Battery Light - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-12-2013, 08:24 AM
Powerstroke.org Rookie
 

Join Date: Sep 2013
Posts: 28
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Question Battery Light

Today my battery light came on, so I checked the batteries and one battery runs at 14v and the other battery runs at 12.5v. The batteries always used to run at the same around 14v. The battery on the passenger side is the one running at 12.5v Both batteries are only one year old. Did I blow a fuse or something? All help appreciated.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 09-12-2013, 08:30 AM
Compression Ignition Addict
 

Join Date: Aug 2008
Location: Madison, WI
Posts: 3,071
Thanks: 2
Thanked 72 Times in 70 Posts
Feedback Score: 0 reviews
Not a fuse. Did you make sure that the glow plugs had cycled off before checking these voltages? Which one did you check first?

Where does the voltmeter on the dash read after the glow plugs have cycled off?

It would also be good to know the voltages of the batteries while the engine is off, but you need to isolate them from one another. Disconnect the negative terminal on the driver's side battery and measure the voltage of each battery, with the key out. If you have or can borrow a load tester, it would be good to load test each battery as well; again, you would need to separate them by disconnecting one of the negative terminals.
Reply With Quote Quick reply to this message
  #3  
Old 09-12-2013, 08:50 AM
Powerstroke.org Rookie
 

Join Date: Sep 2013
Posts: 28
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
With key out and batteries disconnected the battery on passenger side reads 12.5v and driver side reads 12.83v. I started it up and battery light went out. With the truck running I tested The passenger side battery again and on the battery terminals It reads 12.5. But when I put the multi meter on the metal things connected to the battery (forget name) I get 14v. I have another battery I can put in if that would help.

Last edited by DieselNic; 09-12-2013 at 08:59 AM.
Reply With Quote Quick reply to this message
  #4  
Old 09-12-2013, 09:20 AM
Compression Ignition Addict
 

Join Date: Jul 2013
Location: Centerport, PA
Posts: 278
Thanks: 6
Thanked 17 Times in 14 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by DieselNic View Post
With the truck running I tested The passenger side battery again and on the battery terminals It reads 12.5. But when I put the multi meter on the metal things connected to the battery (forget name) I get 14v. I have another battery I can put in if that would help.
Sounds like a bad connection between the battery post and terminal clamp. Otherwise, there no reason those readings should be different. if I understand your test correctly.

Disconnect the cables, clean the posts and terminals real good with a cleaning tool. Spray on some anti corrosion and reconnect.
Reply With Quote Quick reply to this message
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:

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
Display Modes

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



All times are GMT -8. The time now is 06:00 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors