2010 F150 larriat battery warning with new alt and battery
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8th Gear
Joined: Aug 2007
Posts: 8
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2010 F150 larriat battery warning with new alt and battery
Hello, Just picked up the above truck from a family member
It been in storage last.couple years and has 111k miles
Just drove it 400 miles home over holiday weekend
Before driving back I replaced all rotors and brake pads
Also replaced front two calipers
On first test drive. The alt froze up and serpentine belt snapped.
I put in brand new battery, Alt and serpentine belt for the trip home
The batteriy warning was inconsistent for beginning of the trip but has stayed on solid the last 200 miles
I do see the dashboard gouges intermittently going dead then coming back on
Finally, I did confirm Alt is putting out 14V
Other then replace the new Alt, is there anything else I can check?
Tks
It been in storage last.couple years and has 111k miles
Just drove it 400 miles home over holiday weekend
Before driving back I replaced all rotors and brake pads
Also replaced front two calipers
On first test drive. The alt froze up and serpentine belt snapped.
I put in brand new battery, Alt and serpentine belt for the trip home
The batteriy warning was inconsistent for beginning of the trip but has stayed on solid the last 200 miles
I do see the dashboard gouges intermittently going dead then coming back on
Finally, I did confirm Alt is putting out 14V
Other then replace the new Alt, is there anything else I can check?
Tks
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
Check the battery cable going to the power distribution box, make sure the nut holding down the cable in the box is tight. Same for the cable nuts at the battery terminal. Any loose connections can cause an issue and the battery lamp to illuminate. If left loose too long it can be burned at the connections and overheat the cables and eventually cause a failed alternator, fried wiring, burned fuses.
Lead Driver
Joined: Nov 2020
Posts: 7,128
Likes: 1,945
From: Sportsman's Paradise
Uh, I think you mean BCM and no it does not have one. They didn't put the BCM in these trucks until 2011 ym.
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Logistics Pro
Joined: Jul 2003
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From: Lawton, Oklahoma
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Lead Driver
Joined: Nov 2020
Posts: 7,128
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From: Sportsman's Paradise
Ahh caught me with my acronyms down lol. That too. BMS, and I'm not sure about that either, I believe that's also an artifact of the system in 2011 that does have a BCM.
Ford changed all the electronics in 11 along with the whole new nengine line up.
Ford changed all the electronics in 11 along with the whole new nengine line up.
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8th Gear
Joined: Aug 2007
Posts: 8
Likes: 0
RE
Thank you for suggestions.
The problem seems to be getting worse:
Yesterday a couple more electrical issues
The 4wd light l, the parking brake light, and the backup camera in rear view mirror
I hate to spend money on an OE alternator on such an old truck when it may not fix the issue, but I may not have a choice.
The problem seems to be getting worse:
Yesterday a couple more electrical issues
The 4wd light l, the parking brake light, and the backup camera in rear view mirror
I hate to spend money on an OE alternator on such an old truck when it may not fix the issue, but I may not have a choice.
2nd Gear
Joined: Jun 2026
Posts: 2
Likes: 0
Thank you for suggestions.
The problem seems to be getting worse:
Yesterday a couple more electrical issues
The 4wd light l, the parking brake light, and the backup camera in rear view mirror
I hate to spend money on an OE alternator on such an old truck when it may not fix the issue, but I may not have a choice.
The problem seems to be getting worse:
Yesterday a couple more electrical issues
The 4wd light l, the parking brake light, and the backup camera in rear view mirror
I hate to spend money on an OE alternator on such an old truck when it may not fix the issue, but I may not have a choice.
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striker_wvu
1987 - 1996 F150 & Larger F-Series Trucks
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Apr 9, 2007 11:42 AM