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Home > In Car Electronics > Standard Audio Radio -doesn't properly remember last channel |
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dorsetfreelander Member Since: 20 Jul 2013 Location: Dorset Posts: 4354 |
I don't know if this is relevant, but in the days when you had car phones which were plumbed in to the car audio system rather than using bluetooth I had a car that started doing this after a new phone had been fitted and the fitter had wired up the phone incorrectly such that when the car was switched off the power feed to keep the audio in quiescent mode (and remembering stations etc) was disconnected. Is it possible that your 2008 model was once wired up like this? 3 x FL1 2 manual + 1 auto
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18th Dec 2017 9:58 am |
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aesmith Member Since: 10 Jul 2012 Location: Scotland Posts: 76 |
Thanks. As far as I can see from the circuit diagrams, the standard audio fitment doesn't seem to have a permanent live. The radio behaves exactly the same when first switched on, whether the car had been switched off normally or left with the battery disconnected. ----------
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19th Dec 2017 12:42 pm |
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dorsetfreelander Member Since: 20 Jul 2013 Location: Dorset Posts: 4354 |
Another thought is that if the unit has no permanent power feed then there must be a small battery in the radio unit that keeps the clock ticking and the memory working when everything is switched off, (just like the button cells that you get on a PC motherboard to keep the bios ticking over). This battery might be failing after nearly 10 years. If this is the case you would have to remove the radio unit and open it up and see what's inside.
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19th Dec 2017 1:30 pm |
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aesmith Member Since: 10 Jul 2012 Location: Scotland Posts: 76 |
Good point about the clock. If I switch off normally, i.e. switch off the ignition, then when I next use the car the clock will be correct as you'd expect. If the battery's disconnected then the clock resets itself to 13:00. So there must be some sort of permanent live. Although the diagram suggests only one positive feed (from fuse 6 in the passenger footwell), maybe that feed is permanently live with some other signal telling the radio to shut down. ----------
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19th Dec 2017 1:52 pm |
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