Climate control console vacuum hose diagram needed

Tiny
YASIRDAHHAM
  • MEMBER
  • 1995 PONTIAC GRAND AM
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 240,000 MILES
Kindly help me attach the vacuum hoses leading from the climate control console to various gates within my car's dashboard. I have four loose vacuum hoses (multi-colored ones, pale green, dark blue, violet, and red) and the cool air coming out of the A/C freezer gets distracted rather than hit my face with a strong draught like before. The attached images are for: main vacuum hose (thin black one) coming from the engine side along with the main harness reaching the right side of the engine compartment and down through the dashboard, as shown here next to the PCM), the 4 console, loose vacuum hoses, console connections (including a yellow one). With due thanks for you dear friends.
Monday, July 4th, 2022 AT 7:15 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,313 POSTS
Thanks for the images they help, below is the HVAC vacuum line diagram so you can get the car put back together. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed. Thanks for using 2CarPros. Com.
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Tuesday, July 5th, 2022 AT 4:52 PM
Tiny
YASIRDAHHAM
  • MEMBER
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Such a great service dear sir, and a speedy one too! Thank you very much, just what I needed to solve the problem. Now I know for sure the following critical points:
1. The two actuators marked with yellow and green respectively are need further hose connections not just the respective hoses (yellow and green): The actuator marked with a green label also demands the blue hose too, in return; the actuator marked with a yellow label also demands the connection of the red vacuum hose.
2. The violet line connects to the main vacuum line coming from the engine side. Before I received your invaluable scheme, I and the electrician would be puzzled as to which of the five hoses connects with the main vacuum line, but here, I have one query please:
I have two vacuum lines coming along the main harness, you can see them both here in the first attachment marked with a raw red circle: one is grey in color coming through the cluster of connectors in the extreme right side of the engine compartment down to near the PCM while the other is a black one with a rather very stiff narrower plastic tube coming from somewhere behind the cassette player as I believe. I have noticed the same stiff black hose going through a small wire connector behind the engine going into the engine to that location behind the cassette player.
P.S: The second attachment shows the fresh air actuator, we used to connect it to the main vacuum line using a rather thicker black rubber hose as marked in yellow circle here.
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Wednesday, July 6th, 2022 AT 2:05 PM
Tiny
KEN L
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Okay, I am not sure what you are asking here, can you please clarify?
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Wednesday, July 6th, 2022 AT 5:20 PM
Tiny
YASIRDAHHAM
  • MEMBER
  • 186 POSTS
The main vacuum line (white grey in color) comes from the engine's compartment to the space over the PCM inside the car body. Another vacuum line (black in color) is also there as the image shows. According to the diagram you kindly sent, the violet vacuum hose should be connected to the main vacuum line. Which of the two vacuum lines is the main vacuum line? The white, grey or the black one?
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Thursday, July 7th, 2022 AT 11:12 AM
Tiny
KEN L
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When you start the engine can you feel vacuum through one or both of them? I believe the black one is the one that is used, but I could be wrong.
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Saturday, July 9th, 2022 AT 9:28 AM
Tiny
YASIRDAHHAM
  • MEMBER
  • 186 POSTS
It is the white grey one that has vacuum power, the black one has no suction power. I attached the violet hose to that white/grey tube, but the A/C system is not charged with refrigerant yet. I will have it charged in a few days' time and will be updating this thread accordingly. Best regards for your patience and help.
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Sunday, July 10th, 2022 AT 10:05 AM
Tiny
KEN L
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No problem, let us know what happens.
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Sunday, July 10th, 2022 AT 1:29 PM

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