Hello everyone! Im starting this thread hoping it will be seen. I've replied in another that was having similar issues. But no one seems to be on that one anymore.

*issue*
My 2010 F150 XLT is having a weird draw happening. It's fine for over a week during the summer (anything warmer than -5c/23f) anything colder than -5c/23f and it's got about a day and a half before its dead. I know it's not the battery as I've put 2 brand new ones in in the last 3 months. First one I got warrantied as I called the parts store and said I installed it and it's dead within a day or two and they said they would just exchange mine out. So battery is good.

*diagnosing*
I removed my Neg terminal and put a 5amp light bulb in line. (It lights up with a draw) I then unplugged my fuses in th eengine bay area one by one to see if the light would flicker and or turn off. The light didn't turn off or get dimmer at all. I ran the light into the passenger side fuse panel area. I went through and unplugged one by one and when I removed fuse #5 - 10 amp "Keypad Illumination, Brake Shift Interlock (BSI), SJB Microprocessor Power" my light turned off (good thing!) Unfortunately if I leave that unplugged I can't get the vehicle into gear (obvious I know).

*conclusion*
With all this being said, where should i go from here? I did have a relay/ add-a-fuse set up (essentially took power from an aux power fuse, to trigger relay and connect fuse #5 to power) but im looking for a more permanent solution and a less "greasy" fix.

Any tips or advice would be greatly appreciated! Thank you!

 

Do you have a Battery Management System? My electrical problems simply went away when I disconnected it.

https://www.ford-trucks.com/forums/1...-system-2.html

 

Hey sorry, work was hectic the last week or so.
I will give this a shot. I'm not really understanding what exactly it's referring to. But I'll take a gander at my truck when I'm able to get into the shop again. From what I read on that, once I unplug it I'll have to manually turn everything off in the cab? And unplug everything?

My wife mainly drives the truck. So I'd prefer to not have to teach her how to turn everything off. She's definitely a turn the key off, pull key out, lock and walk away kind of lady.

 

That's all I do- turn off key, remove key, exit truck, lock doors. I never turn off anything.

 

.. duplicate post, sorry.