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Constant-on 12V source

ESG406

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Ed
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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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ESG406

ESG406

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Ed
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21F150 Hyb, 15ExpEL 2 '06 Esc Hyb 99&01elect Rngrs
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Retired
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

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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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