Keep 12V powered after ignition is off 2024

[bhellickson172]

Has anyone discovered a method to keep the 12v power pot active with the key and accessories off? Cannot find anything powered in my 24 Platinum once the ignition is off. Would rather not rewire - is there a way with FORSCAN or a scanner or Fords programming tools to keep the 12v awake? Before investing in the tool or having an experiment go ary I would rather have a direction!

Thanks

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[Buyer2021]

Be careful what you wish for, lest you suffer unintended consequences.

Unlike older trucks, Gen 14 F150's require periods of "sleep mode" to keep the battery SOC data accurate, which bears on charging system behavior when running. Loads present after key-off can prevent that from happening. Clip from the Workshop Manual Section on Charging System Operation, just FYI:

".... During rest periods (key off with no electrical loads) when the vehicle enters sleep mode, the battery voltage is sampled to calibrate the state of charge. The sensor automatically executes this calibration anytime the vehicle enters sleep mode and when the total vehicle current draw is below 400mA. It takes 4 to 6 hours in the sleep mode to calibrate the battery state of charge to high accuracy. If the system draw does not allow the battery state of charge calibration over the previous 7 to 10 days the state of charge quality factor changes to flag this and some battery monitoring system functions, which rely on the accuracy of the battery state of charge, may be temporarily turned off until a calibration takes place.​

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NOTE: Any devices left attached to the power socket that draw in excess of 200mA (or less depending on other battery loads), prevents a battery monitoring sensor from calibrating the battery state of charge."​

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Perhaps worth further noting .... battery charge issues are among the most common complaints posted on this forum.

 

[bhellickson172]

WOW - thank you for that information. I had no idea. Not simple anymore is it. I know on some previous models you could set a delay in FORSCAN but I guess that option is gone also.

 

[JTL89]

Just curious, what are you trying to accomplish? Trying to provide constant power to an accessory when you're away I'm assuming?

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