About ready to say "f#@! it

[acschilling]

I'm new...92 XLT. I'm trying to wire a 2 channel amp to just the rear speakers and leave the factory amp wired to the front 2. It sounds great with the new pioneer deck and kw 6x8s...but I want a little more. Anyone know anything about pulling only the rear speaker wires from one of the harnesses to wire to the new amp? This came to me after cutting the plugs off both the harnesses that plug into the amp. Bottom is input and top is output...i believe

 

[Jason94sport]

I would just run new speaker wire to the rear speakers from your amp.
But for wire colors...
Dead Link Removed
You should be able to splice into the rear speaker from the amp however. They will cease to run to the stock amp & run to your aftermarket instead.
But your using crappy 18 year old wiring.

 

[Anime]

What is the amp you're trying to wire, and why are you trying to wire it to the rear two speakers instead of the front?

Usually a standalone amp puts out more power than the internal head unit amp, so you'd want to power the front two speakers with it. If it's a dinky amp and puts out less than the head unit, you should just use the head unit to power all 4 speakers.

Best bet is to do new wires to all the speakers, whether powered with an amp or the head unit.

If you run RCA cables to the factory amp location, then pull the wires from the factory amp harness, you can use the power, ground, speaker, and remote wires from the factory amp harness, and power a 50-60W RMS amp, mount it in the factory amp location, and there you go. Use the head unit to power the other two.

But it sounds like just running speaker wires and using the head unit to power all four would be easiest.