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Old 06-23-2011, 05:18 PM   #1 (permalink)
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I have a 2011 Elantra GLS and thought the auto dimming mirror with homelink would be a nice addition. I got the part, and tried to find somewhere reasonable to install it for cheap. My husband didn't want to mess with the headliner, so I found an independent guy who installed it for less than all the local dealers.

I just picked the car back up after the install, and I don't think the homelink mirror was connected. I can see the green sensor comes on/off for auto dim, and the compass works, but when I push on any of the 3 buttons for homelink....nothing.

Anyone have any suggestions for how to check to see if somehow something wasn't connected?? I really don't want to take it back to the guy who installed it, because obviously he missed something and chances are pretty good he doesn't know how to fix it I hate having to go to my local dealer at this point (not the nicest service people, unfortunately!), but I'd really like the buttons to work!

Thanks!
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Old 06-23-2011, 06:21 PM   #2 (permalink)
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Not to be a smarty pants, but are those three buttons programmed to work with your garage door opener? If not you have to program it before it will work. If you programmed it, I have the installation instructions and might beable to help.
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Old 06-23-2011, 06:23 PM   #3 (permalink)
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I'd be delighted to actually try to program the buttons...but there is no power to the buttons. That's the whole problem

When I push any of the buttons...nothing. According to the little handy booklet for programming, there's supposed to at least be a blinking/flashing red sensor light. I don't have any response when pushing the button, so programming isn't even something I can get to happen yet.
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Old 06-23-2011, 06:26 PM   #4 (permalink)
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Ok, I will get the installation instructions from my glovebox and see what I can find.
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Old 06-23-2011, 06:40 PM   #5 (permalink)
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Sounds like maybe he didnt wire it correctly. The black wire on the mirror harness needs to connected to the red (or purple) wire at Pin #8 of the 14 pin connector at the top left of the junction block just below the fuse panel. If is is connected to the correct wire, then it might be a faulty t-tap used to splice the wires together.
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Old 06-23-2011, 06:53 PM   #6 (permalink)
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There are 3 wires for the Homelink mirror. A black ground wire, a black power wire (battery constant 12 volts), and a black and white wire (ignition switched 12 volts).


If you look at the Homelink wire harness. The black wire connected to pin #1 of the harness is the ground wire. The black wire connected to pin #3 is the power wire (battery constant 12 volt). The black and white wire connected to pin #4 of the harness is the power wire (ignition switched 12 volt).

Because the Homelink buttons for the garage door opener features are suppose to work whether the ignition is on or not, I believe it is powered by the black power wire at pin #3.
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Old 06-23-2011, 06:54 PM   #7 (permalink)
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Thanks! It helps to know what to look for!
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Old 06-23-2011, 06:59 PM   #8 (permalink)
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The auto dim and the compass should be features that are powered by the black and white wire, because they should only function when the ignition is switched on.

The fact that the auto dim and compass seem to work, then I believe the black and white wire and the black ground wire are connected properly, and that the problem is with the black power wire (battery constant 12 volt)
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Old 06-23-2011, 10:37 PM   #9 (permalink)
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My homelink mirror was installed by the dealer . It seems that the garage door buttons only work with the ignition on. Also, are the buttons suppose to be backlit? Hard to see at night when trying to find the right buttons.
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Old 06-24-2011, 04:26 PM   #10 (permalink)
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The garage door buttons should work with or without the ignition on. If it only works with the ignition on, it is wire wrong. Also there is no back light on the buttons.
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