AC wiring Question - Name this plug. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TJBrown · 03-17-2012, 09:53 PM

Getting the AC ready and got everything working up to this plug. I know this plug got to the AC system but what do the two connections go to. One is a long leg and one is a short leg. When should they connect too?

Also, is there polarity on the compressor? for it matter which is + and which is -?

Thanks in advance

texastruckjunky · 03-17-2012, 10:30 PM

I believe that connects to wiring harness that comes from the compressor. Some will correct me if I am wrong.

TJBrown · 03-17-2012, 10:50 PM

I think so also. Both the connections on the plug are hot too.
Posted via Mobile Device

nerphin · 03-17-2012, 11:47 PM

I'd like to know this too. Mine has nothing on it either, but I don't use my A/C.

**hatzie** · 03-18-2012, 12:02 AM

Dark Green is power to the AC clutch through the pressure cutoff.

Light Green is power for the throttle solenoid. It kicks the idle up to keep the AC load from stalling the engine. What I don't see is the second green wire that runs from the connector through the firewall to the heater control. Probably the camera angle.

nerphin · 03-19-2012, 01:39 PM

Quote:

Originally Posted by hatzie

Dark Green is power to the AC clutch through the pressure cutoff.

Light Green is power for the throttle solenoid. It kicks the idle up to keep the AC load from stalling the engine. What I don't see is the second green wire that runs from the connector through the firewall to the heater control. Probably the camera angle.

For reference, do you, or anybody else, have pictures of the stock setup?

**hatzie** · 03-19-2012, 08:57 PM

Quote:

Originally Posted by nerphin

For reference, do you, or anybody else, have pictures of the stock setup?

No. Just the schematic for the AC subsystem.

03-17-2012, 09:53 PM	#1
TJBrown Registered User Join Date: Jul 2011 Location: Shreveport La Posts: 73	AC wiring Question - Name this plug. Getting the AC ready and got everything working up to this plug. I know this plug got to the AC system but what do the two connections go to. One is a long leg and one is a short leg. When should they connect too? Also, is there polarity on the compressor? for it matter which is + and which is -? Thanks in advance __________________ 85 Silverado SWB

03-17-2012, 10:30 PM	#2
texastruckjunky Registered User Join Date: May 2009 Location: San Antonio,Texas Posts: 220	Re: AC wiring Question - Name this plug. I believe that connects to wiring harness that comes from the compressor. Some will correct me if I am wrong. __________________ Life is to short to drive anything else

03-17-2012, 10:50 PM	#3
TJBrown Registered User Join Date: Jul 2011 Location: Shreveport La Posts: 73	Re: AC wiring Question - Name this plug. I think so also. Both the connections on the plug are hot too. Posted via Mobile Device __________________ 85 Silverado SWB

03-17-2012, 11:47 PM	#4
nerphin Registered User Join Date: Aug 2008 Location: pnw Posts: 93	Re: AC wiring Question - Name this plug. I'd like to know this too. Mine has nothing on it either, but I don't use my A/C.

03-18-2012, 12:02 AM	#5
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,941	Re: AC wiring Question - Name this plug. Dark Green is power to the AC clutch through the pressure cutoff. Light Green is power for the throttle solenoid. It kicks the idle up to keep the AC load from stalling the engine. What I don't see is the second green wire that runs from the connector through the firewall to the heater control. Probably the camera angle.



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