Battery/alternator problem - Ford Powerstroke Diesel Forum
6.0L Problems Forum Having Trouble? Post here

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 11-21-2010, 09:48 AM
Member
 

Join Date: Apr 2007
Posts: 44
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Battery/alternator problem

Wife's truck is having issues, it won't start without a jump.
alt is putting out 14v and both batteries read 12.6v separated off and 13.5v running I'm checing for a draw right now but do the readings on the batteries soud ok, my f350 7.3 reads the same about 12.6v on both batteries.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 11-21-2010, 09:53 AM
shhhhh, can you hear it?

 

Join Date: Feb 2010
Location: wichita,ks
Posts: 2,236
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
if it doesnt die going down the road its not your alt,or its just barely starting to go anyway.sounds like something else.i would say batts but if your other truck is reading the same i dont know.how old are they?and how cold is it?
Reply With Quote Quick reply to this message
  #3  
Old 11-21-2010, 10:49 AM
Member
 

Join Date: Apr 2007
Posts: 44
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
the batteries are 3 years old, I drove it for a little while and they charged back up to 12.6v. We are in South Louisiana it hasn't been verry cold. It seems to be an intermitent problem, i've noticed over the last month or so that occasionally it will turn over slowly but has always started. I cleaned the posts and cables that seemed to help some and then she went to leave work last night and it was dead.
Reply With Quote Quick reply to this message
  #4  
Old 11-21-2010, 07:20 PM
Compression Ignition Addict
 

Join Date: Sep 2010
Posts: 1,043
Thanks: 0
Thanked 15 Times in 15 Posts
Feedback Score: 0 reviews
can you do a load test and test the cells with a hydrometer. poor mans load test= good volt meter, leave the lights on for 1 minutes then have someone start it while you test voltage at the battery. 10.5-11.5 while cranking and the batteries are ok
Reply With Quote Quick reply to this message
  #5  
Old 11-21-2010, 08:22 PM
shhhhh, can you hear it?

 

Join Date: Feb 2010
Location: wichita,ks
Posts: 2,236
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
^^^^^check that.but if it keeps it up from there id say its the batts.depending on what kind they are they may be old and cruddy.to have a sure check on it take it to auto zone and have them test the alt. while its on the truck.
Reply With Quote Quick reply to this message
  #6  
Old 11-22-2010, 03:49 AM
Member
 

Join Date: Nov 2010
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
If your alternator is puting out more than 14V it isn't the problem. I had the same issue this weekend, batteries dropping to 12.4V. Turns out one of my batteries (drivers side) was pulling down the other until they were in equalibrium. You may have a shorted cell in one of your batteries which is dropping your available cranking amps.

I took my truck to Wal Mart, had them seperate the batteries and analyze them. One battery was down to 150CCA, the other 650CCA. If you're going to replace one, replace both. For $168 I replaced both with 850CCA batteries and my truck now works like a champ. They are the same batteries as the AutoZone Duralast, but at less than half the price.
Reply With Quote Quick reply to this message
  #7  
Old 11-22-2010, 04:11 AM
Compression Ignition Addict
 

Join Date: Sep 2010
Posts: 1,043
Thanks: 0
Thanked 15 Times in 15 Posts
Feedback Score: 0 reviews
another thing is to totally clean all the battery connections and top up the water. the posts will develop a hard scale that really resist electric current.
Reply With Quote Quick reply to this message
  #8  
Old 11-24-2010, 07:55 AM
Powerstroke.org Fanatic
 

Join Date: Sep 2010
Posts: 106
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I just replaced my alternator for similar issues. My edge showed it putting out 13.5 -14.2 but my batteries would crank slowly in the morning and would test 12.1-12.4. While driving it to have the alternator checked I noticed that the volts dropped to 11.8 but would shortly move back to 14.0. Apparently my alternator was working intermittently. Replaced my alternator and no issues.

Batteries tested good.
Reply With Quote Quick reply to this message
  #9  
Old 01-06-2011, 05:36 PM
Powerstroke.org Rookie
 

Join Date: Sep 2008
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
My truck, has also not started a few times. Taken batteries out had them tested, both 5xx cranking amps and 12volts about. Alternator, with truck running The truck sat for 4 days and started.

But today, it barely started, I drove for 15 minutes, shut it off and immediately it would not start. 11-12 volts, jumped it, and the alternator 13.5volts. When at idle the radio would shut-off, presumably from not having enough power.
Reply With Quote Quick reply to this message
  #10  
Old 01-06-2011, 05:39 PM
shhhhh, can you hear it?

 

Join Date: Feb 2010
Location: wichita,ks
Posts: 2,236
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
sounds like the alternator for sure.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 09:43 PM.


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