I came across a fairly cheap HomeLink mirror for <$70 shipped on eBay so I decided to take the plunge.
Here's the result:
Note: The photos below are for my LTZ model. LT wiring is different so please take note. Thereís a good chance the wiring exists itís just a matter of finding it.
- Torx Driver #20 9/16" Drill Bit - to remove and install mirror
- Small flathead screwdriver - to separate harness from mirror
- Soldering Iron - to build harness (wiring taps would be fine too)
- Gentex 1124 (GNTX-1124) - Found a used one on eBay for $69 shipped. This one came off a Hyundai Elantra. I noticed there's a lot of different models and confusion around model numbers out on eBay so do a little homework before buying.
- Wiring connector from OEM Mirror - I wanted to leave my car intact and didn't want to buy an adapter
- Heat shrink tubing - I like my wiring to be clean
- Cloth tape - to keep the modified harness clean and prevent any noise
- (optional) 12v power supply - to confirm the wiring
- (optional) voltage meter - to test wiring
- Carefully remove overhead cover to access the mirror mount and wiring harness.
This is a two piece cover and requires that second piece to be removed first so you can separate the entire cover.
- Unscrew the mirror so you can remove it.
Right behind the mirror there's a screw that keeps it in place. Use a Torx driver and loosen it.
- Remove OEM mirror from mount
Separate the harness by using a small screw driver to push down on a tab that keeps it together. After that the mirror should slide right out and youíll be left with this:
- Prepare OEM mirror for surgery
Note: I opted to have a clean plug and play install at the expense of my OEM mirror. Instead of buying a separate harness I just clipped it off the mirror. Others have purchased harnesses for off of eBay instead. Either way, I wanted to test and verify the wiring for myself since I didn't want to risk damage to my car. There are two wires that go into the OEM mirror that are left unconnected. I did not test those since the car doesn't use it and I was getting rid of the mirror.
Volt side harness wiring:
- grey w/ black stripe = ground
- red = switched ignition (+12v)
- green = reverse indicator (+12v)
- Build harness for new mirror
The mirror I had came with what I believe is a Hyundai compatible plug. I reversed engineer the wires using a external power supply. If you want your HomeLink to be always on or if you have an LT model youíll need to tap into the power a different way. There's great information in Teksavy's HomeLink Installation
Gentex 1124 mirror wiring:
- black = ground
- green = HomeLink power (+12v)
- pink-ish white = compass power (+12v)
- grey = auto-dim disable (+12v)
I wired both HomeLink power (green) and compass power (pink-ish white) to the switched ignition (red) and the auto-dim disable (grey) to the reverse indicator (green). Hereís my completed harness after I soldered the wires and insulated the wires with heat shrink tubing:
- Put it all back together
At this point youíre done. Slide the wedge back on, secure the mirror with the Torx Screw, connect the harness and put back the plastic covers. I also used some cloth tape and a foam tape to keep everything somewhat snug so nothing would move around. This is a shot of me testing to see where to secure it:
Thatís really all there is to it. Turn on your car and watch the magic of your work come to life. Donít forget to program your HomeLink and calibrate your compass afterwards. Many thanks to Teksavy and others in the first Volt 2016 documented HomeLink Installation and for the inspiration to go this route.