Pressurizing air shocks……

I’ll tackle the c660 for the air compressor relief solenoid first. Seems like a simpler circuit and the SCM and compressor are next to each other. Easy to check for shorts and opens.

Alright back to work, one step at a time. Maybe by this time next year it will be 100% lol

Finally had time to dig into this today. I fixed all the mag ride shock codes the issue was that in one of the main harnesses a rubber gasket was deformed and preventing a few pins from making contact(that’s why the SCM had open circuit codes). Fixed that but still am working on the level control c660 code. That one is pissing me off now because I was trying to fix that one first but still can’t…….

Got it. Truck is 100% now what a ride. It was another wire that wasn’t making contact in a harness.

These trucks are wiring nightmares for sure.

@Doubeleive
One more question maybe you can answer. All the electronics work now and I have zero codes, I can pump up and depressurize the shocks with the scanner, and all the mag shocks pass their self test routines. Truck also rides good once again.

I pumped up the shocks and drove for 15 min. Came back and the shocks are flat with no air. I am assuming I may still have a leak somewhere, I’ll check later.

Do you know of the SCM will throw a code if their is a leak and it senses the air shocks are always deflated? If it does I’m thinking I’ll wait for the code to show up. I know the SCM can read the air pressure sensor and it also knows the ride height with a sensor.

ReaperHWK said:

@Doubeleive
One more question maybe you can answer. All the electronics work now and I have zero codes, I can pump up and depressurize the shocks with the scanner, and all the mag shocks pass their self test routines. Truck also rides good once again.

I pumped up the shocks and drove for 15 min. Came back and the shocks are flat with no air. I am assuming I may still have a leak somewhere, I’ll check later.

Do you know of the SCM will throw a code if their is a leak and it senses the air shocks are always deflated? If it does I’m thinking I’ll wait for the code to show up. I know the SCM can read the air pressure sensor and it also knows the ride height with a sensor.

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I don't think so it never did for me and I have not seen anyone report a code for deflated shocks
the norm is "hey my shocks are blown out and it rides like shit" what can I do? lol
people drive these around and don't even realize the shocks are literally blown out like a pair of teenage tennis shoes, how I don't know, I can tell if mine are even low psi
the codes come up when the ohm reading inside the shock is wrong or not connected or if the ride height sensor gets disconnected or fails, etc.
in some cases depending on how it fails it can limit you to 80mph as a safety feature and may not show a code

***soap and water time***
check all around the bladders and the pump and relief valve, if a airline is not fully seated that could maybe be it.

Doubeleive said:

I don't think so it never did for me and I have not seen anyone report a code for deflated shocks
the norm is "hey my shocks are blown out and it rides like shit" what can I do? lol
people drive these around and don't even realize the shocks are literally blown out like a pair of teenage tennis shoes, how I don't know, I can tell if mine are even low psi
the codes come up when the ohm reading inside the shock is wrong or not connected or if the ride height sensor gets disconnected or fails, etc.
in some cases depending on how it fails it can limit you to 80mph as a safety feature and may not show a code

***soap and water time***
check all around the bladders and the pump and relief valve, if a airline is not fully seated that could maybe be it.

Click to expand...

So the wife started the car up and took it for a drive. She pulled out into the street and I felt the shocks they were pumped up again. She drove around for 20 min and parked. Turned truck off. I went to the truck 5 min later and they were flat.

If they are pumping up and holding pressure the entire time the car is on is that the way they operate?

I’m confused as wether the shocks should be holding air after it’s turned off.

ReaperHWK said:

So the wife started the car up and took it for a drive. She pulled out into the street and I felt the shocks they were pumped up again. She drove around for 20 min and parked. Turned truck off. I went to the truck 5 min later and they were flat.

If they are pumping up and holding pressure the entire time the car is on is that the way they operate?

I’m confused as wether the shocks should be holding air after it’s turned off.

Click to expand...

they should hold air for a long time weeks or even longer, if it was just sitting parked

Doubeleive said:

they should hold air for a long time weeks or even longer, if it was just sitting parked

Click to expand...

Yeah you must be right. I turned the truck on and saw the shocks pump up. I was literally standing there and within 2 min they deflated. I have a good size leak somewhere. Time to get the soapy water!

Wes, I’m asking for myself. if there was a leak wouldn’t the compressor keep running enough for you to hear it constantly on?

Big Mama said:

Wes, I’m asking for myself. if there was a leak wouldn’t the compressor keep running enough for you to hear it constantly on?

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no, the pump is designed for intermittent use only
it is designed to run xx amount of seconds and shut off (per key cycle)
then (during the same key cycle) as far as i know or have experienced it only comes on again if the ride height sensors detect a load, say if you attached a trailer or a couple heavier people stood on the rear bumper.
then (also during the same key cycle) if the load is removed the relief valve opens and lets some pressure out
and I also "think" it is only able to detect that load while in park, otherwise it would be constantly trying to keep the vehicle "level" driving down the road
it's a set it and forget it type of thing, unless you are parked again and change the load (while parked)
and "my" theory about this is when it first pumps the shocks up it "remembers" the shock ohm load, then if you are out driving around and the air leaks out and you stop and park it doesn't try to re-pump the shocks because the "ohm" load is not greater than what it remembers so it does nothing.
I also believe this is how air ride delete (bypass) works using resistors because the ohm load never changes, so the system thinks all is well
nobody knows for sure except the designer.....