CarAudioForum.com

Go Back   CarAudioForum.com > Discussion Forums > Car Audio: Advanced

Reply
Old 07-14-2000, 09:57 AM   #1
Belker

Senior Member
 
Join Date: Feb 2000
Location: Morgantown, WV
Posts: 912
Belker will become famous soon enoughBelker will become famous soon enough



What causes an alternator to fail?

What causes an alternator to fail?

Trying to draw more amps from your electrical system than the alt is designed for will eventually make the alternator fail. Is this correct? What exactly happens in this case?

I've also heard that disconnecting the positive battery terminal while the engine is running can cause a voltage surge that can damage the diodes in an alt. Is this true?

What else can cause an alternator (either the alt or internal voltage regulator) to go bad? (other than wearing out the brushes)
Belker is offline   Reply With Quote

Sponsored Links
Help Syrian Refugees Survive. Donate Now!
Or text REFUGEES to 50555 to give $10 to USA for UNHCR
Old 07-14-2000, 03:10 PM   #2
gtirod

Member
 
Join Date: Mar 2000
Location: Indiana
Posts: 45
gtirod is on a distinguished road



If you overtax an alternator it fries. Gets too hot, stuff breaks or melts, diodes, regulators and such. Worst case is that your car will catch on fire, especially if wiring is too small or faulty.
Call an electrical auto shop or a place like Battery Masters. They can expand on my theory.
gtirod is offline   Reply With Quote

Old 07-16-2000, 03:37 AM   #3
smart_cookie

Dudley Due Right
 
Join Date: Sep 1999
Location: Truro nova scotia canada
Posts: 1,534
smart_cookie is on a distinguished road



Belker, unhooking the pos batt terminol is a deffinate no no, a guy i went to tech with did that on a cadalac and instantly caused 4000 dollars canadian damage to the vehicle heres what haappans
the voltage actually enters the batt through the pos terminal, the batt is 12 volts (ok 12.6 or so) in order to keep this charge and run the accesorys the alt must put out roughly 14.4 volts, the alt knows how much to put out because it sees the resistance that the batt has, now if you remove the pos terminal the alt sees an infinate resistance and trys to charge what is not there, the alt is capable of producing thousands and thousands of volts and when it has nothing to hold it back (batt, the voltage regulater only regulates upon what it sees for resistance, so no resistance means no regulater either) it does produce the thousands of volts, in an ideal case your fusable links will blow before any real damage but this is not always the case and in my buddys case at tech all the computers and sensors were imidiatly fried, this voltage can actually kill a human if he/she holds the terminal and a ground at the same time
sorry so long winded and im sure i didnt help you out any with your questions but i hope someone learned something http://www.caraudioforum.com/smile.gif
smart_cookie is offline   Reply With Quote

Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:37 AM.
Powered by vBulletin® - Copyright © 2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1996 - 2011 by CarAudioForum.com - all rights reserved.