87 Mazda B2000 Wiring, JVC KD-G310

I have my b2000. I bought my JVC KD-G310 the other day. I need help about the Mazda Wireing code. All's I need to know is which wire is the YELLOW and which one is the RED. Right now I have it out, and I have my YELLOW running from a wire I ran from a split wire from my fuse box, and the RED is connected where ever I can. When I turn on the ignition the cd player turns on for 7 seconds and turns back off. Can anyone help me out here? joshpatrick@insightbb.com

the red wire on the radio should be connected to the ignition and the yellow wire on the radio should have constant power all the time.  Get a digital meter and test the wires in the car.  the wire in the car that has power all the time, even when the car is off, should be connected to your yello wire.  Also see which wire gives you power when the car is on and no power when the car is off- this wire connects to the red wire of the radio.