whats the part number on the new sensor? maybe you can find a pinout diagram for it. usually you can find schematics for electronic parts. maybe even cross referencing it to another application or vehicle that has a wiring pinout
or maybe just ask dunlop or whom ever it was acquired from for the spec sheet.

 

Oceanbrave,

I think you are doing more work on this than me, I am more determined to get it going for you, thank you again for all your assistance.

It is early here and I am off to work now so I probably will not get a chance to swap the pins around until later in the week. I will keep you posted.

Bronxteck,

Dunlop are slow and difficult to communicate with, I have already emailed them for assistance with the wiring and had no reply, as Oceanbrave said, I have nothing to loose now so I will just swap the wires and see what happens.

 

i found this site in the UK that has the solenoids and the dunlop part numbers they also have the air fittings and other parts. maybe can use the dunlop part numbers to source the parts local. https://www.miessler-automotive.com/...Compressors_20
it would be help full to have the part number of the assembly you ordered

 

Hmmr it's not always easy to find time, I struggle with that too.

Having looked online I've found dozens of sensors with similar connectors (if not the same) everyone of them shows the opposite pinout to the GM info I found (see below)


It seems hard to believe GM chose a non-standard sensor, so perhaps the have got the info wrong?

From all the data I've gathered I believe the original sensor has the following specifications:-There are plenty of sensors with the new style connector, same thread etc, so if your new sensor is defective we can probably find a compatible one with the new style connector and either the old thread or new thread (whatever it is)

So if you get a chance to measure the new thread size (I'm assuming its different?) perhaps you could post the details.

Hope it works....

 

OceanBrave,

I think you are on to something, the diagram in the 2008 manual that you provided of the connector that plugs into the solenoid pressure sensor is connected on the drawing to what I assume is the solenoid block behind it, and if this is correct it would not have a male connector on it, it should be a female connector with pins, like the old one and the replacement one that I have, therefore I must have 1&2 swapped around.

I am getting excited again, I will keep you all posted, Thank you.

 

 

Oceanbrave,

It's done, all good, everything is working perfectly, it maintains ride height at 60 psi, doesn't run when not needed and the extended ride height button now works correctly as it should. All this aggravation for two wires around the wrong way.

I thank you very much for all your assistance, you will be known as THE HUMMER MAN.

 

Hmmr that's fantastic news and what a huge "learning curve"

I's good to know reversing the pressure sensor pins is safe, that the "Height Sensor Current" (now 22mA was17mA) is pretty much as expected and also the "Rear Levelling Air Press" readings of 60 psi 1.04 Volts are very close (2.5%) to the predicted values below:-

You've put in a lot of time and effort into your AS unit and it's good you've been rewarded at long last - great job 👍👍👍

 

which ECU did you finally wind up using. the original or the new one? do you have any part numbers so that others can repair there units?

 

From Hmmr's posts his system uses the newer GM 89060585 ECU which supersedes GM10363984 & GM89038593, earlier single compressor systems used the GM 15205558.


Supplier data suggest the GM 89060585 is 2003-2007 compatible, but single compressor systems are missing a few features, specifically the "Exhaust Current" measurement (C1-24) and "Right Compressor Over-Temperature" (C1-9) so its more likely this ECU is only 2005-2007 compatible but not 100% sure.

Some details or PNos for the new valve block could prove very useful to many people.