Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150
Sign in using an external account
Register Forgot Password?


1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 10-24-2011, 07:17 PM
Sooner73415 Sooner73415 is offline
New User
 
Join Date: Oct 2011
Posts: 2
Sooner73415 is starting off with a positive reputation.
Charging system problem!!

I have a 2003 f150 xlt flareside. I am having major charging system problems. Last night the charging system warning light came on. Today I replaced the alternator and had the battery checked. Both are good to go, but my battery is still draining and the light is still on. Fuses appear good. No idea what is going on, someone please help!!
Reply With Quote
  #2 (permalink)  
Old 10-24-2011, 07:53 PM
Bluegrass 7 Bluegrass 7 is offline
Postmaster
 
Join Date: Sep 2006
Posts: 4,744
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
You need to make a test to see if the system is chargeing.
Place a voltmeter accross the battery and observe the voltage just after cranking and startup.
It should show 15 plus volts and taper back in just a few minutes as an indication the system is chargeing under regulator control.
There is a charge lead fuse on the firewall called a megafuse with 175 amp rateing.
There should be a second fuse in an inline holder near the alternator. It is a 20 amp.
Be sure the plugup at the alternator is set in tight and no blades are bent over.
A little about the charge lamp circuit.
It is powered through the ignition switch and a fuse.
If it lights it shows that circuit is complete and good.
It lights when it gets a ground from the alternator regulator.
When the alternator is outputting at a high enough level, the regulator take the ground away and the charge light goes out as an indication the alternator is outputting.
If it stays on, there is a system issue with the alternator.
Maybe you got a bad replacement.
Check it out first so you know what you have.
.
Replacing parts without final testing leaves you in confusion.
Good luck.
Reply With Quote
  #3 (permalink)  
Old 10-24-2011, 08:00 PM
Sooner73415 Sooner73415 is offline
New User
 
Join Date: Oct 2011
Posts: 2
Sooner73415 is starting off with a positive reputation.
I've already done all this. Mine is a 2003, it does not have the inline fuse, nor the mega fuses on the firewall. My problem still exists. I'm not getting any voltage from the orange/blue wire coming out of the alternator harness.
Reply With Quote
  #4 (permalink)  
Old 10-25-2011, 01:04 PM
Bluegrass 7 Bluegrass 7 is offline
Postmaster
 
Join Date: Sep 2006
Posts: 4,744
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Well ok for not having the fuses.
If you see an issue, change the alternator again.
You don't have many choices.
Reply With Quote
Old 10-25-2011, 01:04 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 1997 - 2003 F150

Tags
1978, 1996, 2003, 2007, 250, charge, charging, check, diesel, f100, f150, ford, light, system, truck, warning, windsor

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 12:32 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.5.2 ©2010, Crawlability, Inc.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup