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re: Mechanics of the OT: 2010 F-150 issue
Posted on 11/24/25 at 7:43 pm to King of New Orleans
Posted on 11/24/25 at 7:43 pm to King of New Orleans
No it won't charge the battery when not running.
Go by a parts store and have the battery load tested. Check the battery terminals for corrosion too
Go by a parts store and have the battery load tested. Check the battery terminals for corrosion too
1
Posted on 11/24/25 at 7:50 pm to greasemonkey
The charging signal and beeping is now happening while driving as opposed to when only stopped prior to replacing the alternator.
I just drove 2.5 miles and it beeped on 3 different occasions. It’s almost worse since changing the alternator. But it doesn’t do it while stopped now.
I just drove 2.5 miles and it beeped on 3 different occasions. It’s almost worse since changing the alternator. But it doesn’t do it while stopped now.
This post was edited on 11/24/25 at 7:52 pm
Posted on 11/24/25 at 7:57 pm to King of New Orleans
quote:
Can the battery charge while the truck is turned off?
Wow. All I can say. Wow.
Posted on 11/24/25 at 7:59 pm to UptownJoeBrown
Go back to my post and read that. I spent my time researching this you know?
I swear I just waste my time giving advice on TD. This thread might cure me on doing it anymore.
I swear I just waste my time giving advice on TD. This thread might cure me on doing it anymore.
This post was edited on 11/24/25 at 8:01 pm
Posted on 11/24/25 at 8:27 pm to King of New Orleans
It's a ford 
Posted on 11/24/25 at 8:36 pm to Mid Iowa Tiger
Or crank the truck up and lift the positive cable off the battery. If it shuts off it’s the alternator.
Posted on 11/24/25 at 8:39 pm to King of New Orleans
Has to be running to charge. How old is the battery ? 2.5 miles isn’t a long ride to charge a weak battery. Have the battery tested and run it more and see.
This post was edited on 11/24/25 at 8:43 pm
Posted on 11/24/25 at 8:50 pm to King of New Orleans
I have an XLT and had to change out my alternator about a year ago. At first it sounded like a power steering issue. I eventually was able to smell it burning up
Posted on 11/24/25 at 8:54 pm to jmarto1
All of our 2010 f150 alternators are going bad at the same time. Just changed mine last year as well and same symptoms.
About to hit 250k on her!
About to hit 250k on her!
Posted on 11/24/25 at 8:55 pm to Merica
I just hit 150k but I dont put this thing through hell. After 15 years it was to be expected
Posted on 11/24/25 at 8:57 pm to UptownJoeBrown
quote:
swear I just waste my time giving advice on TD. This thread might cure me on doing it anymore.
Please, I pray this is the case.
Posted on 11/24/25 at 11:08 pm to King of New Orleans
quote:Found your problem, tried burning it?
my F-150
Posted on 11/24/25 at 11:25 pm to UptownJoeBrown
You can't say wow when all your advice has been pure shite..lol
Posted on 11/24/25 at 11:42 pm to King of New Orleans
Could be a tensioner. I would use a mechanics stethascope to isolate noise
Posted on 11/25/25 at 12:49 am to King of New Orleans
Like someone said, the cooling fan could have issues unrelated to your battery like the fan motor bearing or fan clutch going out. Listen closely to identify the source of the noise. I don't know if a bad fan could cause the voltage error but it's worth looking into. Those fans typically kick on when you're sitting still because you don't have the air flow that you'd have when traveling.
Posted on 11/25/25 at 5:27 pm to manwich
So I took the truck back in today and had them look at the alternator. The message came on while they had it but they drove it and it didn’t come back on (shocker). It came on about 5 times later today on a 10-15 min drive.
I found out today I was low on Freon which was causing the fan to work overtime.
However, after topping it off, the fan is still blowing harder than it should.
Should I replace the fan? Would that be a reason why the charging message is coming on?
Should I be worried if the alternator does charge the battery when running and the alternator is new?
I found out today I was low on Freon which was causing the fan to work overtime.
However, after topping it off, the fan is still blowing harder than it should.
Should I replace the fan? Would that be a reason why the charging message is coming on?
Should I be worried if the alternator does charge the battery when running and the alternator is new?
Posted on 11/25/25 at 5:36 pm to King of New Orleans
So you haven’t solved the 3 beep battery notice yet right?
Posted on 11/25/25 at 5:36 pm to King of New Orleans
Somethings not adding up here.
Which fan is running ‘hard’?
Have you had the battery tested yet?
Does the F-150 have a star connector for the main controls?
Which fan is running ‘hard’?
Have you had the battery tested yet?
Does the F-150 have a star connector for the main controls?
Posted on 11/25/25 at 5:40 pm to King of New Orleans
quote:
Should I be worried if the alternator does charge the battery when running and the alternator is new?
No, that is one of the alternator’s jobs.
Need to test that battery
Posted on 11/25/25 at 5:42 pm to ValZacs
200k on my f150…wait until the plastic piece that manages recirculating brakes off inside the ac blower fan. You will know that rattle when it happens.
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