Back window defroster stopped working

[Jetskier222]

I added heated mirrors to my 2020 Sport. Everything worked fine for about a year and a half, but now my heated mirrors are working, but my back window stopped working. Does anyone have any idea what could be wrong, or where to start trying to diagnose the problem?

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[DylanM]

Check fuse 81 first. If the fuse is good, see if you're getting power to the window grid at the dark blue & white wire, and that you have a good ground at the black wire. If your power and ground are both good, look for a break in the heating grid.

 

[Jetskier222]

The fuse is good, I have power on the blue/white, continuity on the ground to the back. I don't have continuity between the blue/white and black coming from the back window. I do between the grid on the windows though. What's the orange/gray wire for? Also, should this black connector be loose at all? One side is, it turns, but doesn't come off. The other side isn't, but it was off once a while ago, and i had to use some adhesive to put it back on. My defroster worked since then though.

 

[Jetskier222]

Does anyone know what the orange wire is/does?

 

[Jetskier222]

I got it working again. I had glued the button back on after it fell off with conductive adhesive. It worked for a while then quit. I bought a permatex repair kit at O'reilly that has a copper paint and stencil to repair the grid lines with. I used the paint to paint from the button base down onto the copper material on the window that the button is supposed to be adhered to and make the connection. I had continuity before it was all the way dry. 24 hours later, I plugged in the wire and now it works.

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