Alternator issue? - Ford Powerstroke Diesel Forum
6.0L Problems Forum Having Trouble? Post here

 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 11-09-2013, 06:26 AM Thread Starter
Member
 
Join Date: Jun 2011
Posts: 55
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Alternator issue?

A week ago I had my tensioner explode, threw the belt 1/2 mile from home, made it home, repaired the truck, and noticed afterwards the voltage would drop to 12.5 on my scan guage while running, started checking into it and found one battery at 11.6 static and 8.7 under load passenger side, driver was 12.5 and 11.7 while cranking, placed battery in question on the charger and retested, 12.2 static and 10.8 cranking, took the truck down to autozone this am and had them test the alt came back bad diode, the guy doing the test didn't seem to know what he was doing IMO I explained to him twice that the truck needed to run for a min or so to shut the GP off, each time he tested right away. Don't want to spend 200 bucks if I don't have to, any recommendations would be good, while driving on the scan gauge the voltage runs from 13-14v, occasionally drops to 12.5 at idle but right back to 13-14 while driving
mtbxdrew is offline  
post #2 of 5 Old 11-09-2013, 08:46 AM Thread Starter
Member
 
Join Date: Jun 2011
Posts: 55
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Anyone? I don't want to continue driving it and potentially burn up a ficm or something else
mtbxdrew is offline  
post #3 of 5 Old 11-09-2013, 09:01 AM
Powerstroke.org Fanatic
 
JayAF98's Avatar
 
Join Date: Apr 2012
Location: Cheyenne, WY
Posts: 122
Thanks: 2
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I had the same issue with the parts store here. They couldn't understand that you have to wait. I ended up pulling my alternator and having them bench check it. When it tested bad then I believed them.

Sent from AutoGuide.com Free App
JayAF98 is offline  
post #4 of 5 Old 11-09-2013, 09:49 AM
Compression Ignition Addict
 
Join Date: Dec 2008
Location: port arthur texas
Posts: 4,222
Thanks: 1
Thanked 62 Times in 58 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Thats kinda why I always take my alt's and starters to a rebuilers shop. They have better test equipment and knowledge than at most retail stores like AZ or even oreilly.


Lord I shall lead them to the water but I will not try to make them drink
dannyboy950 is offline  
post #5 of 5 Old 11-10-2013, 05:23 PM Thread Starter
Member
 
Join Date: Jun 2011
Posts: 55
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
took it in this am and had them test it, only put out 8.3v on their tester, put in a new one to compare 15.4v, took it home and installed on the truck 14.2 all day long
mtbxdrew is offline  
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