I've searched the forums, looked at the wiring diagram from Install Doctor's website but I'm still not clear on where to hook the blue wire to the amp that signals the amp to turn on... where to hook it into the Radio. I haven't pulled my radio yet. It is a 6 disk CD changer (factory) in dash. I don't wish to replace the head unit at this point, just want to throw an Amp and Sub in. What wire do I tie into in order to get the "Power-on" signal to the Amp (normally blue wire)?

 

the remote wire? on some head units thre is a spot labeled rem if not use a voltage tester and find out which wire gets power to the head unit when u turn the key and splice it into there useing sometype of crimp connector so it wont fall loose on u

 

Try the Black/Pink Stripe

 

Unlike most aftermarket HU's the factory ones don't usually have a remote turn on wire to connect it to. You can search for one that has switched power as any switched power source will do or you could wire it to the radio fuse in the fuse box that is what I have done when using amps with factory HU's.

 

run then REM wire to a fuse in your fuse box to somethign that will turn on when the key is turned back or forward 1 click... more and likely the Radio Fuse