96 Avalon stereo

I just got a 96 Avalon and am having trouble getting a new stereo put in. I read the post here https://www.the12volt.com/installbay/forum_posts.asp?tid=50336&PN=1&tpn=1 but am still having trouble. I'm planning on running new speaker wire from all speakers to an amp in my trunk. and then rca's from my alpine unit to the amp. i'm stuck on how to get the stereo installed though. i'd like to just bypass the amp, but i'm not sure how. the alpine needs an ignition (red) connection, a battery (yellow), power antenna (blue), and a ground (black). what do i need to do? thanks.

i've already cut the factory harness off, but if i have to i can put it back on (though the fact that there are 2 reds, whites, browns, blacks, and green wires will make it tricky). should i just buy the metra 70-8112 adapter and use that? thanks.

look closely on the 2 reds, whites, etc.. and theres prolly a lil thin line thats black or another color, ive never seen 2 of the same color wires, ecspecially that many as ur sayin for the factory radio wires in a car..yeaaaaaaaaaaaa!!!

thats what i thought, but there is no black line or any other such color. there really is just two reds, etc. i guess because its coming from a factory amplifier, but i don't know.

ok i found the difference between the wires, one red has one silver patch on it and the other has two silver patches. same thing for the others. but that doesn't tell me much and definitely doesn't help me piece this harness back together.

Read this. Since you're running new wires to all the speakers, you're already bypassing the amp, so really all you need is a constant and switched source (you can make your own ground).My ex once told me I have a perfect face for radio.