1979 A/C wiring
Thread Starter
Cruising
Joined: Dec 2013
Posts: 13
Likes: 0
From: Blossom Texas
1979 A/C wiring
Well, I have reached the highest point in my A/C knowledge and I could use some help with this one. I am restoring a 79 and the previous owner (or others) disconnected the A/C and I am unable to tell what is missing. According to the wiring diagram the Green wire from the compressor goes into the " compressor control switch." The reason I used quotes is because I can find no part called the "compressor control switch" in any catalog. Additionally, the number on the wiring diagram identifying the part is 12004480 which I also can't find anywhere. I am definitely showing my ignorance here but I would rather have the answer than the pride. Attached are two pictures of two loose wires. They probably connect through this mystery part. Can anyone with a 79 give me some advice on where I should turn at this point? I appreciate it.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
I appreciate the photo's but they are of no help. Not in focus. I can not see the end of the tan wire...and the other photo...I can not tell what you are pointing to....so I have to guess.
NOW...One thing you can do is get a laminated wiring diagram...unless the one you have is accurate.
The tan wire in the first photo can possibly be the wire that goes to the solenoid on the drivers side of the carb that aids in increasing the idle when you have the A/C on.
The "compressor control switch" can be the pressure switch that is installed in the lines of your A/C system. So when the pressure is correct...the switch will allow the green wire going to your compressor to get power and make the compressor work. It is a safety feature.
Photo 2: If it is a light blue wire...it is for the alarm system and it goes to that plunger switch mounted on your firewall....and this switch will also have a white and or black wire going to it also.
DUB
NOW...One thing you can do is get a laminated wiring diagram...unless the one you have is accurate.
The tan wire in the first photo can possibly be the wire that goes to the solenoid on the drivers side of the carb that aids in increasing the idle when you have the A/C on.
The "compressor control switch" can be the pressure switch that is installed in the lines of your A/C system. So when the pressure is correct...the switch will allow the green wire going to your compressor to get power and make the compressor work. It is a safety feature.
Photo 2: If it is a light blue wire...it is for the alarm system and it goes to that plunger switch mounted on your firewall....and this switch will also have a white and or black wire going to it also.
DUB
Racer
Joined: Mar 2011
Posts: 480
Likes: 42
From: Los Angeles CA
I appreciate the photo's but they are of no help. Not in focus. I can not see the end of the tan wire...and the other photo...I can not tell what you are pointing to....so I have to guess.
NOW...One thing you can do is get a laminated wiring diagram...unless the one you have is accurate.
The tan wire in the first photo can possibly be the wire that goes to the solenoid on the drivers side of the carb that aids in increasing the idle when you have the A/C on.
The "compressor control switch" can be the pressure switch that is installed in the lines of your A/C system. So when the pressure is correct...the switch will allow the green wire going to your compressor to get power and make the compressor work. It is a safety feature.
Photo 2: If it is a light blue wire...it is for the alarm system and it goes to that plunger switch mounted on your firewall....and this switch will also have a white and or black wire going to it also.
DUB
NOW...One thing you can do is get a laminated wiring diagram...unless the one you have is accurate.
The tan wire in the first photo can possibly be the wire that goes to the solenoid on the drivers side of the carb that aids in increasing the idle when you have the A/C on.
The "compressor control switch" can be the pressure switch that is installed in the lines of your A/C system. So when the pressure is correct...the switch will allow the green wire going to your compressor to get power and make the compressor work. It is a safety feature.
Photo 2: If it is a light blue wire...it is for the alarm system and it goes to that plunger switch mounted on your firewall....and this switch will also have a white and or black wire going to it also.
DUB
http://willcoxcorvette.com/popup_ima...?pID=26980.jpg
Racer
Joined: Mar 2011
Posts: 480
Likes: 42
From: Los Angeles CA
http://forums.corvetteforum.com/c3-t...nd-engine.html
Thread Starter
Cruising
Joined: Dec 2013
Posts: 13
Likes: 0
From: Blossom Texas
idle control solinoid
Thanks for your help. I know where it goes now. It is supposed to connect to the idle control solenoid which is missing from the carb. I need to locate one of those and its on to the next mystery.
