Chorus Installation Problem!

T

Tomasz151

Member
Hi all,

My 2001 1.4 petrol had an aftermarket head unit fitted. This was fitted using adapters from the existing wiring. When I tried to connect the chorus it wouldn't turn on. I think I have bought a chorus 2 and my car may have originally had a chorus 1. Is there any difference to the wiring? Maybe I have just bought a dud! Can anyone spot any problems with the wiring here. It looks like someone has messed with it a bit.

Thanks in advance!

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Before I retrofitted a Concert II in my Fsi it have an Blaupunkt stereo with navigator installed. I used the original connectors but some pins were shifted. I had to check the wiring diagram and compare pin number with the wire color coding and put the back to their original position. It might we worth checking.
 
Looking at the pictures, you will see that there have been two bullet connectors fitted, one connected to the yellow wire in the plug and one to the red wire.

I think that you will find that these are the power feeds.

Some people swap them around for aftermarket stereos, perhaps that is what has happened here.

I wouls suggest swapping them back the other way around, but I am not sure if it would be safe to do that, it may well be but I don't want to be the cause of a burnt out radio.

Steve B
 
Thanks guys! I will have a cautious play tonight equipped with some diagrams and let you know how I get on.

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Your main problem is the chorus 1 didn't use can bus for lights and ignition and the chorus II does. So you are missing the can bus signals to power on the chorus II. You can buy one from ebay that will convert the Power and ignition to can bus signals for you.

http://www.ebay.co.uk/itm/AUDI-Can-...161602?hash=item5b21724802:g:klYAAOSwv0tVN5yW

Also possibly the colour between the dash and a chorus II will be different, gloss black on the dash and soul black on a chorus II so they will not match.
 
I don't think he needs to make any wiring changes, it all looks OK. The chorus 1 didn't need the 20 pin connector for clk/data/enable and line outs as it only has front speaker connections on the brown connector, power, illum and ignition on the black. Simply the fact that a chorus II Needs can bus to switch on and illuminate.
 
craigyb said:
I don't think he needs to make any wiring changes, it all looks OK. The chorus 1 didn't need the 20 pin connector for clk/data/enable and line outs as it only has front speaker connections on the brown connector, power, illum and ignition on the black. Simply the fact that a chorus II Needs can bus to switch on and illuminate.
Click to expand...

Ok its just that it looked like the wiring was wrong from the picture as red/white wire seems to be joined to a yellow by mistake and worth just checking the wire colours go to the correct pins as mine had been messed about by a previous owner who fitted a aftermarket radio
 
I see what you mean, the two wires on the black connectors with red joins have been swapped. This is quite normal when fitting an aftermarket stereo. So they need swapping back over. But it would not stop the radio turning on and off. As it is just swapping the perm live with the switched live. So the radio would only switch on if the power button was pushed and the ignition was on in this state.

But if he swaps the two connectors over (to match the colours) then it is fully back to normal and the radio will still not switch on automatically without pushing the power button on the front.

I've just had the same issue with another guy and an A3 facelift 2001 replacing his concert 1 with a II and he also didn't have can wires. Although he insisted he did. I Pointed out that pins 7 & 12 of the 20 pin connector on his setup were actually missing so no can bus signals the concert II needed. A quick wiring change at radio end and cluster end and he got can hi and lo supplied to the 20 pin connector pins.

Now this setup doesn't have the 20 pin connector for the reasons I posted earlier and I would have to check if can bus is available at the cluster on a 2001 car. But it might be possible to run two wires from the cluster to a new 20 pin connector pins 7 & 12 to provide can bus rather than buying a can bus converter. But only if the cluster supplies can bus and according to Elsawin can bus was only available from 2002.
 
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Craigyb is right; no matter what is done with the connections already available, Generation II stereos won't work without the 20-pin miniISO connector with CAN provision.
A CAN emulator is not required as the existing CAN network can be expanded. I have upgraded many 2000 and 2001 A2s to enable the later stereos to be fitted, an example of which can be seen here: http://www.a2oc.net/forum/showthread.php?29923

Cheers,

Tom
 
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Thanks for everyone's responses. So is it possible to bench test a series 2 radio by just connecting it to a 12v supply to see if it turns on or does it need the other bits connecting?

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