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Screens went black!

4349 Views 31 Replies 9 Participants Last post by  FM_Jack
I had my windows tinted in my lightning today, front 2 to match the back and the front glass with 70% ceramic tint. Apparently sometime during or after the tint was finished the instrument cluster screen and the 15 inch screen went black. The truck was still able to be drove to the dealership which is what the tinting company did. This was at the end of the day so nothing has been discovered yet but I have some ideas as to what is going on. Anyone have this issue or something like this happen in the Mach E? The truck was left in accessory mode for the duration of the tinting application. I would say 2-3 hours at least.
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when all else fails, reboot...

12v battery reboot
So does that mean unplug the 12 volt battery and replace with a new one?
Is there an online Lightning owners manual posted anywhere, I would like to access it on my computer rather than my Ford pass app.
One would assume that if the truck auto shuts down after 15-30 minutes without driver intervention to stop it continuously running, that this same feature would apply to the accessory only power for the sole purpose of preventing draining the 12 V battery. I guess it is not or the tint company had to stop the shutdown countdown every 15 minutes to keep it on.
Also I just read in the lightning owners manual that the high voltage battery charges the low voltage battery only when the truck is off. Is this different than with the mustang Mach E? Can anyone confirm this?
One would assume the truck would be keeping the low voltage battery charged when it’s running but I guess it does this when it’s off or charging.
The first thing to do When the screens freeze or blank out is to reboot the Sync system.

On the steering wheel controls ... simultaneously hold the volume-down and also the "Next Track" button (just to the right of the volume control ... the arrow pointing right). Hold them until you see the center screen go black. It will take several seconds ... eventually the Sync4 system will reboot.
I learned that technique from the lightning manual too yesterday, unfortunately I didn’t get to see my truck before the service department got it and they were gone for the day when I got to the dealership. They had the 12 volt battery off so the truck wouldn’t power on or do anything. I guess they were trying to get it to reset. I’m not sure if they will charge the 12 volt battery before hooking it back up today. Based on what I’ve read, if the 12 volt battery is the dead, just leaving the truck off for several hours with it still connected would have probably allowed the high voltage battery to charge it back up and everything would have went back to normal.
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Also Coral,
Can you say whether the 12 volt battery charged while the truck is running? Based on the owners manual it is worded as if it does not but instead charges when the truck is off or plugged in charging. I’m not sure how the 12 V wouldn’t go dead on a long drive if the truck wasn’t charging it during that time unless the power to the accessories is coming from the high voltage battery only while driving.
It is my opinion that EVs should trigger the DC/DC converter when plugged in, to also keep the 12v battery topped off. MOST DO NOT. I travel, and both the GM EV and my Teslas will suffer 12v death if left long enough without being "awakened" as per above.
I believe I read in the owners manual that the lightning charges the 12 volt battery when plugged in as that was an alternative recommendation in the manual for dealing with 12 volt battery issues.

Turns out my trucks issue was an “Audio Control Module”. This was likely damaged by water when they tinted the front window. Service department said when they pulled this module out everything started working again. Thankfully this component is in stock, ready to ship and they have put a major rush on it to get it in as soon as possible. Thanks everyone for your input! As much as I would have rather not had an issue, I have learned a lot about my truck and the workings of the 12 V system through this process. My dealership has been awesome.
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Back in business. Picked the truck up at 1 today. Found out exactly what happened. The “phone mat” (that is what the dealership called it) between the dash speaker and the back of the 15” screen has little holes in it apparently and the guy tinting the front windshield didn’t realize this so he didn’t put anything over it and a little bit of water got down in there and messed up the audio control module. Just thought that was good info to know for anyone thinking of tinting the front windshield. The tint looks awesome btw. 70% ceramic on the front is just right in my opinion. Hard to tell but reduces heat and UV by a lot.
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Great! Since it was damaged by the tint company, who paid for the repairs?
I’m not sure. I know I don’t owe the dealership anything and I’m not sure what I owe on the tint job yet. The dealership and the tint company have a really close relationship so it wouldn’t surprise me if they don’t let it slide
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You guys jinxed me. Happened to me this morning as I went to work.

I did the reset and it pulled right up as I was driving.
Any problems since the reset?
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