Mirror Tap issues

[AstleyJ]

Hey all,

So a little over two weeks ago I got into my car to find that my MMI system was non responsive. The screen didn't flip up, and all of the buttons were not illuminated or responding to any input. I assumed this was a blown fuse for some reason and thought it would be no big deal. Turns out the dealer disagreed and thought otherwise.

I was told that the mirrortap that I had installed for my V1 was the reason that the fuse blew. However, before making this determination, there was a TSB out about the 5F control module possibly being the issue. So they replaced the entire control module. Unfortunately, the fuse continued to pop after they had done this. They located the mirrortap and removed it which in turn stopped the fuse from popping again. They covered the control module under warranty, but asked me to pay a couple hours labor as the whole project took them two days to sort out. Not terrible but I wasn't happy having to pay for anything related to this at all.

So, anyone had their mirrortap do something similar? Any thoughts on why this would be happening? I am tempted to plug it back in and see if it happens again... But everything has been fine for a few days now since it had been pulled out so I feel like it may not be worth messing with. Might just have to go the long way around and run the power down the A piller to the fuse box and install a dedicated fuse for the V1.

[InvigR8]

Do you have HomeLink? I thought that was a different fuse from the MMI.

[bobamoo]

I had a stereo shop install the wire down the A pillar. Not sure where they connected it but have not had any issues.

[JoeGie]

I would say just run it down to the fuse box, it's probably a 15-20min install, you just need the hardwire kit and an add-a-fuse.

[Clipse3GT]

I run the MirrorTap on mine no issues. I checked everything with a multimeter. Might be a bad mirrortap though...

[CASoxFan]

I had that exact same thing happen. Was being careless during install trying to re-use an old cord. Got the exact same outcome. Was a blown fuse in the fuse box in the trunk. Replaced fuse, got new cord and installed without issue. There is a thread on a write-up for which wires to use, my guess is you didn't have it installed correctly.

[AstleyJ]

I had that exact same thing happen. Was being careless during install trying to re-use an old cord. Got the exact same outcome. Was a blown fuse in the fuse box in the trunk. Replaced fuse, got new cord and installed without issue. There is a thread on a write-up for which wires to use, my guess is you didn't have it installed correctly.

I ordered the correct cord, used a multimeter, and followed that write up that you are referring to. My only thought is that it was a bad mirrortap and that's what blew it.

[yas]

If you have a set of trim tools, running it down the A pillar to the box is a 3 minute ordeal.


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[dafried]

If you have a set of trim tools, running it down the A pillar to the box is a 3 minute ordeal.


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I have a 2014 A7 - what fuse did you tap into when you ran it down the A pillar? I bought mirrortap for my V1 but I have not yet installed it.

I appreciate any suggestions - thanks,