Alternator conversion trouble. - 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 11-26-2004, 08:07 AM
New Member
 
Join Date: Mar 2004
Location: phx az
Posts: 16
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Alternator conversion trouble.

I recently converted my 65 nova to a 10 si alternator and have been having problems that I am at a loss to explain. I Ran a 10 ga. wire to the pos. battery terminal, the sensing wire to the horn relay. I hooked the field terminal to switched 12 volts. I noticed that the alt. was overcharging so I think, bad reg. and replace the alt with a new one. Much to my dismay I find out that the new one is doing the same thing. It will sit there idling at 14.5 and then all of the sudden it will max out at 16-17 volts and start to boil the battery intermintently. On and off like there is a loose connection but unfortunately I have checked everything to no avail. The only thing that is questionable to me is the #1 field wire hook up which from my understanding doesnt do anything in my application anyway. The other thing is when I installed the alt. I used a cheap parts store pigtail which was shorting out the sensing wire against the case in both cases. I took the old one in to be tested and they said it was good?! I am wondering if alternators fail intermintently or not.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-27-2004, 04:46 PM
Old enough to know better
 
Join Date: Aug 2004
Location: Denver, CO
Posts: 417
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I'd guess a problem in the sense wire. Make sure it has a bullet-proof connection to battery voltage. If the voltage on it drops or goes away, the alternator will try and compensate by going to maximum output until the sense circuit shows normal voltage.
Alternators usually don't fail intermittantly but connections sure do.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-28-2004, 02:09 AM
New Member
 
Join Date: Mar 2004
Location: phx az
Posts: 16
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I figured out the problem. The cheap auto parts pigtail connector had a really loose fit allowing the plastic to melt on the back of the connector. This in turn allowed the sensing wire to ground out against the alt case. It damaged the regulator.\
Replaced the regulator and it worked great! Sometimes the most obvious things arent so obvious.
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:
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.




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



All times are GMT -6. The time now is 10:44 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.