Audio Systems: Sony Xplode Car Stereo, sony xplode, electric antenna

Question
I just bought a 2002 Jeep Wrangler that came with a Xplode Drive5 or S. Model CDX-GT210....everything works fine with the radio on but when you play a CD the Bass speaker does not work....the catch is it does work with the FM/AM Radio on...i know somethings about car stereos but i have never seen this before...any advice?

Answer
the installation is wrong pull the radio and switch the blue wires
one is for electric antenna when the player is playing you don't need the antenna and that is why there is no power
they use the antenna wire to turn on the amplifier
there is one more blue wire for amplifiers
good luck