2004 civic radio issues
 

I am changing the head unit in my civic, and trying to figure out the wiring.
Unfortunately, the previous owner has diked the harness off, and I just have the wires. It's fairly obvious on most, what they are. The 2 in question are the solid red and the red with black stripe. The white/red and the yellow/red are the power, but these other 2 I'm not sure of. Thanks

Those are the dash light circuit, you should just isolate them unless your head unit is one of the very rare ones that can be wired for variable lighting.

Really the best thing to do here is to cut the radio plug out of a junk car and splice it back to your harness. Then you can use a standard harness adapter and your next radio swap will be real simple.

Thanks for the reply. I'm actually putting in a "non factory unit" that is iphone compatible, thus the issues in figuring out the wiring. I wish the plug had been left alone originally.