Originally Posted by Einz
Driver side for me was the easiest. It is a bit tight but can be done. For the passenger side, I used the access panel for replacing the fog light bulb. You might need to remove few more fasteners for better access to the horn.
Initially, I only did the driver side, even one horn is better than any MeeMee. I didn't get around to do the passenger side until few weeks later.
Got around to installing them today. Just wanted to give a breakdown for those interested.
-It CAN be done from the top through the engine bay, but I had access issues with a standard socket wrench. It would have been really slow going if I kept going that route.
-While most bolts on the Honda are 10mm, the bolt attaching the bracket to the HRV itself is 12mm. The bolt attaching the bracket to the horn is 10mm.
-I found it easier to remove/install from the bottom access panel, a little tight but you can do it without needing to jack up the HRV.
-I only had to remove three fasteners (same ones you take out when changing the fog lights) and then found it easier to pull the panel down instead of up and back as shown in the manual.
-Once inside, there was a lot more space to swing the socket wrench and I was able to get the bolt out quickly.
-I found it easiest to unplug/replug the power to the horn from up above and then feed the bolt through the hole before going back to the access panel to tighten it up.
-The bracket runs vertical to the horn with the horn facing down.
-I recommend watching the College Hills install video to give you an idea of the horn placement. It's actually easier to access from the bottom panel than the driver's side.
-It's not terribly difficult to unplug/replug the power with one hand and you might be able to squeeze both hands in there with enough access if needed.
-The bracket runs nearly horizontal to the horn with the horn facing down.
-Pay attention to the orientation of the horn and bracket to where it's mounted. By that I mean the horn logo should be facing the front of the car with the bracket behind it at the rear. It may sound obvious to some, but each horn is set up to go on a specific side so that mounting is possible with the power cable able to reach the connector. Again, watch the College Hills video and it will be perfectly clear.
The horn sounds GREAT!