wiring aftermarket stereo - help?

[kalvick]

hey guys,

I bought a new aftermarket stereo for my car, the wiring harness I got I matched up all the cables and crimped them to the cables on the reciever.

then there is a second smaller wire harness, the blacks I know go to ground, and the blue and white stripes cables go to the amp. Now I have these 2 RCA connectors. where are they supposed to go? or do I leave them unplugged?

here is a picture of what I am talking about.
http://akamaipix.crutchfield.com/products/2007/120/p120705519-f.jpeg

I would assume, that I need to plug the rca cables into the Front pre amp on my receiver. But do i even need to do this, since the white and grey cables are already spliced into the main wiring harness?

 

[squeak93]

The rca's are for aftermarket amps. If ur using all factory compents (aside from head unit) then you should not need it. In fact, I've never used a part like that....... Whats the part # on it?

 

[kalvick]

this is the link to the model number
Ford Receiver Wire Harness For select 2001-03 Ford Mustang and 2003 Lincoln LS models at Crutchfield.com

on the back of my new reciever, I should also mention its got 3 RCA ports, labeled front, rear, and sub. if that means anything.

 

[squeak93]

They have to be for radios that DON'T already have rca outputs. Not needed in your case as your using all factory stuff and already the 3 required sets on your aftermarket radio. Ignore it. Use the amp turn on though as it will trigger your factory amps.

 

[Brute03]

i'm not sure what the two RCA connetions are for but i added new amps and components so i re-wired the whole car