Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Hello. My name is ***** ***** I will be helping you today.
Wheres the air coming out?
If the compressor constantly runs and air is not coming out anywhere the pressure would build up until something exploded. If the compressor is running continuously SOMETHING is leaking. You need to recheck for leaks.
It shouldnt run for more than a minute and the relief valve should not pop and the compressor still run.
Do you have a meter to do some testing?
Its a good start. We can see how far we can get with it and if we end up needing a scan tool we will have to wait.
Just a minute while I pull your vehicle up and look over a diagram on your system.
Do you have an ohm meter?
Unplug the compressor and check the resistance between where the orange wire was and where the dark blue wire was on the compressor side of the connector.
Ill wait for it.
Why would you suspect he moved them around?
They do not appear to be correct. Ill provide a pinout here for you.
Are you checking the compressor sire or the truck wiring harness side?
What do you mean its different on the compressor side. There are two identical but mirrored sides of a plug. They wouldnt plug in to each other if they were different.
OK. A diagram of the compressors wiring between the actual motor and the connector is not available. It is serviced as an assembly. I dont have one here to physically check or I would. If this mechanic is not very skilled with electronics I am going to assume they did not reconfigure the pins.. it would take a terminal removal kit which is an expensive tool not many people who dont know much about electronics would spend the money on.
Im limited to factory information here. I dont have an "internal" wiring diagram on an aftermarket compressor motor to tell you what is what. You would have to email the manufacturer of the compressor to ask them the function of each color wire on their compressor OR dismantle it and see where each wire goes to see if the wiring is right. Their instructions SHOULD tell you which wire on their compressor connects to which wire on the factory connector but I am not looking at their instructions. I do believe the wires are probably not properly installed and that could be your issue but without a wiring diagram from them its only speculation. You cant test the two wires properly without knowing the wires are in the right spot either.
Seems straight forward enough. Red on your new compressor to red on the original connector. Black on your new compressor to black on the original connector. Blue and white on your new compressor to blue and white.
I cant see the other ends of your wires but it would take a really lacking mechanic to mess that up.
Actually thats blue and grey on the factory side but it looks right from what I can see. I actually do see a butt connector there and it looks like the other side is grey.
Ohm test between the blue and grey wires
Check the voltage on the orange wire on the vehicle side while cycling the key on and off.
Actually I confused you with another customer. Yours is constantly running. That will be fine.
At this point you need suspension codes.
There will be suspension codes. I will be around just reply when you get them.
There are suspension codes but none of those are them. Your scan tool just doesnt communicate with the suspension module if you arent getting the codes.
If possible see if any of your friends have a decent scan tool.... snap on, cornwell, tech 2, launch.. all of those and many more will read suspension codes.
If you have the option to put in vehicle information put it in. Many times if you dont put in the year make and model it will only give you generic codes. You have to put in the vehicle information to connect to the ABS, Transmission, Etc.
I am not familiar with your scan tool so I dont know if it supports GM suspension modules.
Does it show live data in the suspension module?
And yeah if it were me that would have been my first move. Im not a fan of the OEM air suspension. They are all problematic.
Unfortunately I have not. With the heat wave we have been having I have been parked at this computer in the air conditioning.. not even working on anything.
Sorry for some reason I didnt get a notice of your reply yesterday. Give me a moment to look this over.
I can not tell whats what by comparing the pictures really. Can you tell me what wire out of the compressor goes to what pin of the factory connector? Im about to the point of asking you to send me the compressor for testing. LOL
My brain isnt in it tonight. Its been a long day. Let me give you a fresh take on my experience in the morning. Im running out of things to have you do or test and its not making sense but Im sure theres something Im missing.
And working with limited tools does make things harder but this one isnt really that complicated. Ive walked people through many, many much harder things before. Im not sure what Im missing here but I will figure it out hopefully after a good night sleep.
OK rereading this I still dont see where you have had it checked for codes. Have you? Its possible Im missing it. Its a long question.
It doesnt put out enough pressure to cause any damage in a few minutes. Go ahead and run the tests. Just give it a few minutes in between each test for the compressor to cool. If the compressor seems to be getting hot throw a box fan on it or something to help cool it.