Where does this connector go? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

USArmyCombatMedic · 10-11-2013, 03:28 PM

Hi all, I have an 87 Chevy R10 with a 5.7L 700 R4 just wondering if you guys know what this electrical connector goes to? Im sure the picture explains most of it but its a green wire running along the top of the firewall. At the end of the wire there is a black 90 degree angle connector with two prongs. I believe it is a female connector but not positive thanks in advance!

bnoon · 10-11-2013, 03:37 PM

Seems like the pressure sensor for the AC system was a green wire in that location, but my connector looked different on my old '86. Is there a connection already plugged into the AC drier right near there???

USArmyCombatMedic · 10-11-2013, 03:53 PM

Thanks for the quick reply. So heres another pic. I think I included the one you were talking about. It was connected to the silver canister in the AC system. There is the 4 way connector on the AC box with a black wire, orange wire, and two blue wires. Then there is a relay looking box under the 4 way connector that has a one way purple wire shooting out of it. All of these are connected in the correct place minus the green one I just unplugged to give you a better look.

I have a feeling it goes lower since it is pretty dirty with gravel dust and such. I just cant find anything it would plug into. The only electrical things on that side of the engine that I know of are the start moter and solenoid and the engine knock sensor which are all correctly hooked up. I am confused :/ Thanks again!

kalbert · 10-11-2013, 07:41 PM

The wire draped over the evaporator box in the first picture is for the compressor clutch. It normally would run along the side of the valve cover to the compressor. It is probably very dirty and greasy from laying on the intake manifold next to a leaky valve cover gasket most of it's life.

USArmyCombatMedic · 10-12-2013, 02:10 PM

Thanks kalbert! After looking at the air compress clutch I cannot seem to find the place to plug it in though. Probably the reason why I could not find it in the first place? can you point me in the right direction? Thanks!

RandyP · 10-12-2013, 07:12 PM

Standing in front of the truck, here are a couple of snap shots to help. It's actually on the front of the compressor, not the back or side.

USArmyCombatMedic · 10-13-2013, 04:18 PM

Thanks guys! I found it and plugged it in! Good pics Randy found it right away! Thanks again.

10-11-2013, 03:28 PM	#1
USArmyCombatMedic Registered User Join Date: Oct 2013 Location: Rushford, MN Posts: 23	Where does this connector go? Hi all, I have an 87 Chevy R10 with a 5.7L 700 R4 just wondering if you guys know what this electrical connector goes to? Im sure the picture explains most of it but its a green wire running along the top of the firewall. At the end of the wire there is a black 90 degree angle connector with two prongs. I believe it is a female connector but not positive thanks in advance! Attached Images

10-11-2013, 03:37 PM	#2
bnoon Registered User Join Date: Jul 2012 Location: Des Moines IA Posts: 1,250	Re: Where does this connector go? Seems like the pressure sensor for the AC system was a green wire in that location, but my connector looked different on my old '86. Is there a connection already plugged into the AC drier right near there??? __________________ - 1981 Sierra 454, NV4500 swap - 2006 Z06, 25k miles - 1973 Nova - Project CarNova Virus on Youtube

10-11-2013, 03:53 PM	#3
USArmyCombatMedic Registered User Join Date: Oct 2013 Location: Rushford, MN Posts: 23	Re: Where does this connector go? Thanks for the quick reply. So heres another pic. I think I included the one you were talking about. It was connected to the silver canister in the AC system. There is the 4 way connector on the AC box with a black wire, orange wire, and two blue wires. Then there is a relay looking box under the 4 way connector that has a one way purple wire shooting out of it. All of these are connected in the correct place minus the green one I just unplugged to give you a better look. I have a feeling it goes lower since it is pretty dirty with gravel dust and such. I just cant find anything it would plug into. The only electrical things on that side of the engine that I know of are the start moter and solenoid and the engine knock sensor which are all correctly hooked up. I am confused :/ Thanks again! Attached Images

10-11-2013, 07:41 PM	#4
kalbert Registered User Join Date: Jun 2012 Location: Minnesota Posts: 509	Re: Where does this connector go? The wire draped over the evaporator box in the first picture is for the compressor clutch. It normally would run along the side of the valve cover to the compressor. It is probably very dirty and greasy from laying on the intake manifold next to a leaky valve cover gasket most of it's life.

10-12-2013, 02:10 PM	#5
USArmyCombatMedic Registered User Join Date: Oct 2013 Location: Rushford, MN Posts: 23	Re: Where does this connector go? Thanks kalbert! After looking at the air compress clutch I cannot seem to find the place to plug it in though. Probably the reason why I could not find it in the first place? can you point me in the right direction? Thanks!

10-12-2013, 07:12 PM	#6
RandyP Getting Old; Going Broke Join Date: Apr 2010 Location: Owasso OK Posts: 2,764	Re: Where does this connector go? Standing in front of the truck, here are a couple of snap shots to help. It's actually on the front of the compressor, not the back or side. Attached Images __________________ *Why is every used 350 sbc out of a corvette?* There's only two things that excite a man, expensive toys and real expensive toys. *VEGETARIAN: That's an old Indian word meaning "I don't hunt so good."* When the going gets tough, switch to power tools.

10-13-2013, 04:18 PM	#7
USArmyCombatMedic Registered User Join Date: Oct 2013 Location: Rushford, MN Posts: 23	Re: Where does this connector go? Thanks guys! I found it and plugged it in! Good pics Randy found it right away! Thanks again.



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