Notices
2021+ F150 Discuss the 2021 Ford F150
Sponsored by:
Sponsored by: Real Truck

Charging issues

Thread Tools
 
Search this Thread
 
Old Mar 25, 2025 | 04:51 PM
  #1  
540milotalon's Avatar
540milotalon
Thread Starter
|
Laughing Gas
15 Year Member
Joined: Sep 2007
Posts: 871
Likes: 5
From: Near Shenandoah Valley
Charging issues

The truck is daughter #1's truck, 2021 F150, 2.7 turbo
not charging and I "think" it's an alternator.
Knowing I am extremely swamped she drove it to a shop, after a couple days of no contact she calls them.
They tell her they "think it's the alternator." They tell her they cannot get a "map of the wiring" for that truck and they also cannot buy an aftermarket alternator so they have to get one from Ford for $1000.00 and change, and it "might" take care other problem.

The truck had some wiring chewed by varmints last year, therefore the reference to wiring "map."

The quote is $1,300.00 alternator and labor.
I checked with O'Reily's and they can't get one, Twighlight Zone said they could order one from a vendor for $749.00 plus $8-$12. shipping depending on when you want it.

I can't believe a shop tells a customer that for $1,300. It "might" fix the problem?

Any thoughts? Thanks!
 
Reply
Old Mar 26, 2025 | 08:33 AM
  #2  
scott91370's Avatar
scott91370
Fleet Mechanic
15 Year Member
Liked
Loved
Community Favorite
Joined: Dec 2008
Posts: 1,913
Likes: 135
From: Burleson, Tx
If you get it started and voltage goes up when running it's not the alternator. And I doubt it is.

O'Reilly and AutoZone can check the battery and alternator both while still in the truck. I'd start there. Sure wouldn't pay someone $1300 for something that might not fix.
 
Reply
Old Mar 26, 2025 | 09:00 AM
  #3  
540milotalon's Avatar
540milotalon
Thread Starter
|
Laughing Gas
15 Year Member
Joined: Sep 2007
Posts: 871
Likes: 5
From: Near Shenandoah Valley
I neglected to add the reason "I think it's the alternator" is I had the battery charged and with the truck running it only reads battery voltage which slowly drops off after starting and running a high electronics use vehicle.

My digital voltmeter is pretty accurate. So I recommended to my daughter to take it off and have the alternator checked remote from truck. I guess this shop doesn't want to get that far and not have another one to install, tying up their bay?
 
Reply
Old Mar 26, 2025 | 10:59 AM
  #4  
Beechkid's Avatar
Beechkid
Moderator
20 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2002
Posts: 6,104
Likes: 384
From: Southern California
Club FTE Gold Member
Originally Posted by 540milotalon
The truck is daughter #1's truck, 2021 F150, 2.7 turbo
not charging and I "think" it's an alternator.
Knowing I am extremely swamped she drove it to a shop, after a couple days of no contact she calls them.
They tell her they "think it's the alternator." They tell her they cannot get a "map of the wiring" for that truck and they also cannot buy an aftermarket alternator so they have to get one from Ford for $1000.00 and change, and it "might" take care other problem.

The truck had some wiring chewed by varmints last year, therefore the reference to wiring "map."

I can't believe a shop tells a customer that for $1,300. It "might" fix the problem?

Any thoughts? Thanks!
Yes....the system is controlled by the computers (multiple, sensors, etc.) and is a very, very complex system- short answer, it ain't like it used to be.... need to hook up a diagnostic siftware (Forscan, etc.) and really see what is going on............. which hasn't been done obviously
 
Reply
Old Mar 27, 2025 | 11:09 AM
  #5  
charlie g's Avatar
charlie g
FTE Community Team
Joined: Dec 2023
Posts: 8,855
Likes: 4,266
From: sussex county, nj
Club FTE Gold Member
if it is the alternator rock auto parts show 3 from motorcraft for 600 and under, dom you know how the cable ends look? any signs of corrosion will stop the computer from working properly
 
Reply
Old Mar 27, 2025 | 02:01 PM
  #6  
Split rims's Avatar
Split rims
Fleet Mechanic
5 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Mar 2021
Posts: 1,653
Likes: 1,337
https://www.tascaparts.com/oem-parts...ernator-gl8993
 
Reply
Old Mar 30, 2025 | 12:38 PM
  #7  
JKBrad's Avatar
JKBrad
Moderator
Veteran: Army
20 Year Member
Liked
Loved
Joined: May 2005
Posts: 8,229
Likes: 1,247
From: San Antonio, TX
Club FTE Gold Member
Almost always on a newer Ford truck, it's going to be that battery itself. The OEM batteries are notorious for having a short life. I would retrieve the truck from the shop, or at least, since it's there, have them install a new quality battery so you don't get hit with a big diagnostic fee. It's going to need a new one anyway, as AGM batteries don't take well to being recharged.

If the problem occurs again, take it to an ASE certified, independent shop with a high online rating. One where they don't guess, and have proper Ford licensed diagnostic equipment.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Csnell3732
Large Truck
4
Jan 19, 2022 09:32 PM
Josethef100
1961 - 1966 F-100 & Larger F-Series Trucks
34
Aug 10, 2020 12:43 AM
CharlsChainCharlson
1973 - 1979 F-100 & Larger F-Series Trucks
17
May 18, 2016 06:51 PM
Rexman
Electrical Systems/Wiring
1
Jul 5, 2006 09:47 AM




All times are GMT -5. The time now is 04:11 AM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-5
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-6
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-7
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-8
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE