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Help with 2011 F-150 Alternator problems

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Old 05-30-2013, 06:31 PM
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Default Help with 2011 F-150 Alternator problems

Hey,

Ok so, I'm having some issue with my 2011 F-150 truck, specifically the alternator. I've had the truck 2 yrs now with no problems. Two weeks ago I started the truck and after 1 min the battery light came on. Went under the hood, played with some wires to no avail. Needless to say it happens every time I start the truck.

I called my local Ford dealership to ask them what the problem could be. (I could bring the truck in but warranty expired 5000 km ago and it'll cost over $100 just to test it, am on a budget so that is not an option at this moment. I don't know anybody who has one either).

So instead I got a replacement alternator and installed that today hoping that it would have fixed the problem. It didn't. Battery was charging at 13.40 (ish) and now it's at 15 (before I replaced alt. and after). Battery light is still on. I checked the wiring for battery connection, nothing. Cleaned connection at starter, nothing. Checked and cleaned connection at alternator, still nothing. Thinking maybe wiring harness? But again, that's a $1700 bill not including labor. My Ford is a 3.7 v6.

Wondering if anybody else has had this problem with their Ford. Any help/feedback would be greatly appreciated! Am at my wits end..
Old 06-14-2013, 08:58 AM
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Seriously..? No one has any kind of feedback about this? = ( Unfortunately it's still happening. ANY kind of feedback would be great! At least something to point me in the right direction...
Old 06-14-2013, 09:23 AM
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Should of paid the $100 bucks
Old 06-14-2013, 09:31 AM
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Moved your thread to the 09 section, with more traffic.

Is the battery loosing charge anywhere? Are the cables clean? Have you checked fuses?

I don't know much about these new f150's, I'm sure someone will jump in now and help yeah

Originally Posted by Ironcity66
Should of paid the $100 bucks
This forum is about saving money, Not shelling out cash.
Old 06-14-2013, 09:33 AM
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If you replaced the alternator you should have replaced the battery as well, most likely you battery was/is your only problem and requires replacing.
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Old 06-14-2013, 09:34 AM
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go through the fuses, check all the cables and make sure theyre tight
Old 06-14-2013, 09:36 AM
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Have your battery tested. It is either the battery or alternator. You should be able to have them both tested for free at any autozone or oreilly stores.
Old 06-14-2013, 11:18 AM
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If you didn't disconnect the battery B+ wire when you checked/cleaned it do so to reset the PCM. Some DTC's will latch and will not reset unless manually done. If it didn't reset then we won't be able to help you mcuh unless you give us the DTC code which is being pulled. You could check the Asense (alternator sense) fuse in the PDB. Don't know what fuse number that is for 2011.

Edit - I just looked for you, check fuse 45, Alternator Sense, it is a 10A in the PDB (power distrubution box under the hood)

Last edited by stormsearch; 06-14-2013 at 11:22 AM.
Old 06-14-2013, 03:59 PM
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Originally Posted by Tanner2
Have your battery tested. It is either the battery or alternator. You should be able to have them both tested for free at any autozone or oreilly stores.
^^^This. It may just be a dead cell in the battery.
Old 06-14-2013, 07:28 PM
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Measuring the voltage across the terminals won't tell you whether or not a battery is good or bad. It needs to be load tested. I have one of these.

http://compare.ebay.com/like/170978393245?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar
It will also test your charging system.


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