Pontiac Firebird 1967-2002 Birds of a feather flock together

Alternator help

Thread Tools
 
Search this Thread
 
Old Nov 3, 2015 | 05:16 AM
  #1  
trevmust's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Aug 2012
Posts: 536
Likes: 0
From: Vancouver, BC
Default Alternator help

Alternator wire from battery melted... all the way along the wire. When I replace it will putting an inline fuse help, or should I use a different gauge wire.
Reply
Old Nov 3, 2015 | 10:29 PM
  #2  
Paul Bell's Avatar
That's MISTER MODERATOR
20 Year Member
Photogenic
Liked
Loved
iTrader: (9)
 
Joined: Nov 2005
Posts: 7,615
Likes: 65
From: NYC
Default

Why did this happen?
Reply
Old Nov 4, 2015 | 01:42 AM
  #3  
trevmust's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Aug 2012
Posts: 536
Likes: 0
From: Vancouver, BC
Default

P/o put a stereo in and didn't upgrade the stock 63-66 amp alternator. Melted along the whole wire.
Reply
Old Nov 4, 2015 | 06:28 AM
  #4  
Paul Bell's Avatar
That's MISTER MODERATOR
20 Year Member
Photogenic
Liked
Loved
iTrader: (9)
 
Joined: Nov 2005
Posts: 7,615
Likes: 65
From: NYC
Default

63 amp? What year is this Firebird?

Usually a melted wire indicates a short or severely heavy load.

When an alternator is bad, it stops putting out power, not burn up cables.

https://ls1tech.com/forums/generatio...g-threads.html
Reply
Old Nov 5, 2015 | 03:18 PM
  #5  
trevmust's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Aug 2012
Posts: 536
Likes: 0
From: Vancouver, BC
Default

Originally Posted by Paul Bell
63 amp? What year is this Firebird?

Usually a melted wire indicates a short or severely heavy load.

When an alternator is bad, it stops putting out power, not burn up cables.

https://ls1tech.com/forums/generatio...g-threads.html
I pulled the old wire, had like six things spliced into it. I ran a new alternator only wire, I'm running two seperate wires for the distributor and another wire I found spliced into my alternator wire.
Reply
Old Nov 5, 2015 | 03:24 PM
  #6  
Paul Bell's Avatar
That's MISTER MODERATOR
20 Year Member
Photogenic
Liked
Loved
iTrader: (9)
 
Joined: Nov 2005
Posts: 7,615
Likes: 65
From: NYC
Default

Originally Posted by Paul Bell
63 amp? What year is this Firebird?

Usually a melted wire indicates a short or severely heavy load.

When an alternator is bad, it stops putting out power, not burn up cables.

https://ls1tech.com/forums/generatio...g-threads.html
Hullo??
Reply
Old Nov 7, 2015 | 06:20 AM
  #7  
trevmust's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Aug 2012
Posts: 536
Likes: 0
From: Vancouver, BC
Default

Originally Posted by Paul Bell
Hullo??
1980.
So anyways. I ran 8ga wire to the alternator with only one join in it, and two additional wires for the other two that were spliced into my old alternator wire . So now the distributor, alternator, and the third red wire have their own decdicated power source now
Reply
Old Nov 8, 2015 | 11:38 PM
  #8  
Paul Bell's Avatar
That's MISTER MODERATOR
20 Year Member
Photogenic
Liked
Loved
iTrader: (9)
 
Joined: Nov 2005
Posts: 7,615
Likes: 65
From: NYC
Default

Originally Posted by trevmust
Alternator wire from battery melted... all the way along the wire.
Usually when this happens, there was a short on the other end of the wire. All the splicing you do won't tell you where the short was.

Originally Posted by trevmust
When I replace it will putting an inline fuse help, or should I use a different gauge wire.
If it was in fact a short, the fuse will blow when you apply power.

Before you start replacing and adding parts, first confirm what caused the problem.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Nov 13, 2015 | 02:44 AM
  #9  
trevmust's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Aug 2012
Posts: 536
Likes: 0
From: Vancouver, BC
Default

Originally Posted by Paul Bell
Usually when this happens, there was a short on the other end of the wire. All the splicing you do won't tell you where the short was.



If it was in fact a short, the fuse will blow when you apply power.

Before you start replacing and adding parts, first confirm what caused the problem.

Runs like a champ now, pretty sure it's cuz the guy had everything running on one wire.
Found an engine harness on ecklers though. Gunna buy that when I have some dough.
Reply
Old Nov 13, 2015 | 10:15 AM
  #10  
y2k_ta's Avatar
'Bird Director
20 Year Member
Photogenic
Photoriffic
Liked
iTrader: (80)
 
Joined: Dec 2001
Posts: 12,829
Likes: 30
From: Central Indiana Honors: 4th grade spelling bee contestant
Default

Having multiple components running off what I assume was a factory wire wasn't a good idea at all. The wire gauge was more than likely too small for the current draw, and that contributed to the melting.
Reply
Old Nov 13, 2015 | 04:29 PM
  #11  
trevmust's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Aug 2012
Posts: 536
Likes: 0
From: Vancouver, BC
Default

Originally Posted by y2k_ta
Having multiple components running off what I assume was a factory wire wasn't a good idea at all. The wire gauge was more than likely too small for the current draw, and that contributed to the melting.
8ga nicked to **** and back unprotected soldering, ect.
Reply




All times are GMT -5. The time now is 12:49 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE