This is my first DIY, but I guess I should give the usual disclaimer: This information is provided as a guide only. Neither myself, nor FitFreak.net is responsible for any damage caused by someone else attempting the following procedure. If you are not comfortable with doing the work yourself, find a friend, family member, or shop to help you out. We all love our cars and want them to last!
1. Remove the stock rearview mirror. If you look at the picture below (which I took after removing the mirror), you will see a small cutout in the plastic base cover (the piece that sits flush against the windshield). The cutout is on the bottom side of the base when it is still mounted in your car. Using a flathead screwdriver covered in a soft cloth or tape or a panel removal tool, work your way up from the cutout area around to both the left and right side. If you look at the second picture below, you will see that there is a plastic tab on each side. They will pop loose if you give them a pull. Once the base cover piece is free, slide it towards the mirror to get it out of the way (see third picture). Now simply push up on the bottom of the base and the mirror will slide up and off of the wedge mount (see the fourth picture).
2. Slide the Gentex mirror onto the wedge mount from the top (in the opposite direction of how you removed the stock mirror).
3. Plug the wiring harness into the back of the mirror.
4. Run the wiring up to the headliner (use the wire cover if you got one, and I HIGHLY recommend that you do). Tuck the wiring under the edge of the headliner (using a panel removal tool worked well for me) as you run it all of the way over to the A-pillar.
5. Here you have a couple of options. You can remove the A-pillar (and break a clip which you'll need to purchase from Honda) and tuck the wiring behind the airbag. I chose not to go this route. Instead, I tucked the wires under the headliner where it meets the A-pillar. I did not need to remove any panels by going this route.
6. Remove the weather stripping around the door frame. I started just above the area where the headliner and A-pillar meet (see the first picture below...you can see the wires coming out from under the headliner and then running down the door frame) and went down to the space between the kick panel and the dash trim (see the area circled in red in the second picture below). Run the wires under the weather stripping and then behind the dash using that circled space as your entrance.
7. There are 3 wires to connect on the GENK41A. One goes to a constant power source (solid black wire), one goes to an ignition powered wire (black with a white stripe), and the third to ground. Using the supplied wire taps (blue 14-18 AWG), tap the following wires in the fuse box to the left of the steering wheel:
CONSTANT - The second row up from the bottom of the fuse box has three green panels in a row (from left to right) The third one from the left has a blue wire and a pink wire running into the top row. Tap the PINK wire.
IGNITION - In the middle green panel, locate the purple wire that runs into the top row, very far right. Tap the PURPLE wire.
8. Take the spade connector from the solid black wire and plug it into the folded edge end of the wire tap on the PINK wire.
9. Take the spade connector from the black wire with the white line and plug it into the folded edge end of the wire tap on the PURPLE wire.
The first picture below is for a point of reference. Notice the fuse box label sticker on the lower left. You know where you are now? Good.
You'll see the wire taps on the pink and purple wires a little closer in the second picture.
10. Connect the ground wire to a grounded source on the frame of the car. I used a bolt near the fuse box. See the circled area in the picture below.
Finished product:
You're done!!! Now you just need to test it out and make sure everything works correctly and then do any wire cleanup and put everything back together. The installation guide that comes with the mirror is fairly good, so hopefully anything I missed will be in there. It covers programming the Homelink buttons, so I won't mess with that info.
Like I said, this is my first DIY. Sorry if it is either too thorough or not thorough enough. Any feedback would be appreciated. If I didn't get the documentation process down this time, I'll try to improve it next time. Thanks!