sly59vette

So I had a VAG code 00856 (antenna amplifier open circuit) code and needed to access the amplifier so I could check out both ends of the two antenna cables RG174 coax with Fakra female ends on them.

One of the connectors was bad, so I ended up purchasing a patch cable on ebay and splicing it in (worked great and fixed the problem).

One challenge I had was figuring out where the amplifier and radio are. The radio is in the Navigation stack in the trunk (driver side). You remove two nuts at the top of the stack frame and one at the bottom and then you just lift it out of the hole, so you can get to the back of it. This stack contains the Navigation DVD player, Sirus satellite receiver, radio receiver, speech recognition unit, and audio amplifier.

I have included pictures of the back side of the two panels that you need to remove to get to the antenna amplifier. The panel along the top of the window just pops out (no screws), while the side panel has one screw (you will see it in the spot opened up by the panel you just removed), and another screw holding on a strap (it will be obvious). One thing to be careful of is the tabs on the side panel that slide into the rear window tray.

sly59vette

Here are the pics for the prior post

eazy211187

I know I'm going out of topic, but is there access to add more antenna's to the amplifier? Reason I want to install a tv module with having the after market antennas being noticeable.

dejoskii

Hi,

I have a similar issue. I have audi a4 2006 (saloon) model. My radio stopped working audio system stopped working all of a sudden. The radio, CD player and my bluetooth sound. I have the audi symphony system and when I switch it on, I get just an on and off flash on the unit, it doesnt give me any sound. I plugged in one of these computers and it gave me the trouble code 00856 (antenna amplifier open circuit)

My first problem is locating where the amplifier is. I have looked in the trunk and cane seem to find where it is...Can you help point me in the right direction please?

enoch861

You might want to post that question in the Audi A4 forum since this is the A6 forum. You'll get better help over there.

sly59vette

The radio receiver unit on an A6 is in the trunk on the driver side of the car behind the side panel. It is mounted in a stack with the GPS unit and amplifier.

mbenno

Reviving an old thread, where can we find this adapter cable?

https://www.audiworld.com/forums/att...patchcable.jpg

sly59vette

It is called a FAKRA connector cable. You can purchase them on Amazon