Alternator Questions - 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 08-06-2011, 02:34 PM
Powerstroke.org Rookie
 

Join Date: Aug 2011
Location: LANCASTER, CA.
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thumbs down Alternator Questions

I had battery Troubles. I thought it may have been the batteries I purchased from PepBoys. The batteries would only last about 2 months. If I let my truck sit for 2 weeks without starting it, the batteries would completely die. I replace a total of 4 sets or 8 batteries in my 2000 F450. after the 4 set of batteries went bad I had the alternator tested. it was putting out only 11.5 volts. I replaced the alternator. i had the charging systen check at AutoZone with the device they use and it showed the voltage regulator failure. I took the alternator off and replaced it with a newer one and retested with the same results. now could there be something else going on here or just 2 bad alternators fresh from auto part store? Help me out here!

Last edited by DarealBigDaddy; 08-06-2011 at 02:37 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 08-06-2011, 05:17 PM
Serving Our Country!
 

Join Date: Aug 2007
Location: Manor, TX
Posts: 2,890
Thanks: 0
Thanked 18 Times in 17 Posts
Feedback Score: 2 reviews
Could be two bad alternators or could be a issue with the truck. Check to see if your getting voltage at the alternator, check that all the cables are tight and check the small plug on top of the alternator.
Reply With Quote Quick reply to this message
  #3  
Old 08-06-2011, 08:29 PM
Member
 

Join Date: Jun 2008
Location: Memphis, TN
Posts: 41
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have gotten two rotten alt.s in a row.

If you have a multi-tester (digital is best for this as accuracy is crucial) start the truck and turn on lights, wipers, radio and ac running. Place multi tester in proper vDC range ( no more than 6 -10 V) and Neg lead on out-put from alternator and positive on the positive battery post of each battery while helper raises RPM to about 1200. If the reading is greater than 0.2 v DC you may have bad battery connections or internally coroded cables that are providing too much resistence.

The same can be done for the ground cables with the negative lead from the tester on the alternator body and the positive lead from the tester on the neg battery terminal. Again do not want to see more than 0.2 v DC.

I had an ambulance with dual alternators and kept burning up batteries (it had three). Turns our the bottom alt was smoked but the main problem was the cable to the rear two batteries was so internally coroded that it was about to catch on fire.

A quick, non-scientifc test is to carefully feel the positive cable to the batteries as the alternator is charging them. Too much heat = high resistence.

Do not over-look the batter connectors. Be sure they are tight and corrosion free. Hops this helps, sorry for the length

Last edited by eagledieselmedic; 08-06-2011 at 08:32 PM.
Reply With Quote Quick reply to this message
  #4  
Old 08-06-2011, 10:20 PM
Powerstroke.org Rookie
 

Join Date: Aug 2011
Location: LANCASTER, CA.
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thanks for the responses. ill take all of this into consideration. Ill start with the plug on the alternator.
Reply With Quote Quick reply to this message
  #5  
Old 09-03-2011, 07:24 AM
Powerstroke.org Rookie
 

Join Date: Aug 2011
Location: LANCASTER, CA.
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Electrical Issues

My batteries are being drained. I changed out my alternator because it was only putting out 11.5 volts. the new alternator appears to be putting out 14.8 but batteries are still being pulled down. Now after charging the batteries I get a clicking noise as if the terminals are loose. Ive cleaned and tightened but still get the clicking noise. On top of that all of the lights on the dash, interior lights and everything that can come on when the ignition is turned to the start position starts flashing off and on. Truck just clicks when i try to start it. " Help a Brutha OUT"
Reply With Quote Quick reply to this message
  #6  
Old 09-03-2011, 05:54 PM
Serving Our Country!
 

Join Date: Aug 2007
Location: Manor, TX
Posts: 2,890
Thanks: 0
Thanked 18 Times in 17 Posts
Feedback Score: 2 reviews
Check the voltage at the batteries and in the cab while starting. I'm guessing the battery voltage is decent and your loosing power in a bad cable or terminal.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Tags
alternator problems, charging system

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 09:03 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