This drawing I made describes pretty well how to install Power mirrors in your Accord
What you need is :
You DON'T need the whole dash or cabin wires... just wires for the switch!
All the Accord doors come pre-wired for power mirrors (my Canadian LX sedan was). However, the cabin and the dash isn't pre-wired. So, you need to run the wires to the existing door harness. No wires need to be fished in the door.
The door harnesses are located near the door frame where the hinges bolt, you will need to lift the carpet a bit to reach the harness.
You will notice that the door has much more wires than the cabin harness. Some of these wires will be used to install the power mirrors.
First, remove the door panel and manual mirror.
With the door panel removed, locate the mirror connector and notice the wires
color. These wires reach the harness inside the cabin. you will need to tap
those wires inside the car. Bolt the mirror in place and reinstall the door panel.
Then check the switch harness and match the colors. The driver harness doesn't color match but I provided the correct wiring on the scheme.
You basicaly just need to run new wires down to the door harnesses. You will need to tap the wires or just cut and connect them to your new wires.
Once you did that, find a proper power source that will run only when the key is ON. (like the radio wire)
Make sure you fuse it (don't want to set the car on fire!) and voilą! You're done.
