alxjhn

Gauges not working on 2005 AUdi A8 4.2. Photo attached. PLEASE need help. Middle screen red color. Car starts and runs good. Just replaced brake light switch. ABS and airbag and brake light blinking before brake light switch replacement. ABS module good. (tested and inspected by cheap abs) , battery dies after leaving it sit for more than 2 hours in the drive way. sometimes randomly the radiator fan comes on and blinkers comes on without the engine being on or key in the ignition.

https://drive.google.com/file/d/0B_X...it?usp=sharing

Mister Bally

What do you mean by "tested and inspected by cheap ABS"? If you plugged in a universal scan tool with the capability to test ABS on other cars, you could have activated component protection in several modules. To a dealer you should go. Be happy the car is still driveable.

alxjhn

i went to the dealer and they told me i needed a ABS control module. So i sent it out to cheap ABS in VA, they said there is nothing wrong with the unit. I used VAG com to reprogram the unit. So i did. My battery keeps dying. I ran it there VAG COM, so it said my brake light switch was bad. So i replaced it. I drive it around and came back and let it sit for a few hours and came back to a dead battery. So i jumped it again. Now non of my gauges work or my HVAC unit display doesn't work. The center LCD screen is red. I have attached a picture of it.

Galco

Suggest you charge the battery fully as that may be causing odd displays. I have noticed that if the charge is low, the battery management software in these cars, shut off select electrical items. Once charged, run the scan to see if there are other error codes.

alxjhn

the battery is fully charged.. Still gauges not working... could the battery management module cause these units not to work