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I have a very old PIONEER car stereo KEH-4090SDK.When I turn off radio for several minutes I lose my station memories!Could you please help?

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  • maddeshi Jul 28, 2008

    Thanks Mike,but this happens with the vehicle still running,so we have to dig a little deeper.


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Hello Maddeshi

There are two power inputs. Normally a red and a yellow.

The red is hooked to the IGN power. When you turn off the vehicle, radio turns off too.

The yellow should be connected to the battery (+12VDC) so it always has power. This is how it keeps the memory, the time.

It sounds like the are both hooked to IGN. Each time the vehicle is turned off, the memories are lost.

Your post says, "When I turn off the radio". If this happens with the vehicle still running, we have to dig a little deeper.

Hope this helps you,


Posted on Jul 28, 2008

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