A/C electrical problems
Thread Starter
Advanced
Joined: Nov 2004
Posts: 64
Likes: 0
A/C electrical problems
I have a 1980 vett the A/C was not hooked up and there was at some time a fire under the hood. I have put a whole new A/C system in only to discover there not current going to the low pressure switch so no current to the compressor. Also, I don't find a slectrical A/C switch on the console only the vaccum selector. Last but not least there are a couple of electrical connectors near the compressor that are not connected to anything.
Where is the electrical switch to send current to the compressor?
Does the curent go through relays etc.?
Can I send streight 12volts to the low pressure switch and not dammage the system?
Bobby in Mississippi
Where is the electrical switch to send current to the compressor?
Does the curent go through relays etc.?
Can I send streight 12volts to the low pressure switch and not dammage the system?
Bobby in Mississippi
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
First: Remove dr. side console side, the el. switch is in front (towards dr.) of the controls, while the vac. lines go into the rear.
If there is enough freon in the system, then power can be applied directly.
If there is enough freon in the system, then power can be applied directly.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Look carefully for the switch.
Yes, I said above:
If there is enough freon in the system, then power can be applied directly. (to the pressure switch)
Use at least a 25 Amp. switch & 16 wire.
Yes, I said above:
If there is enough freon in the system, then power can be applied directly. (to the pressure switch)
Use at least a 25 Amp. switch & 16 wire.
Thread Starter
Advanced
Joined: Nov 2004
Posts: 64
Likes: 0
thanks
Thanks so much for the information. I am pretty sure there is no switch on my consol. Some previous owner was named Buba and disconected or failed to do many things right. I think the switch was removed or replaced by a control system that was not for a car with A/C. I will possible get a good switch and good power source and run a temporary set up to get my A/C going since I have just installed everything else new and it is hot here in Mississippi.
Bobby in Mississippi
Bobby in Mississippi
Melting Slicks
Joined: May 2004
Posts: 2,474
Likes: 487
From: Willowbrook IL
St. Jude Donor '13-'14-'15-'16
Bobby,
I strongly suggest that you get a good wiring diagram. That alone will anwer a lot of questions. Also recommend the service manual from GM and the AIM.
But even if you don't get the diagram from me, get a wiring diagram.
Don
I strongly suggest that you get a good wiring diagram. That alone will anwer a lot of questions. Also recommend the service manual from GM and the AIM.
But even if you don't get the diagram from me, get a wiring diagram.
Don
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs 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
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
If you have determined you don't have an A/C switch, do you already have a planned switch setup? Do you have an El. rear Defog. switch?
Last edited by Ganey; Jul 13, 2005 at 11:05 AM.