01 Mustang Mach System Wiring

Ok I have searched here google and a couple other sites, and I can only come up with other wiring harnesses.  What I want to know are two things.

1.)  The factory Harness color/pin codes

2.)  Can I take some old RCA cable, cut and splice that and connect the positive and negative from that and connect them to the amp outputs or do I really need to buy a LOC?

Help would be appreciated as I don't want to spend money on the harnesses as the radio is getting put back in a couple of days I am going to connect it a different way without harness or splicing.

So your plan is to use individual connectors for each pin in the harness?  That's not the right/safe way to do it.  Save yourself the time and frustration and purchase the proper harness- it's not a waste of money at all.  Otherwise, it may just be easier/time effective to simply rewire the system completely.  Pull speaker wire to all locations, and your own constant, accessory, and ground and call it a day.

If you won't let me persuade you, have a look on www.installdr.com and see if there's possibly a pinout posted for your car.  Also read the sticky labelled "how to figure out stereo wiring".  Amplified systems will take more time to figure out- much more trial-and-error involved, but can be done.  After you've identified power, ground, accessory, illumination, etc.- you have to choose the correct lead to power up the factory amp.  In combination with that, you have to also choose the proper pairs of wires to test for amp inputs.  Again, it's quicker to just rewire if you're starting with no info.