C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

1971 alternator wiring question -help

Thread Tools
 
Search this Thread
 
Old Jun 15, 2016 | 08:38 PM
  #1  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default 1971 alternator wiring question -help

Have a 71 350 and connector on top of alternator cracked. I forgot to mark which connector goes in which terminal side of new connector (1 vs 2) which are marked on back of alternator. One wire is black with white stripe. Other wire is slightly thinner and brownish grey in color. Car has original harness and alternator type. Any help or picture would be great. My guess is b/w wire into T1 spade. Thx
Attached Images  
Old Jun 15, 2016 | 08:49 PM
  #2  
'75's Avatar
'75
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
Default

#2 should be battery, voltage all the time, #1 should have voltage with key on.
Old Jun 15, 2016 | 08:58 PM
  #3  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default

Originally Posted by '75
#2 should be battery, voltage all the time, #1 should have voltage with key on.
Can you direct me with wire color. Striped wire to which spade terminal, 1 or 2?
Old Jun 15, 2016 | 09:02 PM
  #4  
'75's Avatar
'75
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
Default

The smaller wire, brownish should be #1.
Old Jun 15, 2016 | 09:30 PM
  #5  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default

Thanks. I agree. Found this picture on web
Attached Images  
Old Jun 15, 2016 | 09:42 PM
  #6  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default

Difference is red wire is black with white stripe on my car. Not sure why.

Last edited by RizVet; Jun 15, 2016 at 09:42 PM.
Old Jun 16, 2016 | 08:59 AM
  #7  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default

Could I ask someone with a 71 (Alan?) to post a picture of their alternator wiring for me? thanks!
Old Jun 16, 2016 | 09:19 AM
  #8  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,285
Likes: 4,374
From: Westminster Maryland
Default

Hi R,
This is still the original alternator from my 71.
I hope it helps you.
Heavy red, medium black, small brown/small black w/white stripe.
Regards,
Alan








Last edited by Alan 71; Jun 16, 2016 at 09:22 AM.
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Jun 16, 2016 | 10:27 AM
  #9  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default

Thanks Alan!!!!
Old Jun 16, 2016 | 09:35 PM
  #10  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default

What does the brown wire do/control?
Old Jun 16, 2016 | 09:59 PM
  #11  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,427
Likes: 1,560
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default It's the sense wire.

Originally Posted by Riz71WBY
What does the brown wire do/control?
Answer:
http://www.delcoremy.com/Alternators...s/Remote-Sense
Old Jun 16, 2016 | 10:30 PM
  #12  
RizVet's Avatar
RizVet
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2010
Posts: 316
Likes: 29
From: Long Island, NY
Default

Originally Posted by Peterbuilt
Interesting article. Mentions an 'S' terminal designation as the remote sense spade but the alternator you have shows a 'R' which I'd guess means remote. Strange or am I not seeing this right?
Old Jun 16, 2016 | 11:47 PM
  #13  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,427
Likes: 1,560
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default

I'll guess that you have a '10SI' alternator, so you have a #1 terminal and a #2 terminal.
The article is 'in general' but the point is the sense wire tells the alternator to put out more or less volts.
Old Jan 31, 2024 | 08:40 AM
  #14  
19_stingray_74's Avatar
19_stingray_74
2nd Gear
 
Joined: Dec 2023
Posts: 2
Likes: 0
Default Alternator Problems

Originally Posted by RizVet
Thanks. I agree. Found this picture on web
Where does the Green wire connect to?
Old Jan 31, 2024 | 11:50 AM
  #15  
Tampa Jerry's Avatar
Tampa Jerry
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Top Answer: 1
 
Joined: Aug 2005
Posts: 6,541
Likes: 1,975
From: Temple Terrace Florida
Default

This thread is from 2016. On the picture the green wire connects to the temperature sending unit in the head. Jerry
Old Jan 31, 2024 | 12:07 PM
  #16  
vettebuyer6369's Avatar
vettebuyer6369
Administrator
25 Year Member
Community Builder
Loved
Community Favorite
 
Joined: Jul 2000
Posts: 53,988
Likes: 6,212
From: About 1100 miles from where I call home.
Default

Originally Posted by 19_stingray_74
Where does the Green wire connect to?

Good time to start a new thread, people can post existing photos, etc.

Get notified of new replies

To 1971 alternator wiring question -help





All times are GMT -4. The time now is 08:13 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE