I was hoping someone would know how to diagnose if I have a bad compressor, relay or what with the air suspension on my van. Fuse box checks out ok. The little solenoid in the rear for the accessory air clicks on and off with the switch. Is there an independant shut off for the compressor?

Also, coincidentally the rear windows are power and don't seem to work either. Don't know if this is related to the compressor not EVER running but was hoping someone would have a clue.

Bought the van used and didn't notice at the time if either of these functioned. : (

Also, how critical is the air suspension? Other than a bumpy ride are there safety concerns?

Thanks!

Sounds like maybe a bad shared ground.
You would need to check both window motors and at the compressor for power and ground. If both good, the units will be bad. More likely, you will find something missing, like no power to one. The important thing is finding out what these units share that would make them all stop working. I have never seen the rear window motors ever go bad.
Air suspension is basically air shocks used for load leveling. Normal suspension will still work fine.

I was hoping someone would know how to diagnose if I have a bad compressor, relay or what with the air suspension on my van. Fuse box checks out ok. The little solenoid in the rear for the accessory air clicks on and off with the switch. Is there an independant shut off for the compressor?

Also, coincidentally the rear windows are power and don't seem to work either. Don't know if this is related to the compressor not EVER running but was hoping someone would have a clue.

Bought the van used and didn't notice at the time if either of these functioned. : (

Also, how critical is the air suspension? Other than a bumpy ride are there safety concerns?

Thanks!
Well, for the compresor, go to to a pro, the rear power windows, I can tell you that, my rear left power window started to go bad 6 month ago, and that my rh rear window went bad yesterday, only fix is to buy new.
this car has allot of bad electrical probs, but I like it anyway.
Cheers
Larry

Well, for the compresor, go to to a pro, the rear power windows, I can tell you that, my rear left power window started to go bad 6 month ago, and that my rh rear window went bad yesterday, only fix is to buy new.
this car has allot of bad electrical probs, but I like it anyway.
Cheers
Larry
Larry,

You MAY be able to get replacement rear power motors on eBay at a VERY reasonable cost (that's what I did - about $30 for both sides). The motors I got were used, but they seem to work fine. You can read the full story at the link below.

Installing Power Rear-Quarter Vent Window Motors (http://www.my-chevy-venture.com/power-rear-quarter-vent-window-motors.html)

Take Care,