Sony MCDX-M3DI , 98 Grand Cherokee

I've just installed a new Sony MCDX-M3DI into my 98 Grand Cherokee with the Infinity Gold System in it. After wiring it in I have found out that the stereo plays over the speakers, however, when I put in a cd it plays on the cd player but no sound comes out of the speakers. It's just silent. Is it in the connections, the CD player or the factory amplifier maybe? Thanks.

Ryan 

I understand what you guys are saying, however, if that was the case wouldn't the radio not work either? If i turn the tuner on radio sound comes over the speakers, but when i turn it to cd it plays on the screen but no sound over the speakers. Am I making sense?

Ryan

The power from you deck going to power up the antenna actually circulates back to the amp and turns it on.  But when you play a cd, there is no power going to the antenna, so you need power to go out to your amp.

I don't know what wire colour it will be in your truck.  But there has been many many discussions about jeep grand cherokee's , and why the speakers don't play when playing cd's.

All the same reason.   I just wish harness manufacturers would put the dang wire in the harness.

Do a search and you will find your answer.

Hey thanks guys. I was just confused. Unless you have a good site for me to check out that has my jeeps layout, i will begin to search on the web. Thanks again.

Ryan