battery light came on
Thread Starter
|
Posting Guru
Joined: Sep 2010
Posts: 1,329
Likes: 0
From: Grand Bay, Al
battery light came on
The alt is fairly new. It was put on before I bought the truck. I checked at the batteries with my meter. I have 12.69 while running. I checked at the alt and got the same. Is there anything else I need to check before spending another 200$?
Thread Starter
|
Posting Guru
Joined: Sep 2010
Posts: 1,329
Likes: 0
From: Grand Bay, Al
Sorry. I forgot posting from the phone doesn't show the sig without going to the normal version. So here it is!!!!!!
Last edited by bcaughhorn; May 16, 2011 at 03:34 PM. Reason: stupid phone
Senior User
Joined: Oct 2009
Posts: 453
Likes: 0
From: Dade City, FL
If you're reading low voltage at the alternator post and the light is on and all your connections are good, you can pretty well bet the alternator is bad. Have you had it tested? I recently gave $112.35 for a rebuilt Motorcraft unit. $200 seems awfully high to me. 
Thread Starter
|
Posting Guru
Joined: Sep 2010
Posts: 1,329
Likes: 0
From: Grand Bay, Al
The po put the alt on before I got it. I've only had the truck about 9 months
Trending Topics
Thread Starter
|
Posting Guru
Joined: Sep 2010
Posts: 1,329
Likes: 0
From: Grand Bay, Al
If you're reading low voltage at the alternator post and the light is on and all your connections are good, you can pretty well bet the alternator is bad. Have you had it tested? I recently gave $112.35 for a rebuilt Motorcraft unit. $200 seems awfully high to me.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
Thread Starter
|
Posting Guru
Joined: Sep 2010
Posts: 1,329
Likes: 0
From: Grand Bay, Al
dont know if this killed my alt or not but i went to look at a 91 f350 for my pops. the truck has been sitting for a year or so. i had a new battery in my shed so i brought it and put it in the truck. i know one batt isnt enough but better than jumper cables on both. i had cables on one with the new battery in the truck. i got it to spin over a few times. i left and drove about 30 minutes home and the battery light came on the next time i started the truck.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
Not sure on the jumping deal but with my truck with year and a half old batteries with a newly rebuilt Alt. with my lights all on I don't see below 13.7 volts, with all the running lights and toys on too. I'm at 14.2-4 volts without lights on just cruising. Before you go swapping out that alt. look for a local rebuilder around, it really pays, seriously.
Laughing Gas
Joined: Aug 2005
Posts: 831
Likes: 0
From: Port Elgin, On
My battery light came on this winter and the speedo went dead too. But when I tested it and gave it a little throttle the output went up to 17.5!!!! Turned out the regulator went on the alt. Giver a rev next time you test it and see what it says.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
Thread Starter
|
Posting Guru
Joined: Sep 2010
Posts: 1,329
Likes: 0
From: Grand Bay, Al
Ill try that. I had that happen in a suburban. It started pushing 19 volts and boiled a pair of red tops