illumination wire

I am only concerned with the Yellow and Red wire of the radio.  What is the voltage on those 2 wires with the lights off and then with the lights on.  Black lead on the chassis of the radio when checking.

Ok I tested the red and yellow, the yellow is the constant12v+ and the red is the switched 12v+.  I discovered which wire was causing the charge 12v+ when I turned on the lights, the light green coming from the car so I disconnected it and taped it up.  Now the problem I have is how to get the antenna working correctly, seems like the stereo comes on correct now but once I try to switch to the tunner the whole thing shuts down again and the antenna does not want to go down until I disconnect the stereo.jc

Ok I think I got all the power and antenna issues corrected, the radio comes on right and the antenna goes up and down correct, for some reason now I don't have any sound?  To get the antenna to work I have the blue from the aftermarket radio going to my RED / black wire which should be my antenna trigger.  Then I got the blue/white from the radio connected to a male end similar to the antenna lead that is coming from the car which has a 12v- charge this was part of the two cables plugged into the back of my factory stereo, this one was going to be left over for some reason so I just gave it a shot and the antenna works fine now and the radio is no longer flashing.  At this point I am left with 3 wires coming from my car purple=illumination wire, light green=don't know but has a switch 12v- charge, and a regular green=speaker wire.  So does anyone know of a diagram which would make this scenario corect so I can get my speakers wired up correct, the light green wire is really blowing my mind, it worked in making the antenna go down when I tried it but the radio would cut off and flash.  All I have is a basic volt meter you get when you buy an installation turns red for + and blue for - kit so I am not sure how I can send power through wires to make my speaker make noise to figure things out that way, plus my speakers are covered and I really would prefer to keep them that way.  I think I am almost there thanks for everyone's response. jc

There is a factory amp in that vehicle.  The Blue/White wire of your deck needs to be connected to the wire that turns the amp on.  If you are using a harness it should be blue or blue/white.  If you are not using a harness, I have no idea what color the wire will be.