Well, it took two nights but I just finished up replacing the stock mirror on my 2013 SE Accent with a
that includes auto-dimming, compass, Homelink, and temperature display.
I was going to do a full DIY but it turns out that Hyundai's service site already has detailed install instructions for the factory auto-dimming mirror. I can't figure out how to direct link to the PDF, but if you go to www.hmaservice.com
and click on Technical Training > Install Instructions and filter by 2013 Hyundai Accent you'll easily find it.
Here's a few photos of notable things along the way.
The mirror, temperature sensor, and wiring harness that came in the kit. The pack of t-taps on the right were ones I bought from O'Reilly, but they weren't the right size so I didn't use them.
The A pillar trim removed prior to running the mirror wiring. Unfortunately on the 2013 Accents to get the trim off you have to cut a retaining clip that keeps the trim from going flying when the airbag deploys. It's a $3.60 part, so not too expensive, but none of the dealers in town stocked it. I'm hoping it arrives on Monday. Make sure you replace this clip.
If you don't have it and the airbag goes off that trim piece is going FLYING.
The fuse panel with the completed wiring. While the Hyundai instructions say to use t-tap connectors I couldn't find any the right size and honestly wasn't wild about cutting into the factory wiring harness. Instead I used Add-a-Circuits, tapping into the cigarette lighter circuit (just like the Hyundai instructions) and a spare 10A constant circuit from the fuse diagram. I initially used wire nuts to connect the AACs to the mirror wires, and then when I was happy it worked I took off the wire nuts and soldered then heat-shrinked the connections properly.
Note that if you're using Add-a-Circuit orientation matters. If you find the mirror isn't working (like I did when trying to program Homelink) it means you have the thingy in upside down.
Note that while I was doing this I also installed a cigarette lighter outlet up under the dash and wired it into the same switched circuit, and then jammed a USB charger for my phone into it and routed the cable out to the dash via the gap between the door weather stripping and A pillar.
Wiring the temperature sensor was the hardest part because I completely screwed up on my first attempt. I figured I could get through the firewall up high, just behind the battery. Turns out that hole only goes to the windshield washer motor. I found this out after I got my fish tape completely stuck back there. I had to take the wiper arms and windshield cowl off so I could get the fish tape free. Minor heart attack. Guh. The right place to go through is farther down the firewall:
I used a skewer from the kitchen to poke a small hole in the grommet and then my wife helped feed a starter piece of wire through while I grabbed it from under the dash. Then we taped the temperature sensor wire to it and pulled through. After that it was easy enough to zip tie the wiring harness to other wire runs in the engine bay and then route down to the front bumper:
I just have to remember this sucker is attached when I take the bumper off to do a horn-ectomy tomorrow
The completed mirror! Hopefully this inspires others to do this and if you have questions let me know.