Wiring difference tell me how to wire 2002 caravan from radio/cassette player to radio/cd player

Yes, go to the dealer for a a ECU update with the radio's data. If you had gotten an older radio, cassette,cd player it wouldn't require reprogramming. Best solution is to buy a new unit from Crutchfield on-line and don't forget the wiring harness and faceplate adapters. Some allowing steering wheel control and IPhone/IPad connection.

pull the radio assembly out check to make sure that all your wiring is connected to the radio securly

We don't have wiring diagrams available due to copyrighting. You can access the factory wiring diagrams here.

go to a store were they sell car stero an take your radio an tell them u need a wiring harsent to plug in the radio an plug into the plugs on the car you have dont go to walmart the dont sell them its going to be from car stero store.

see an auto sparks ,or take to a local radio fitting shop ,no good telling me here because colours of wires can vary between manufacturers of both the radios and the vehicles

Your best bet on that one is to go to a place that sells car audio systems or even some autoparts retailers have them,and get the proper adapter harness already made up. A few more dollars but, a whole lot less headaches.

Work in car audio for a living. dodge caravan's are notorious for having there cd player's **** out. if the led display is out the built in reducers for the display power supply are more then likely shot. head to a junk yard and pull one out if you want to keep it stock :)
can prob get it from them for about 20 buck's and it will plug right in were the old one did. or you can go after market head unit (125-900$ at any electronic's store) buy a harness (about 18$) and a mounting kit (25$) for the easyist install :)
hope this helped

The whole front plastic cover over the stereo and heater controls is screwed in with two screws at the bottom of the cover, just above the cupholders. Take out those two screws and then pop off the cover, which is held in place by clips up the sides and at the top. There are four bolt/screws that hold the radio/cassette/cd (whichever you have) in place. Unscrew them and replace the stereo. Plugs SHOULD fit, and if they do just replug it and you're good to go. If the plugs DON'T match up, get a wiring harness from Best Buy or Walmart.
But be warned! Just because the stereos look VERY similar and fit very nicely into the other spot in the dash, they may NOT have matching wiring plugs. I just put a 2003 Neon CD player into my 2002 Caravan, and the harnesses didn't match up and neither did the antenna.
Good luck!

If I unplug all the wires from the CD player won't the security system lock up my stereo system? Which means that I have to go to a dealer to get the code from them.

The 2002 and the 2007 radio connections are markedly different. Remember that the 2007's are "satellite ready"; this changes the back side wiring configurations dramitically.