Temporary/Permament fix to Air Suspension Problem

[clsimmon]

After about 30 miles after just replacing my air springs my 2003 has all of a sudden lost all air in the suspension and is currently sitting on the bump stops. Service Suspension light came on, but I can't get it to show any longer. I don't have any codes in DTC which seems strange; even in history.

Compressor runs non-stop, and with the engine running tailgate open, I get good pressure from the schrader valve in the cargo compartment when I enable the compressor switch. So, it appears the compressor is doing its job, but why wouldn't the air bags inflate?

I thought about hooking an external compressor up to the cargo outlet to help me troubleshoot finding the leak, but i'm concerned I will blow a 1-way pressure valve doing something like that.

Is it a common airline from schrader valve in the cargo area to suspension springs, or does the cargo area have it's own line, and the suspension springs have their own lines and control?

If it was a common airline, wouldn't that be a bad design, because airing a tire up, would in fact deflate the suspension; correct? They must be on separate lines. Any ideas why I have good pressure in the cargo area, but not in the air springs? Any ideas on troubleshooting? I don't hear air leaking anywhere.

Thanks!

[Easy Ed]

Check the lines with soapy water. I am thinking you have a leak that goes to one or the other air bag or the line was not attached to one of the air bags correctly and came loose so soon after being replaced.

Good Luck, Ed

P.S. I tried to look at one of my old pics to see what the junction block looked like but it was not a good pic of it :-(

Someone on here, jsbihn has my old service manuals maybe he can look up the line routing for you if he sees this post ;-)

Or, HUMTECH can answer your question, knows his sh!t about the H2's.

[HummerJim]

Ed, good to hear from you! I have an old thread in here somewhere when my 2006 SUT settled down on the stops. I took it back to Lynch and they replaced the compressor only under warranty and everything was fine for 7 years, except the switch in the bed for inflatables stopped working eventually and I had to replace it myself.

[Easy Ed]

Originally Posted by HummerJim

Ed, good to hear from you! I have an old thread in here somewhere when my 2006 SUT settled down on the stops. I took it back to Lynch and they replaced the compressor only under warranty and everything was fine for 7 years, except the switch in the bed for inflatables stopped working eventually and I had to replace it myself.

[HummerJim]

170,000 miles and the air suspension is doing great. I love it! I spray Armor All on the bags and lines a few times a year after I hose the underside and let it dry.