The dealer I bought the car from put in a cd / radio to replace what was there. It is secondhand but that is no big deal as it works.

The problem is that it does not remember the settings made once the car has been turned off. I was told by the people who checked over the alarm that the wiring to supply power all the time has been redirected. In the back or the unit all the wires that connect to a large plug are ok except one which has been cut, could this be the power supply? If there is no permanent supply how does it work in the first place?

I assume the large black wire is the aerial?

Thanks

G

 

You should have a continuous live wired up for memory presets etc and a switched live for main supply when key turned.

 

buy the correct conections for your car to the name or make of stereo you have could get them from halfords today m8 hope this helps

 

The unit will require a permanent live to maintain the settings and the main unit is powered by a seperate ignition fed supply usually so that the stereo turns off when you take the key out.

Does the unit light up when turned on or is there a seperate illumination when you turn the car lights on?

The really thick 8mm or so black wire thats probably on its own will be the aerial lead.

The best thing is to get a circuit tester (a glorified piece of wire with a small 12volt bulb inline) this will show whether you have a permanent live feed or not.... what colour is the cut wire you mention as this could be for an electric aerial (which the subaru doesnt have usually ) or something.

 

Could just be the lives want swapping round, is the stereo working without the ignition being switched on??

 

No, only works with ignition on.

 

Illuminates when it is turned on. The cut wire is blue with a white stripe down each side.

I have tried to find a wiring guide for a JVC KD-S621 on the web but no luck.

 

Easy one this!! Cut the red and yellow wires comming from the back of the stereo towards the single rectangular plug and join the red to the yellow and then the yellow to the red. We change almost all our JVC units as the wires are the wrong way around for some reason
Dave.

 

Thanks for that- but they already are connected yellow to red, red to yellow, which I thought was a bit odd. I noted that the red to yellow (red from the rectangular plug) has 2 wires in the connector, the second is bare at the end and floats in space- should this be?

 

If they've already changed the red to yellow and so on it may be worth a try changing it back. If that doesn't work it'll be easier to spend £50 on a new cd player than reprogramming each time you drive.

 

I would get a hold of a voltage tester and test the wire that is loose, test it without the key in the ignition and then with the ignition turned to position 1 and then 2.

One wire will feed +5v (with the ignition off) and the other will feed +12v when the ignition is on 2nd position.

When I wired up my Pioneer I connected the red + yellow wires (+12v) to the red on the stereo and then the the other yellow (+5v) to the yellow wire on my stereo, this ensured the stereo got a low voltage feed and didn't lose it's settings but switched off correctly (I think the -5v feed causes my stereo to switch off).

 

I am most of the way down that road (new unit) but wanted to see if I could fix it myself. I will try changing the wires back and see what happens.

 

You have a PM mate

 

I went to do this and tried turning it on before changing the wires and now it is dead! Changed the yellow back to yellow & the same with the red to see what would happen anyway, - there was a whirring from inside the unit but still wouldn't turn on. Fuses are ok.

I have jiggled wires to see if there is a loose one, but no go, and unfortunately I have no testing equipment. Any clues on this one?