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

'72 A/C, blower relay wire connection

Thread Tools
 
Search this Thread
 
Old Mar 28, 2011 | 01:48 PM
  #1  
mach172's Avatar
mach172
Thread Starter
4th Gear
 
Joined: Nov 2010
Posts: 4
Likes: 0
Default '72 A/C, blower relay wire connection

I in the middle of wiring installation on my '72. All systems seems working except A/C, ventilation and blower motor. Unfortunatelly I have damaged connector on the A/C or blower relay located in the A/C blower cover in the engine bay There are four wires, black, purple, yellow (blower?) and blue. I do not know how to connect it.
My 72 wiring nor assembly manual is not covering this part. Does anybody have this schematic ?
I am not planing to have A/C working due to missing condenser however want at least ventilation/blower running
Reply
Old Mar 28, 2011 | 02:17 PM
  #2  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,413
Likes: 1,552
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default

There is a heater/A/C diagram listed for a 74,might be the same for your 72.
http://www.nrjvette.com/johdotukset/?c=d;o=d
Reply
Old Mar 28, 2011 | 02:26 PM
  #3  
mach172's Avatar
mach172
Thread Starter
4th Gear
 
Joined: Nov 2010
Posts: 4
Likes: 0
Default

Thanks a lot for this schematic. It seem 74 wire colors are matching with 72. I will do another trials over next weekend.
Reply

Get notified of new replies

To '72 A/C, blower relay wire connection





All times are GMT -4. The time now is 10:36 PM.

story-0
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
story-1
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-2
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-3
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-4
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-5
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-6
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-7
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-8
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-9
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE