It seems like it's mainly 2010-2011 models. The newer models have a revised rear window.

 

I tried this today (disconnect wire from grid) on my 2012 FX4 w/Luxury pkg Supercrew,(built 11/08/11) I then pressed the rear defrost button (that activates heated side mirrors as well) with it disconnected at rear window to determine if they still worked and nothing , no amber light on switch, pressed the (rec) recirculate button also and nothing no amber light on switch . Slipped the metal connecter back onto the rear defrost grid and all works well . I had my entire pwr sliding defrost rear window replaced in fall 2012 due to delamination of the black paint around the frame, so by virtue I had a newer window to begin with being a 2012 opposed to 2010, and then a newer yet window that I have now from 9/2012 when it was ordered from Ford and put in. I just turned it off within the remote start and will keep an eye on it and use it sparingly I guess.

 

[QUOTE=FordService;3196902]Hi Stirling10Fx4,

Since you live in Canada, your questions will be best answered by my colleague on the forum, Bianca. She assists all of our Canadian customers and will be happy to help you as well. Here's a link to her profile here: https://www.f150forum.com/members/fordserviceca-150023/

Crystal[/QUOTE

Crystal,

Thank you very much for the information and I will be sure to contact Bianca in regards to this matter.

Best regards,

Stirling10Fx4

 

The thing I enjoy most about this forum is the people who give enough of a **** to take the time to offer their assistance to one another. No matter how basic or in depth the question may be, the vast majority of us will take the time to share our knowledge or experience to help a fellow enthusiast.
In a case like this, it is great to see that our information sharing and unity to have our issues resolved by the mighty blue oval has raised enough concern to warrant at least discussion with the warranty department of Ford Motor Company as these concerns were initially disregarded.
For all the hypocrites that lurk these pages and judge the submissions and legitimate concerns of enthusiasts, I do hope you will one day learn to appreciate the efforts of others and feel a greater need to contribute rather than scrutinize.

 

I think you misunderstand my intentions. My only suggestion is to put this all into perspective, that's all. I am very interested in the root cause of this issue, and earlier in the thread it was suggested that it was a flaw in the glass. Nobody has offered anything contradicting this other than a possible correlation with some trucks that wee set alight by faulty wiring, and I'm still trying to figure out if they are related. That's why I asked if anyone has had a repeat failure, and as of right now I haven't heard of one.

I stand by my assertion that it's ridiculous to unplug your defroster out of fear for this issue. With over a million trucks of this generation on the road the failure numbers don't seem great enough to get worked up over. I'd be frustrated if it happened to me, but the solution is to fix the issue not disable the defroster. And the lack of repeat failures suggests to me that the issue was fixed with the replacement glass. I'm still following this thread to learn more about the issue. To call me a hypocrite seems ridiculous to me, and it seems ironic that I'm the one being called judgmental.

 

Hi everyone,

I'm collecting VINs of everyone who has experienced their glass cracking/bursting after using the rear defrost. Please send me a quick PM with your VIN (doesn't matter if you live in Canada or US) so I can get this information into the hands of the right folks.

Thanks!

Crystal

 

I have a 2012 FX4.
My window exploded two days ago.
Denied warranty. Imagine that.

 

****. I thought the 12s were safe......what is that fuse again?

 

Same here. My little one rides back there

 

Just pop fuse #32 out of the junction box in the engine bay. It powers up the rear defrost grid only. The heated mirrors still work because they are on a different fuse.

Keep in mind this info is for my 2010 truck. I'm not sure if the newer ones have different fuse numbers for it. Just check your manual. The fuse is labeled as "Heated backlite" and is 40A.