These are the steps after you remove all the panels and the center console. If you need to know how to remove the panels, do a search. It has been covered many times.
Step 1:
Wire up your head unit wires to your factory harness adapter before you start anything so that it's ready to go when it comes time to install it. Some manufactures have different colors so you will have to go by that manufacturers wiring diagram. I did not connect either the blue wire or the blue wire with a white tracer because it was the amp turn on and the amps will no longer be used. I can't remember which one it was so look at the directions your harness came with.
Step 2:
Once your panels are removed, you will be looking for 2 different color wires at each speaker. You will be looking for the following wires:
Brown (LF -)
Yellow (LF +)
Light Green (RF -)
Purple (RF+)
Green (LR -)
Red (LR +)
Blue (RR -)
Pink (RR +)
Remove all the speakers with a phillips head screw driver. For the 2 front speakers you will notice a harness right above the factory amp coming from inside the door panel. Disconnect the harness from the amp and look for the brown and yellow wires for the left front and the light green and purple wires for the front right. THESE ARE THE ONLY WIRES YOU WILL BE USING. All the rest of the wires you can do away with if you choose. I removed all the extra wiring that wasn't needed along with the amp circuit boards cause that stuff is all useless now.
Cut the wires listed above and use the speaker wire you should have picked up to lengthen the wires. Next connect the female connectors to the new wiring and plug them into your new speakers. Screw your new speakers in and your done with the front.
Step 3:
The rear speakers are a bit easier since they don't have a bunch of clutter around them. Locate the harness connected to the rear speakers. Unplug them and look for the green and red wires for the left rear and the blue and pink wires for thr right rear and cut them. You will then do the same thing you did for the front. Lengthen the wires if necessary and connect the female connectors to the wiring, connect the speakers, and screw them in.
Your aftermarket head unit will now be plug and play. Plug it in and your good to go. The new speakers will now be running off of the deck.
I'm really tired and may have left out a couple things so if there is anything I left out that anyone can spot or if I didn't go into enough detail in any steps let me know and I will edit it. Other than that it's pretty straight forward and should be cake for anyone with any experience in mobile audio.