverStart Maxx H8 with 900CCA to replace it. The H8 is the same size as group 49 which is smaller than the original Varta […]
The battery has been great for 11 years, it doesn’t seem to hold charge any more. I had an incident of battery failure yesterday after parking the car for about 20 minutes, the car wouldn’t crank and all indicators on the dash was flashing while I tried to start the car. The battery definitely had […]
My 2006 A8 D3 dash board LED indicator panel lights and the rear LED panel lights were out due to 1A fuse blown. There is a wire broken and shorted on one of the arm rest (bad design). This is how I fixed mine. We need to open the rear vent panel and disconnect 2 […]