Constant-on 12V source

[ESG406]

I have had zero success in finding a constant-on 12v source in my 2021 F-150 Powerboost cab. I want a source that does not turn off, ever.
If I have to wire directly to the 12v battery, what is least intrusive path to bring the 12v wire into the cab near the bcm fuse box? When I looked at the bcm fuse box, I did not see a constant-on 12v source.

Anyone have any thoughts or suggestions?
Ed

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[UGADawg96]

maybe here:

https://www.f150gen14.com/forum/thr...ed-12v-for-dash-accessories.10015/post-211021

or here:

https://www.f150gen14.com/forum/thr...hot-always-hot-hot-in-start-or-run-etc.16305/

 

[ESG406]

Thanks for reply. Have tried all, have not any that battery saver doesn't power down. Working on passing wire directly from battery to cabin.Before I do, wanted to make sure this was only way.

 

[bbene]

I pull 12v off of the battery under the passenger back seat. So far for my use case it has always had power.

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