I have a Kenwood KDC-X759 I recieved from its original owner, the company I work for. It was taken out for alleged problems (power-up but no function button action, no CD eject) and replaced with a new unit. It seemed too nice a unit to trash, so I brought it home. The Kenwood wiring harness/connector was included, but I have no idea what wires do what, other than the four speaker pairs, the black ground and the red power. The remaining wires are yellow, orange/white and blue/white, and all on the "power" side of the connector. I'm hoping to be able to tinker with it a little and make it work, or at least be able to get it to the point where I can tell what the problems are so I can get it to a service center. Any input would be greatly appreciated.
well this will tell you can also tell you your cars wiring
It is simply poor cabling, replace your RCAs with a higher quality cable that is shielded, consider shilding yourself with steel tubular mesh from any hardware store. I had the same problem, its just the cable picking up all the electrical noise in the car.
The yellow is your memory power, or constant power. Meaning that your red is switchable or hooked up to your ignition. The orange/white is illumition. It get hooked up to your headlights so when your headlights are on the screen gets dimmer. The Blue/White is remote power for an external amp. Im guessing you don't have that so don't worry about it. Hope this helps. And Verner who is talking about wine sound?
There are also a lot of known problems with Kenwood MASK units where the internal ribbon cable that joins the front panel to the main PCB breaks. If this is a MASK unit it may be worth considering this. If it's that what's broken it costs £50-£80 at most service centres to get it repaired or you can buy a replacement cable from ebay for about £12 and do it yourself.