The orange wire is for faceplate illumination

You may download a copy of the manual here. The instructions for using it with an iPod begin on page 13.

Wiring information is as follows:Yellow = +12V ConstantRed = +12V AccessoryBlack = Ground (Chassis)Blue/white stripe = Remote amp turn-on/Power antennaWhite = Left Front +White/black stripe = Left Front -Gray = Right Front +Gray/black stripe = Right Front -Green = Left Rear +green/black stripe = Left Rear -Violet = Right Rear +Violet/black stripe = Right Rear -
Here is a link to a website that has a PDF document for the Pioneer Owner's Manual:
http://www.manualowl.com/m/Pioneer/DEH-2100IB/Manual/56355

In this, you should find the information you are looking for. I hope this was helpful.

You may have a bad volume down switch. If so, it needs to be replaced.

my iphone pluged in has worked for years with my pioneer deh-2100ib but now when it plug it in it reads set up??

black=negativered=live yellow is for memory witch should be conected to a permenent live blue is for electric areal and the rest are for speakers

I just bought the harness for my car and i did not know if theDeh-2100ib has an illumination wire

Hi I was wondering were can i buy any one of these head units, i really want the Pioneer Deh-p9650. but i cant not find one place were i can buy it. i usto have the 8400mp like 6 or 7 years ago but i sold it and now i want a nother 1... i would really like to buy the Pioneer Deh-p9650mp so if any one can point me in the right direction i would be more then greatful.

thanks

DEH-P9650MP ??

check the yellow wire where it´s put because that wire needs to be connected to direct current always

well there is easy to find installation manual and find out for sure... :)

if my memory is good, upper hole is for aux and other beneath - remote...