Battery light flashing - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 49 Old 05-10-2012, 02:19 PM Thread Starter
Member
 
Jingoist's Avatar
 
Join Date: Mar 2010
Posts: 59
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Battery light flashing

My battery light has been flashing when I cold start my truck.

It flashed erratically and then after 30 seconds to 2 minutes it turns off completely. It won't do it after the truck has been warmed up and driven or while driving.

At idle the voltage reads 13.83 and with the A/C and Radio blasting it went down to 13.55.

I'm thinking it may just be a fuse or a lose ground cable. I just can't seem to find where the grounds are or what fuse it could be. Batteries are two weeks old as well.

Last edited by Jingoist; 05-10-2012 at 02:26 PM.
Jingoist is offline  
Sponsored Links
Advertisement
 
post #2 of 49 Old 05-10-2012, 04:53 PM
Compression Ignition Addict
 
Join Date: Sep 2007
Posts: 204
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
Saw something similar, but not exactly like this once due to bumping the exciter wire connector on the top of the alternator -(I had laid across the engine on a blanket to work on a turbo) anyhow it was making intermittent contact and caused some funny stuff with battery light. Worth checking quickly, thats the only idea that comes to mind outside of what you already mentioned.

Early 99 F250
DP Tuner F6 Tunes/Autometer Gauges
4R100 Brian's Truck Shop Tranny/6.0 cooler
Kitty Delete
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Walker BTM
285 75 R16 Cooper ST-Max Stancor Relay
HPOP Crossover Line, 203F Thermostat, Cold Weather Mods,
Wheel bearings updated to Late 99-03

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
-58F, 270k+ miles and still Powerstroke (7.3)Loyal
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
AlaskanEngineer is online now  
post #3 of 49 Old 05-10-2012, 07:47 PM
Compression Ignition Addict
 
smokersteve's Avatar
 
Join Date: Nov 2008
Location: California
Posts: 4,337
Thanks: 0
Thanked 7 Times in 7 Posts
Mentioned: 0 Post(s)
Quoted: 19 Post(s)
Feedback Score: 0 reviews
I have the same issues. it is the alternator.

13Q Trans Fluid Flush
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

FICM Testing Videos
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
smokersteve is offline  
post #4 of 49 Old 05-10-2012, 09:43 PM
War is the answer!


 
WarChild's Avatar
 
Join Date: Feb 2011
Location: Daytona Beach, Florida
Posts: 5,500
Thanks: 218
Thanked 78 Times in 33 Posts
Mentioned: 0 Post(s)
Quoted: 7 Post(s)
Feedback Score: 2 reviews
Its ether your batteries going bad or an issue with your alternator. Get your batteries checked and then you will know.

White 04 F350 Lariat SRW/CC/LB/FX4 227,XXX+
Studs/BPD58V FICM Atlas40/BPD oil cooler/waterpump/7.3 fan
Edge insight CTS EGT/Turbo timer/FP SCT with ? Tune
Powermax w/KC billet wheel Warren 175/30%
5-8" MBRP Off Road Turbo Back/harpoon
2" Leveling/33' BFGATKO
ELC/PMM Coolant filter
aFe Stage2/EGR Delete



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(Always Faithful) is the motto of the Corps. That Marines have lived up to this motto is proved by the fact that there has never been a mutiny among U.S. Marines.

WarChild is offline  
post #5 of 49 Old 05-11-2012, 05:38 AM
Suck, Squish, Bang, Blow!





 
dfuzz78's Avatar
 
Join Date: May 2011
Location: Puyallup, WA
Posts: 6,888
Thanks: 236
Thanked 189 Times in 157 Posts
Mentioned: 2 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by WarChild View Post
Its ether your batteries going bad or an issue with your alternator. Get your batteries checked and then you will know.
+1

I had the same thing happen; Alternator.

Denis "Lt. Sled"
2006 F-350 Crew Cab Long Bed Dark Shadow Gray

462hp / 927ft-lbs Corrected
ARP Head Studs, NUC Motorsports Oil Bypass, CFM+ Intake Elbow, Wicked Wheel 2
Bullet Proof Diesel FICM w/Atlas 40, SCT SF3 w/SPD by TSD! Grover Fire Truck Horns
Cab Light Mod, Blue Spring Mod, Zoodad Mod, High Idle Mod, Lost EGR Mod

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
dfuzz78 is offline  
post #6 of 49 Old 05-11-2012, 09:34 AM Thread Starter
Member
 
Jingoist's Avatar
 
Join Date: Mar 2010
Posts: 59
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by WarChild View Post
Its ether your batteries going bad or an issue with your alternator. Get your batteries checked and then you will know.
Well the batteries are brand new. I'm just stumped as to why the voltages are still acceptable, and it only happens when on a cold start.
Jingoist is offline  
post #7 of 49 Old 05-11-2012, 09:37 AM
Suck, Squish, Bang, Blow!





 
dfuzz78's Avatar
 
Join Date: May 2011
Location: Puyallup, WA
Posts: 6,888
Thanks: 236
Thanked 189 Times in 157 Posts
Mentioned: 2 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by Jingoist View Post
Well the batteries are brand new. I'm just stumped as to why the voltages are still acceptable, and it only happens when on a cold start.
Your voltage regulator is starting to crap out. Unfortunately, it is part of the alternator, so the alternator needs to be replaced or rebuilt.

Denis "Lt. Sled"
2006 F-350 Crew Cab Long Bed Dark Shadow Gray

462hp / 927ft-lbs Corrected
ARP Head Studs, NUC Motorsports Oil Bypass, CFM+ Intake Elbow, Wicked Wheel 2
Bullet Proof Diesel FICM w/Atlas 40, SCT SF3 w/SPD by TSD! Grover Fire Truck Horns
Cab Light Mod, Blue Spring Mod, Zoodad Mod, High Idle Mod, Lost EGR Mod

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
dfuzz78 is offline  
post #8 of 49 Old 05-11-2012, 09:45 AM Thread Starter
Member
 
Jingoist's Avatar
 
Join Date: Mar 2010
Posts: 59
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by dfuzz78 View Post
Your voltage regulator is starting to crap out. Unfortunately, it is part of the alternator, so the alternator needs to be replaced or rebuilt.
I just did a cold start right now, voltage was 12.58 cold, batteries went down to 10.60 while cranking, hit 12.2 until the alternator kicked in and then went up to 14. There was no battery light this time.

These voltages were all taken on the battery terminals. And like I said before, once I start driving the light never comes back on.

Is there a way to test the voltage regulator?
Jingoist is offline  
post #9 of 49 Old 05-11-2012, 11:07 AM
Suck, Squish, Bang, Blow!





 
dfuzz78's Avatar
 
Join Date: May 2011
Location: Puyallup, WA
Posts: 6,888
Thanks: 236
Thanked 189 Times in 157 Posts
Mentioned: 2 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by Jingoist View Post
I just did a cold start right now, voltage was 12.58 cold, batteries went down to 10.60 while cranking, hit 12.2 until the alternator kicked in and then went up to 14. There was no battery light this time.

These voltages were all taken on the battery terminals. And like I said before, once I start driving the light never comes back on.

Is there a way to test the voltage regulator?
Yes, pull the alternator out and have it tested by a reputable alternator repair shop. Don't go to those autopart stores, their tests only last 5-10 seconds and our regulators show problems after that time, so their tests never show it.

I know it's not what you want to hear right now, especially after dropping a few hundred on new batteries. But we have been through this before and it ends up being the alternator. I chased and tightened grounds, replaced batteries, and had to go through 3 different alternators (autozone duralast crap) before the problem was solved. Save yourself time, effort, and headache and go get your alternator repaired or replaced. Try and stay with a Motorcraft alternator...
Good Luck

Denis "Lt. Sled"
2006 F-350 Crew Cab Long Bed Dark Shadow Gray

462hp / 927ft-lbs Corrected
ARP Head Studs, NUC Motorsports Oil Bypass, CFM+ Intake Elbow, Wicked Wheel 2
Bullet Proof Diesel FICM w/Atlas 40, SCT SF3 w/SPD by TSD! Grover Fire Truck Horns
Cab Light Mod, Blue Spring Mod, Zoodad Mod, High Idle Mod, Lost EGR Mod

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
dfuzz78 is offline  
post #10 of 49 Old 05-11-2012, 11:09 AM Thread Starter
Member
 
Jingoist's Avatar
 
Join Date: Mar 2010
Posts: 59
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by dfuzz78 View Post
Yes, pull the alternator out and have it tested by a reputable alternator repair shop. Don't go to those autopart stores, their tests only last 5-10 seconds and our regulators show problems after that time, so their tests never show it.

I know it's not what you want to hear right now, especially after dropping a few hundred on new batteries. But we have been through this before and it ends up being the alternator. I chased and tightened grounds, replaced batteries, and had to go through 3 different alternators before the problem was solved. Save yourself time, effort, and headache and go get your alternator repaired or replaced. Try and stay with a Motorcraft alternator...
Good Luck
I had the batteries replaced for free under warranty, so that isn't a big deal, neither is taking out the alternator. Thanks for the info.
Jingoist is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome