Help me figure this out

you probably won't find those color wires for the harness you have.

i'm assuuming it's an aftermarket harness, so the colors are different.

what you will need to do is follow the harness further back until you see the colored wires you are looking for running into the harness.

these are what need to be cut and rewired directly into your amp.

this will reduce the load on your head, giving your back speakers more power.

let me know if that doesn't make sense.

take one aa battery and put - on one wire and touch positive to another wire until you hear a slight thump in either speaker , the two wires that made a thump are for whatever speaker thumped. now do it on those wires while looking at the speaker (if you can) and if the speaker is moving outward , that means whatever wire is on the + side of the battery is the + for your speaker and whatever wire is touching - on the battery is - for the speaker. Now if the speaker moves inward while doing that , just switch the wires around on the battery and that will tell you which wire is which.

that's one way to do it.

otherwise your diagram should specify which color is which.

or you can refer to this....

2005 Dodge Magnum Car Stereo Wiring Diagram

Car Radio Battery Constant 12v+ Wire: Gray/Light Green

Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox for switched power.

Car Radio Ground Wire: Black/Light Green

Car Radio Illumination Wire: N/A

Car Stereo Dimmer Wire: N/A

Car Stereo Antenna Trigger Wire: N/A

Car Stereo Amp Trigger Wire: N/A

Car Stereo Amplifier Location: N/A

Car Audio Front Speakers Size: N/A

Car Audio Front Speakers Location: N/A

Left Front Speaker Positive Wire (+): Gray/Violet

Left Front Speaker Negative Wire (-): Gray/Yellow

Right Front Speaker Positive Wire (+): Dark Green/Violet

Right Front Speaker Negative Wire (-): Dark Green/Yellow

Car Audio Rear Speakers Size: N/A

Car Audio Rear Speakers Location: N/A

Left Rear Speaker Positive Wire (+): Dark Green/Tan

Left Rear Speaker Negative Wire (-): Dark Green/Gray

Right Rear Speaker Positive Wire (+): Dark Green/Brown

Right Rear Speaker Negative Wire (-): Yellow/Gray

Kinda confused on what your problem exactly is but ill try to help. 4 channel amp is hooked up by running RCAs from head unit to amp then speaker wire to each individual speaker from the amp both are needed to carry the signal. Running new speaker wire is the best way to put in a amp to your speakers, most stock wire is small and cheap.

just run new 16ga wire it's better that way because you by-pass a bunch of cheap factory plugs that are in the factory wiring.

FUck all that. just cut all that **** out and rewire EVERYTHING so you know what is and what isn't.

^ exactly get a wire fish to fish the wire through the rubber boot in your doors makes life ALOT easier