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stereo head unit #900477
14th Sep 2014 7:45pm
14th Sep 2014 7:45pm
Joined: Aug 2011
Posts: 186
wallasey
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alann Offline OP
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alann  Offline OP
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wallasey
hi all, looking for a bit of advice regards head unit, the problem is....

when the ignition is on radio and cd work fine, backlight, station ID all show, start the engine all is lost, no sound, station ID, or cd, the only thing lit is the backlight, turn engine off and it all works again, head unit is wired correctly using an ISO connector, no damaged or cut wires, thanks in advance....

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Re: stereo head unit [Re: alann] #900498
14th Sep 2014 9:46pm
14th Sep 2014 9:46pm
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Wallasey
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Wallasey
sounds like you have no live connected that keeps the memory as the ignition switch cuts auxilliaries to ensure power to the starter.


Fetere sum, ego sum Ergo
Re: stereo head unit [Re: alann] #900539
14th Sep 2014 10:37pm
14th Sep 2014 10:37pm
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wallasey
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alann Offline OP
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wallasey
I thought that but even if car is started first, then radio turned on all you have is the back light, no display details, no station ID, and CD will not play, forgot to mention this is not the factory fitted unit, it is an aftermarket one....

Re: stereo head unit [Re: alann] #900566
14th Sep 2014 11:04pm
14th Sep 2014 11:04pm
Joined: Dec 2012
Posts: 7,253
Our House In Our Road
ZipperClub Offline
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One Way Or Another
Re: stereo head unit [Re: alann] #900567
14th Sep 2014 11:23pm
14th Sep 2014 11:23pm
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wallasey
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alann Offline OP
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thanks zipper, will give it a go tomorrow...

Re: stereo head unit [Re: alann] #900586
15th Sep 2014 7:29am
15th Sep 2014 7:29am
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Wallasey/New Brighton
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j_demo Offline
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Wallasey/New Brighton
Could it not be a bigger problem, ie your alternator?

Re: stereo head unit [Re: alann] #900592
15th Sep 2014 8:47am
15th Sep 2014 8:47am
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wallasey
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alann Offline OP
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wallasey
How would alternator affect loss of radio stations!!!

Re: stereo head unit [Re: alann] #900633
15th Sep 2014 2:00pm
15th Sep 2014 2:00pm
Joined: Dec 2010
Posts: 2,220
Oxton
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I'd suggest checking with a multimeter what current you're getting on the two 12v lines that supply the radio, they're usually red and yellow.

One will be a permanent live that keeps the memory settings, the other will be a live that's only on during ignition.

And if its a Peugeot or Citroen, you're supposed to disconnect the battery and do a BSI reset when changing over a stereo.

Re: stereo head unit [Re: alann] #900649
15th Sep 2014 5:17pm
15th Sep 2014 5:17pm
Joined: Nov 2011
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Wallasey/New Brighton
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Originally Posted by alann
How would alternator affect loss of radio stations!!!

Its just a theory but: no engine running = vehicle powered by battery.

As soon as you turn engine on all electrics powered by alternator.

Dodgy alternator = no electrics.

Re: stereo head unit [Re: j_demo] #900789
15th Sep 2014 11:16pm
15th Sep 2014 11:16pm
Joined: Dec 2012
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Our House In Our Road
ZipperClub Offline
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So if it had no electrics how would the car start? If the alternator was faulty it would not charge the battery. Not the alternator for sure, just needs the wiring on the radio sorting.


One Way Or Another
Re: stereo head unit [Re: ZipperClub] #901019
17th Sep 2014 11:13am
17th Sep 2014 11:13am
Joined: Mar 2010
Posts: 3,902
bromborough/wirral
reddragon Offline
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all stereos I've wired into cars have used red and orange together or red and yellow together to keep memory live hope this helps


ALWAYS REMEMBER BIG BROTHER IS WATCHING YOU:::::::: Have a nice day and an even better one tomorrow
Re: stereo head unit [Re: alann] #901024
17th Sep 2014 12:11pm
17th Sep 2014 12:11pm
Joined: Aug 2005
Posts: 16,291
The Bronx
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yo


if its a sony head unit you need to join the red wire to the yellow and the yellow to the red, they are the opposite in a vauxhall, vauxhall is red to red and yellow to yellow.

LET US KNOW WHAT MODEL YOU HAVE

Oh and ignore dragons comment if you dont want to risk burning your van and tools to a messy pile of ash and rubber.

one wire is memory and one wire is main (ignition on) power which is switched.

connecting both to the same mains supply defeats the object or the manufacturers would of done that in the first place bro wink

Re: stereo head unit [Re: alann] #901252
18th Sep 2014 11:41am
18th Sep 2014 11:41am
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wallasey
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alann Offline OP
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alann  Offline OP
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wallasey
gibbo its a 206, have re-set BSI, but still no joy,

Re: stereo head unit [Re: alann] #901279
18th Sep 2014 2:30pm
18th Sep 2014 2:30pm
Joined: Dec 2010
Posts: 2,220
Oxton
Gibbo Online content
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Do you still have the stock radio to try?

And if it is a Sony, to reinforce what Ste posted, its worth looking at the diagrams in the boxes marked A, B & C on page 2 of this PDF:

http://pdf.crse.com/manuals/4125799211.pdf


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