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

LS1 Relay

Thread Tools
 
Search this Thread
 
Old May 18, 2012 | 06:48 PM
  #1  
jordan89's Avatar
jordan89
Thread Starter
Safety Car
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Mar 2009
Posts: 3,558
Likes: 4
From: Oakland California
Default LS1 Relay

Guys, I know that there is a sticky on LS1 swaps, and I have read pretty much the whole thing. I've been collecting parts for the swap on my '74 Vette, but have always wanted to ask this question; what relays/fuses are a must have for the swap, and how did you guys go about wiring them up? I want to do my own wiring, and don't want to spend $600 for this. I have a '00 SS Automatic Camaro that would be the donor car.
Reply
Old May 18, 2012 | 06:56 PM
  #2  
72LS1Vette's Avatar
72LS1Vette
Safety Car
20 Year Member
 
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
Default

Does this help?



Rick B.

Reply
Old May 18, 2012 | 10:00 PM
  #3  
Solid LT1's Avatar
Solid LT1
Le Mans Master
10 Year Member
 
Joined: Dec 2003
Posts: 5,727
Likes: 39
From: Fremont CA
Default

The Fbody harness is said to be one of the best to make a custom harness out of, LS1tech.com has some threads on it.
Reply
Old May 18, 2012 | 11:20 PM
  #4  
jordan89's Avatar
jordan89
Thread Starter
Safety Car
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Mar 2009
Posts: 3,558
Likes: 4
From: Oakland California
Default

Originally Posted by 72LS1Vette
Does this help?



Rick B.

So one for the fuel pump, fan, but is the water pump relay only if you have an electric water pump? For the other three relays, I just locate those pins on the harness and plug them to those relays?



Originally Posted by Solid LT1
The Fbody harness is said to be one of the best to make a custom harness out of, LS1tech.com has some threads on it.
I've looked throughout a bunch of threads, but my question still went unanswered. I pretty much have the fuel system down for the swap. The plates, I already have an idea of what I would use. For now, I would probably run the 4spd Muncie while I locate a T56.

Last edited by jordan89; May 18, 2012 at 11:25 PM.
Reply
Old May 19, 2012 | 08:48 AM
  #5  
72LS1Vette's Avatar
72LS1Vette
Safety Car
20 Year Member
 
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
Default

Originally Posted by jordan89
So one for the fuel pump, fan, but is the water pump relay only if you have an electric water pump? For the other three relays, I just locate those pins on the harness and plug them to those relays?

I've looked throughout a bunch of threads, but my question still went unanswered. I pretty much have the fuel system down for the swap. The plates, I already have an idea of what I would use. For now, I would probably run the 4spd Muncie while I locate a T56.
The connector labels (C101, etc) are from the 2001 F-body wiring diagram. The relay I have labeled as Water Pump is also the Fan1 circuit in the wiring. I ended up using Fan1 for the electric fan and deleting Fan2 since I only have 1 fan and no AC. I wired the electric water pump to always run with the key on as recommended by Meziere.

It really is just a matter of locating the wires in the harness and connecting them to the relays.



Rick B.
Reply
Old May 19, 2012 | 11:33 AM
  #6  
jordan89's Avatar
jordan89
Thread Starter
Safety Car
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Mar 2009
Posts: 3,558
Likes: 4
From: Oakland California
Default

Originally Posted by 72LS1Vette
The connector labels (C101, etc) are from the 2001 F-body wiring diagram. The relay I have labeled as Water Pump is also the Fan1 circuit in the wiring. I ended up using Fan1 for the electric fan and deleting Fan2 since I only have 1 fan and no AC. I wired the electric water pump to always run with the key on as recommended by Meziere.

It really is just a matter of locating the wires in the harness and connecting them to the relays.



Rick B.
Thank you Rick. I'm going to make sure I save a copy of this diagram, which is very helpful. This part of the wiring that confused me the most, but this truly has been lots of help.
Reply

Get notified of new replies

To LS1 Relay





All times are GMT -4. The time now is 04:42 PM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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