No sound from subs and rear speakers...

it sounds like you have the blue wire (antenna remote turn on) instead of the blue/white wire (amplifier remote turn on) turning on an external amplifier in your rover. the antenna remote wire turns off when you leave tuner mode.

Hi, the RCAs in the back are usually outputs, not inputs. The specs on this unit indicate that AUX input is optional. Are the jacks you're using marked AUX input? If yes, what kind of cable are you using to adapt the iPod to the RCAs? If no, you may need to buy an adapter. There is one here: http://www.crutchfield.com/p_500KCA420I/Alpine-KCA-420i.html?search=kca-420i&tp=120
I got this link from the spec sheet here: http://www.crutchfield.com/p_500CDA9851/Alpine-CDA-9851.html?tp=5684
Please let us know if you have more questions, and thanks for using FixYa.

Get the Alpine KCA 420i adapter. I've had it for about 3 years and no problems. You can install the module anywhere and run the wire for the ipod just about anywhere. You can go through all of your ipod folders on the headunit. However, you will find out quickly that it can be a pain using the Alpine headunit interface tiresome on the CDA 9830 model and others similar from a few years back. I don't know if other head units have solved this issue.

There is a small switch on the unit's housing, switch it to "Norm" position.

you need to purchase (if you do not have it already) the KCA-420i Alpine Interface Adapter for iPod (item # 500KCA420i). and connect it to the aux input socket

1. Make sure your iPod has a fully charged battery before connecting it to the KCA-420i. When you connect it for the first first with low to no charge left, the receiver will not recognize it.
   
2. Check all your AiNet cable connections. These connectors can be finnicky if they are not plugged in ALL the way and can come out when reinstalling the head unit
3. Make sure your head unit is in Changer mode after verifying the above.
   

use one of these http://www.amazon.com/Precision-Interface-Electronics-ALP-M-RCA/dp/B0002IEFBU/ref=sr_1_1?ie=UTF8&s=electronics&qid=1223775360&sr=8-1
with one of these http://www.amazon.com/3-5-Stereo-Male-Two-Cable/dp/B0016LFN2C/ref=sr_1_2?ie=UTF8&s=electronics&qid=1223775403&sr=8-2

yep it sucks but you have to purchase the KCA-420,but its worth it.

I think you need something called a KCE-422I for the type of Stero you have