73, wiring question
Thread Starter
Advanced
Joined: Dec 2006
Posts: 89
Likes: 0
From: easton pa
73, wiring question
Good morning,just purchased a 73,L82, 4spd. Always wanted one! Trying to solve some "BUBBA" wiring issues. Could really use a 1973 schematic. Currently working on blower..(no high speed)..read all the posts here...seems 72 and 74 are not the same as a 73...I have no in line fuse on the drivers side...however I did find a dead orange wire that I assume used to go to the blower relay...no sure where it originates from. Then I see that "Bubba" spliced into my purple wire that goes to blower with the blue wire that goes into the plug on the blower resistor. I have the 3 low speeds but no high. The relay only has the black ground,the purple,and the blue wires connected.Ant help would be appreciated...thanks!
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
The wire on the driver side that is connected to the horn relay starts out red from the horn relay then connects to a inline fuse. The other side of that inline fuse is where the orange wire starts. The orange wire should go to your fan relay.
Thread Starter
Advanced
Joined: Dec 2006
Posts: 89
Likes: 0
From: easton pa
Thanks Roco...but not the case on my 73...I traced the orange wire from the blower relay all the way back to the two main plugs on the rear of the fuse box.Disconected that plug,cleaned contacts,looks like the orange wire is connected to the furthest inboard spade. Having done that I connected my meter to the end of the wire at the blower relay and then probed all the fuse contacts and no continuity...so...I am baffled at this point. I have read every post about the horn relay to the wire in question and in line fuses...to no avail...
Thread Starter
Advanced
Joined: Dec 2006
Posts: 89
Likes: 0
From: easton pa
Thank you, I sent him an email this morning,he will send to me. Unfortunately, I am not hopeful it will tell me what I need to know. I traced my orange wire from the blower relay all the way to the main connection at the rear of the fuse block. No where along the way was any in line fuse...so I am thinking 1973 was a year for some different things than a 72,or a 74...
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
I believe someone has done some creative wiring on your car. 72 and 73 A/C wiring should be the same. 71 is a little different as it has a a couple of "anti dieseling" relays that cause the compressor to kick on for 3 seconds when shutting the engine off. Sound as if someone has tried to source power for the high speed fan from the fuse box rather than horn relay.
In your first post you mentioned that you had three wires going to the blower relay. you should have two connection. One with a black wire and another with three wires purple, dark blue and a orange.
In your first post you mentioned that you had three wires going to the blower relay. you should have two connection. One with a black wire and another with three wires purple, dark blue and a orange.
Last edited by Roco71; Apr 15, 2014 at 04:04 PM.
Thread Starter
Advanced
Joined: Dec 2006
Posts: 89
Likes: 0
From: easton pa
I believe someone has done some creative wiring on your car. 72 and 73 A/C wiring should be the same. 71 is a little different as it has a a couple of "anti dieseling" relays that cause the compressor to kick on for 3 seconds when shutting the engine off. Sound as if someone has tried to source power for the high speed fan from the fuse box rather than horn relay.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Pro
Joined: Jul 2004
Posts: 605
Likes: 0
From: Alta Loma CA
There is a wire with an inline fuse going to the horn relay. That is the blower high speed. Without it you will not have high speed. Why it's set up that way I have no idea but ' 73 has it and I had no high speed when the fuse holder fell apart from old age.
Le Mans Master
Joined: Aug 2006
Posts: 7,411
Likes: 1,551
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
73 wo/ac
http://willcoxcorvette.com/product_i...ducts_id=27790
If 73 & 74 are the same and you have ac this might be correct
http://willcoxcorvette.com/product_i...ducts_id=27790
If 73 & 74 are the same and you have ac this might be correct
Thread Starter
Advanced
Joined: Dec 2006
Posts: 89
Likes: 0
From: easton pa
73 wo/ac
http://willcoxcorvette.com/product_i...ducts_id=27790
If 73 & 74 are the same and you have ac this might be correct
http://willcoxcorvette.com/product_i...ducts_id=27790
If 73 & 74 are the same and you have ac this might be correct