Im buying a mach 460 6 disk changer from ebay. am i going to need a code number from the seeler in order for the radio to work in my mustang? Im sure the radio gets locked after is taken out of the car. what do you guys think?

 

why are you buying that unit? Why not upgrade?

I'm fairly sure the stock units don't have that feature, to answer your question.

 

I already have JVC unit and it sounds like crap. 2 of the bottom speakers dont work because they were not connected to the JVC unit because there is no where to connect them and i dont want to start cutting wires. I have one of those wire harnesses that adapts to the factory harness.

 

instead of going backward, go forward. Buy new speakers for the fronts. I'm sure you're paying at least $50 for the HU, save another 50 and buy some quality CDT's.

 

your first problem is your JVC headset. Bu a real head unit. The difference is really amazing.

 

connect the blue wires behind the deck, your factory amps are not on.