Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

Alternator problems

Thread Tools
 
Search this Thread
 
Old Jul 31, 2010 | 09:48 PM
  #1  
Maroslut2001's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Feb 2009
Posts: 225
Likes: 0
From: Morrison, Colorado
Default Alternator problems

Just got my motor put in and running but i am getting no charge out of my alternator... As i was pulling the motor and everything apart before the red wire did have some tension on it for a night cause i forgot to disconnect it, Tomorrow i will will be testing the wire for power just to check if its the connector that is messed up or not.

Is there anything else that might be the problem? I have read that there is a resistor in the wiring somewhere is it possible that the resistor came apart from the tension and where is the resistor located?

Oh one more question does the little red wire have power when the key is on or does it have to be running?
Reply
Old Aug 1, 2010 | 07:39 AM
  #2  
crainholio's Avatar
TECH Addict
iTrader: (2)
 
Joined: Aug 2003
Posts: 2,977
Likes: 3
Default

On a 2001 harness there is no resistor, the PCM feeds proper voltage to the alternator's exciter pin "L" via the connector's single red wire.

The wire should have voltage w/ the key in RUN position, engine not running if I recall right. If you probe it and find no voltage, I'd start the engine and re-test.
Reply
Old Aug 1, 2010 | 11:24 AM
  #3  
Maroslut2001's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Feb 2009
Posts: 225
Likes: 0
From: Morrison, Colorado
Default

Cool thanks for the help!!!
Reply
Old Aug 1, 2010 | 02:17 PM
  #4  
Maroslut2001's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Feb 2009
Posts: 225
Likes: 0
From: Morrison, Colorado
Default

Update!!! Little red wire has power and so does the connector, so i am gonna take the alternator up and have it tested... I ordered the alternator through rock auto i have heard a couple people saying with a reman alt. they have had to hook a 12volt power wire to the other center pin on the alternator could this possibly be my problem?
Reply
Old Aug 1, 2010 | 02:19 PM
  #5  
Maroslut2001's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Feb 2009
Posts: 225
Likes: 0
From: Morrison, Colorado
Default

Also i painted my alt. bracket could it not be grounded correctly due to the paint? i would think the bolts would ground it pretty good
Reply




All times are GMT -5. The time now is 07:41 PM.

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