No signal to A/C compressor relay

Tiny
ASEMASTER6371
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Sounds good.

Roy
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Monday, September 2nd, 2019 AT 4:43 PM
Tiny
DARKFREELIFE
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I'm back. I think I did the testing wrong. I was by numbers of the relay but I think is not right.
Key on I do get 14 volts on 2 pins according to the relay numbers is pin 30, 86? What are the chances that the numbers of relays are wrong? Out of the 4 pins of the relay, only 2 of them supposed to be hot correct?
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Monday, September 2nd, 2019 AT 5:25 PM
Tiny
ASEMASTER6371
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Yes.
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Tuesday, September 3rd, 2019 AT 12:10 AM
Tiny
DARKFREELIFE
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Okay, so that means the relay is working and I am getting control voltage.
Does that mean the AC pressure switch is the issue?
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Tuesday, September 3rd, 2019 AT 10:52 AM
Tiny
ASEMASTER6371
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No, if the relay is clicking, the compressor should come on.

Roy
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Tuesday, September 3rd, 2019 AT 11:13 AM
Tiny
DARKFREELIFE
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My last message did not post. My relay was clicking because I was jumping the wrong pins
30, 85 are getting power, without any jumping wirers.
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Tuesday, September 3rd, 2019 AT 11:27 AM
Tiny
ASEMASTER6371
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Okay, then the ground for the control side, which is the PCM, is the issue. It will not ground the relay until it sees the correct signal from the pressure switch.

Do you have a scan tool to monitor the switch?

Roy
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Tuesday, September 3rd, 2019 AT 11:44 AM
Tiny
DARKFREELIFE
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I have a basic scanner wont read any AC sensor. In case of switch is the problem you thing might be a broken wire or something else? Last shop I took it they did trace down to the switch not getting any power. That's when they said ECM was bad and I bought a new one put it on and nothing.
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Tuesday, September 3rd, 2019 AT 12:37 PM
Tiny
ASEMASTER6371
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Double-check for voltage to the pressure switch. You should have 5 volts.

Roy
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+1
Tuesday, September 3rd, 2019 AT 1:03 PM
Tiny
BRIAN.MCCAUL
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Can I ask a question when ASEMASTER6371 says to replace the fuse box is this correct or is it the replay box as I have identical problems “There is a common bus bar that feeds different terminals.

You need the whole fuse block.

Yes, you can jump it temporarily until you repair it correctly.

Roy”
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Saturday, April 15th, 2023 AT 6:31 AM
Tiny
AL514
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Hello, you will have to make a new post for this question. It is required for new questions. This post is 3 years old. Thank you.
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Tuesday, April 18th, 2023 AT 10:16 AM

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