New Alternator = Battery Drain - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 08-01-2005, 08:39 PM
Member
 
Join Date: Aug 2002
Location: Fallon, NV
Posts: 180
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
New Alternator = Battery Drain

I recently installed a new GM alternator in my '65 Mustang. Eliminating the external regulator really cleaned things up. I had originally tried to go with a one-wire setup, but that was doomed from the start. The 3-wire setup is much better. Now it appears I have a battery drain somewhere. If I leave it sit for a couple of days, the battery is dead. I wired it according to a number of helpful posts on this site - even used an indicator light. Any thoughts on this? Thanks in advance.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-01-2005, 09:12 PM
Ratchet's Avatar
Member
 

Last journal entry: Ontario Camaro Nationals 2008
Last photo:
Join Date: Dec 2004
Location: London Ontario Canada Aye
Age: 56
Posts: 334
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Try This

1. Charge the Battery

2. disconnect negative battery terminal and connect muti-meter between negative post of battery and negative battery terminal

3. If there is a drain on the battery big enough to make it go dead there should be more than .4 milli amps registering on the meter.

4. if there is unplug one fuse at a time in the fuse panel until you find the one that makes the meter fall to the normal range. (trouble shoot that circuit to find problem)

5. if no fuse affects the meter reading disconnect the two wire plug from the alternator if that makes the reading fall to normal the alternator is a fault.

Hope this helps

Ric
__________________
Ric
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-02-2005, 11:46 AM
Member
 
Join Date: Aug 2002
Location: Fallon, NV
Posts: 180
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks. I'll give it a go.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-02-2005, 01:59 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Easy solution

Doc here,

Did it do this BEFORE you changed the charging system?

Quick and dirty Solution, Charge the battery up with a Charger, 10 amps 6 to 8 hours..Get a load test..If it passes,

Take it home, unplug ALL the alternator Wires and let it sit an equal amount of time, If it IS not dead, replace the Alternator..you have an OBF on the diode Pack forward biasing, and causing a load just sitting...

If It IS dead, do the load test on individual circuits as outlined in prior post..

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need help please with an electrical headake bowtieorbust Electrical 15 01-26-2006 03:01 PM
battery drain? 62galaxiguy Electrical 4 06-05-2005 08:03 PM
Dead Battery-HELP!? 5window Electrical 4 04-29-2005 08:56 PM
Battery Drain IAMCANADIAN Electrical 7 09-18-2003 09:51 PM
MSD causing battery drain 72elcamino Electrical 4 09-02-2003 10:59 PM


All times are GMT -6. The time now is 05:39 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.