Alternator Fire... now what? - 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 08-03-2012, 11:13 PM
Registered User
 
Last photo:
Join Date: Aug 2010
Location: Edmonton, canada
Posts: 55
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Alternator Fire... now what?

Good day gents! Well earlier this week i was driving the truck around (62 GMC) and after a day of driving, the truck stalled and the cab filled with smoke. I lifted the hood to find the power wire, from the positive terminal of my rebuilt alternator to be melted all the way to the starter. Its a delco 3 wire. It stalled previously that day but started with no issues. One thing i noticed while driving it in the last year, is at idle the volt gauge red just over 12v and while cruising about 13.

So my question is, what if anything did i do wrong? And was the problem possibly the alternator. If so, what should it be replaced with?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-04-2012, 12:46 AM
Registered User
 
Last photo:
Join Date: Mar 2009
Location: Burton, MI
Posts: 794
Wiki Edits: 0

Thanks: 38
Thanked 15 Times in 14 Posts
First off, what gauge is the wire?

second of all, why no fuseable link to prevent this from happening?

thirdly.. it would seem that wire grounded to something... most likely the hot exhaust manifold.


ASSUMING that's a typical 10ga alternator wire... I'm not aware of anyway to draw that much current through a wire that size to get it that hot.. short of a short-circuit to ground.. (at least, not with what you would have on board a 62 GMC pickup)

I had the same thing happen to me once.. I Figured that wire was ok laying on the intake manifold... I forgot a stock iron intake had an exhaust cross-over passage that got hot enough to melt insulation... 'ooops' thankfully the fuseable link went first and just killed everything in the car.. left me dead-sticking it at 70mph.. very interesting expierence.. lol
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-04-2012, 06:05 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,389
Wiki Edits: 31

Thanks: 2
Thanked 58 Times in 54 Posts
I'v seen it happen before, on a rebuilt alternator. Shorted internally, causes the alt to get HOT, caused the alt to basicly meltdown and the wires melted from drawing amperage
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-04-2012, 06:36 AM
Registered User
 
Last photo:
Join Date: Mar 2009
Location: Burton, MI
Posts: 794
Wiki Edits: 0

Thanks: 38
Thanked 15 Times in 14 Posts
This is why a fusible link should always be installed!
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-04-2012, 09:02 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,389
Wiki Edits: 31

Thanks: 2
Thanked 58 Times in 54 Posts
Quote:
Originally Posted by kc8oye View Post
This is why a fusible link should always be installed!
Should have noted. The Vehicle I had seen it happen to was a factory stock 2004 GMC 1500 with a 5.3. Everything the factory installed was there except for a factory alternator. The rebuilt was an Advance Auto/ Autozone brand IIRC.
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
DO NOT USE QUICKFUEL's 175 ELECTRIC FUEL PUMP - FIRE! FIRE! FIRE! ethn_bert General Rodding Tech 3 05-16-2012 06:49 PM
fire moontanker Off-Topic 0 04-13-2009 03:53 PM
FIRE!!! help Camaro1980 Engine 3 05-23-2007 03:44 PM
Sequential fire vs. Batch fire Injection Siggy_Freud Engine 7 09-08-2004 10:15 AM
no fire!! levens Electrical 8 12-18-2003 09:15 AM


All times are GMT -6. The time now is 02:41 PM.


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.