BMS reset question
Thread Starter
|
More Turbo
Joined: Jul 2005
Posts: 591
Likes: 37
From: Groton, MA
BMS reset question
I'm going to replace the battery in my 2015 and the reset procedure calls for flashing highs and pressing the brake with the power on but not started resulting in the battery icon flashing. My problem is that on my truck with the power on not started I don't get a battery icon. I've searched on the internet and found others who have 2015 F150s with the same issue. Apparently it's normal for my year/model and a firmware update in 2017 added the icon.
My question is will the reset procedure still work even though there is no icon? Is there a way to verify it was reset? I don't have Forscan because all my computers and phones are Apple.
My question is will the reset procedure still work even though there is no icon? Is there a way to verify it was reset? I don't have Forscan because all my computers and phones are Apple.
Fleet Mechanic
Joined: Jan 2020
Posts: 1,369
Likes: 417
My guess it will not reset it. I would make sure I installed a fully charged battery, let it rest overnight so that it sees the state of charge. I actually have read documentation from a Ford battery engineer that states the BLM will reset itself within a few weeks. I would not lose sleep over it personally.
Lead Driver
Joined: Jun 2005
Posts: 8,471
Likes: 727
From: Calgary Canada
the "state of charge" resets automatically. But people say there's a "battery age" thing that doesn't reset without the procedure. I don't know how much that matters. I'd think SOC is by far more important.
Moderator
Joined: May 2005
Posts: 8,229
Likes: 1,247
From: San Antonio, TX
When I replaced my battery the first time, I didn't reset the BLM. It lasted 6 years, which is a record for me. The battery I have now, I reset it. In my experience, it doesn't matter one way or the other.
Fleet Mechanic
Joined: Jan 2020
Posts: 1,369
Likes: 417
Should anyone care for the note about resetting , see attached link, go to post #27. I have the dongle and will reset mine when I change the battery soon, but I'm also upgrading from a H6 to H7 and want to update the file.
https://www.f150forum.com/f118/new-b...460039/index3/
https://www.f150forum.com/f118/new-b...460039/index3/
Mountain Pass
Joined: Jun 2019
Posts: 127
Likes: 60
Trending Topics
Fleet Mechanic
Joined: Jan 2020
Posts: 1,369
Likes: 417
Yes you can, but you need to update the file in the computer with Forscan. I do not know what the consequences would be if you do not.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
More Turbo
Joined: Jul 2005
Posts: 591
Likes: 37
From: Groton, MA
Update: I changed the battery this afternoon and, even though the battery icon isn't displayed with the power on and no start, it did flash 3 times after I performed the reset procedure.
BTW the battery I replaced was the original battery from when I picked up the truck on 7/1/2015. It still load tested about 90%, but it was starting to struggle on cold mornings.
BTW the battery I replaced was the original battery from when I picked up the truck on 7/1/2015. It still load tested about 90%, but it was starting to struggle on cold mornings.
Thread
Thread Starter
Forum
Replies
Last Post