Audio Systems: No sound, ford jbl, radio harness

Question
I get power to my CD player but no sound it's a 95 f150

Answer
you need to use the blue wire to turn on the factory amplifier
that is the only problem use the blue wire and connect it to the blue on the radio harness
good luck  if there is no blue wire on the radio harness you need to find the amplifier turn on wire for the factory ford jbl amplifier, you can get the schematic from installer doctor
just search on yahoo they have wiring for all vehicles
good luck