Replacing Battery 2016 F150
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
You have several options to reset the SOC of the BMS.
The SOC resets every 8 hours with the truck locked and no activity.
The SOC and the BMS (including days in use) can be reset with forscan.
The BMS can be turned off completely in forscan.
The SOC resets every 8 hours with the truck locked and no activity.
The SOC and the BMS (including days in use) can be reset with forscan.
The BMS can be turned off completely in forscan.
Lead Driver
Joined: Jul 2004
Posts: 6,951
Likes: 512
From: Foothills, CA
And then along comes this thread. Assuming what your answer will be - I should just go yank the CTEK off the F150 and lock the doors and leave it...
Thanks for all your help...
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
The charger will inhibit the BMS from learning the SOC. On the other hand the CTEK will also extend battery life. You will always be chasing the BMS if you use a float charger or any charger.
Lead Driver
Joined: Jul 2004
Posts: 6,951
Likes: 512
From: Foothills, CA
I need to look into the other option that you have chosen to do: turn BMS off - the bonus is Auto Start/Stop pain-in-the-tail would go away...
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
instead of connecting the charger’s ground clamp to the negative battery cable clamp at the battery negative post, connect it to the other end of the negative battery cable, where it connects to the inner fender. That way the BMS will see the current going going through the battery from the battery charger.
Lead Driver
Joined: Dec 2016
Posts: 5,650
Likes: 243
From: GA
Same as you, I haven’t had any problems.
Tuned
Joined: Jan 2015
Posts: 472
Likes: 153
From: Southeast Wisconsin
This has been a most informative thread. I am going to opt for keeping my battery tender hooked up as the truck just sits for weeks at a time now.
So this should be fine as long as I disable the BMS in ForScan and connect the negative terminal of the charger to a body ground?
Can anybody direct us to the correct module in ForScan and tell me what characters to change?
P.S. I also read on another forum that simply disconnecting the Hall sensor on the negative battery cable will disable the BMS with no further mods needed. Has anyone here tried doing that?
So this should be fine as long as I disable the BMS in ForScan and connect the negative terminal of the charger to a body ground?
Can anybody direct us to the correct module in ForScan and tell me what characters to change?
P.S. I also read on another forum that simply disconnecting the Hall sensor on the negative battery cable will disable the BMS with no further mods needed. Has anyone here tried doing that?
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Pulling the hall effect sensor worked on previous generation trucks. If you do that now it will set a code and will not charge. Does your truck have auto stop start?
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Tuned
Joined: Jan 2015
Posts: 472
Likes: 153
From: Southeast Wisconsin
I also figured out that the BMS is in the BCM module, so I can do the new battery reset there I think.
Still not sure how to disable the system entirely as I don't know what characters to change. Or will this be self-explanatory once in the BCM module?
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
You can reset BMS in forscan under service functions. To disable BMS look in the BCM plain English first. BCM 726-48-02 x0xx xxxx xxxx
https://docs.google.com/spreadsheets...5730/htmlview#
https://docs.google.com/spreadsheets...5730/htmlview#
Tuned
Joined: Jan 2015
Posts: 472
Likes: 153
From: Southeast Wisconsin
You can reset BMS in forscan under service functions. To disable BMS look in the BCM plain English first. BCM 726-48-02 x0xx xxxx xxxx
https://docs.google.com/spreadsheets...5730/htmlview#
https://docs.google.com/spreadsheets...5730/htmlview#
Thanks again!
More Turbo
Joined: Aug 2007
Posts: 681
Likes: 11
The fact that battery replacement is even a thread and is as confusing as all get-out shows me how preposterous the car industry has become. Apparently the K.I.S.S. principle has completely escaped the manufacturers if it was ever even introduced.
Anyway, this might be an ignorant question but why can't you hook up another battery via jumper cables before removing the old battery for replacement, wouldn't that keep this ridiculous computer system juiced with no need for this BLM baloney (which cars seemed to run fine for practically a century before its introduction)
Sorry for the rants but autos these days are just riddled with unnecessary tech and features these IMO.
Anyway, this might be an ignorant question but why can't you hook up another battery via jumper cables before removing the old battery for replacement, wouldn't that keep this ridiculous computer system juiced with no need for this BLM baloney (which cars seemed to run fine for practically a century before its introduction)
Sorry for the rants but autos these days are just riddled with unnecessary tech and features these IMO.
Lead Driver
Joined: Jul 2004
Posts: 5,946
Likes: 62
From: in the woods of MA
Anyway, this might be an ignorant question but why can't you hook up another battery via jumper cables before removing the old battery for replacement, wouldn't that keep this ridiculous computer system juiced with no need for this BLM baloney (which cars seemed to run fine for practically a century before its introduction)
Senior User
Joined: Feb 2004
Posts: 119
Likes: 0
From: Vancouver area
Good grief, the simple answer to this is, buy a battery and install it yourself! Took me all of 5 minutes in my 2016 F150 XLT Sport 4X4! The switch, from taking the last cable off, to having the other in it's place and hooked up was about 30 seconds, and I didn't loose any radio stations, or any other issues....as if the truck had no idea it was changed! I did buy mine at a Ford dealer (another Motorcraft battery, with more crank-amps, but similar sizing) and it fit in perfectly!
When I got home...just to be on the safe side, I put my battery charger on it, to bring it right up to 100%, which only took a few hours while parked, albeit I'm unsure how necessary that is.
Anyway, a simple job for those wanting to do it themselves!
When I got home...just to be on the safe side, I put my battery charger on it, to bring it right up to 100%, which only took a few hours while parked, albeit I'm unsure how necessary that is.
Anyway, a simple job for those wanting to do it themselves!
Tuned
Joined: Jan 2015
Posts: 472
Likes: 153
From: Southeast Wisconsin
Good grief, the simple answer to this is, buy a battery and install it yourself! Took me all of 5 minutes in my 2016 F150 XLT Sport 4X4! The switch, from taking the last cable off, to having the other in it's place and hooked up was about 30 seconds, and I didn't loose any radio stations, or any other issues....as if the truck had no idea it was changed! I did buy mine at a Ford dealer (another Motorcraft battery, with more crank-amps, but similar sizing) and it fit in perfectly!
When I got home...just to be on the safe side, I put my battery charger on it, to bring it right up to 100%, which only took a few hours while parked, albeit I'm unsure how necessary that is.
Anyway, a simple job for those wanting to do it themselves!
When I got home...just to be on the safe side, I put my battery charger on it, to bring it right up to 100%, which only took a few hours while parked, albeit I'm unsure how necessary that is.
Anyway, a simple job for those wanting to do it themselves!