If you have a stock CD/AM/FM head unit in your 2000 XE Xterra, then on the back will be a plug that looks like this:


Take a set of head phones, cut off the part you put over your ears. Now, got to Radio Shack and get an eight pin DIN connector Catalog # 274-026. Solder the wire from the headphone plug into the DIN Connector using the picture above as a guideline showing where each wire goes. Solder one more wire to the number 1 pin and run it to a 12 volt power source using a switch in between. Plug the DIN plug you soldered all of the wires to into the DIN socket on the back of your head unit. Plug the headphone plug into the accessory you want to run through your truck speakers and turn on the switch. The LCD on your radio will switch to the word AUX and the sound from whatever you plugged the headphone plug in will come out of your speakers and be controlled by your Head Unit Volume, Base, Treble, Fade and Balance controls. Any questions?