Compressor sound coming from the back at startup- what on the air ride has blown?
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  • 2 Post By '49 Ford Coupe
Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Compressor sound coming from the back at startup- what on the air ride has blown? in Cadillac Escalade Forums; It's been like this since we bought it at 89k, but the back rides fine and isn't sagging. Has the ...
  1. #1
    Sentinelist's Avatar
    Sentinelist is offline Cadillac Owners Fanatic
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    Compressor sound coming from the back at startup- what on the air ride has blown?

    It's been like this since we bought it at 89k, but the back rides fine and isn't sagging. Has the module gone bad? It seems to randomly come on at some startups.

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    EchoThreeSix's Avatar
    EchoThreeSix is offline Cadillac Owners Member
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    Isn't that just the compressor turning on/filling up at start up?
    I don't think that means anything is blown.

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    Sentinelist's Avatar
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    Is that what it does normally? Great news if so. Isn't terribly annoying- this is our first car with an air suspension.

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    EchoThreeSix's Avatar
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    I'm not 100%. But mine makes a sound everytime I start up as well. I asked the mechanic and he said that was just the compressor turning on and running its cycle. Unless he's lying to me for whatever reason.

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    BillysBowties is offline Cadillac Owners Member
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    I'm not sure if my compressor is airing up or not, I will deal with it later. I just bought it and my main concern is there anyway to clear the "service ride " code on the instrument cluster, it continually stays on and I can't even see my odometer readings. Thanks for any help you can give.

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    '49 Ford Coupe is offline Cadillac Owners Member
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    The compressor coming on at startup is normal. All that says is that either the back has a little more weight on it since it was turned off or you have a tiny leak on the system/shocks. If it stays on anymore than about 10 seconds you may have a leak that should be addressed. Get ready to rebuild it, as it seems they nearly all fail around 100,000 miles. When it does, get on line and buy the Arnott compressor/rebuild kit. It will only take you about an hour to take out the compressor, take the drier apart and put the new dessicant in it, bolt it back in and hit the road. I just did mine and it was waaay easier than I thought. The three bolts that hold the bracket on don't even have to be taken all the way off, just loosen them about a 1/4" and bang on the assembly and slide it out. Also take note of the hose/wiring routing, take a picture or something cause its a bit of a pain if you route the harness around the wrong way, as I did when I put it back together. Also the little airline comes off real easy, just unclip the connector and twist the wire retainer 90 degrees. Dont' loose that little snap wire thingy. I drove down the road without taking it off the connector, lost it, and had to fabricate another one out of a paper clip, but it worked well, anyway.
    EchoThreeSix and EchoThreeSix like this.

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    '49 Ford Coupe is offline Cadillac Owners Member
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    Oh, I forgot, when the compressor system fails, 99.9% of the time it's the bleed down solenoid, which gets water in it, and if you overload the solenoid, it will burn through the hair thin wires connect the solenoid. Caddy parts wants 500 bucks for a new assembly, and they do not sell the solenoid by itself. ask if any more questions. By the way there are other threads here that address all this. that's where I learned all I know about these things. THANKS GUYS ! !!

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    '49 Ford Coupe is offline Cadillac Owners Member
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    Oh, I forgot, when the compressor system fails, 99.9% of the time it's the bleed down solenoid, which gets water in it, and if you overload the solenoid, it will burn through the hair thin wires connect the solenoid. Caddy parts wants 500 bucks for a new assembly, and they do not sell the solenoid by itself. ask if any more questions. By the way there are other threads here that address all this. that's where I learned all I know about these things. THANKS GUYS ! !!

  10. #9
    the cadillac man's Avatar
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    Quote Originally Posted by '49 Ford Coupe
    Oh, I forgot, when the compressor system fails, 99.9% of the time it's the bleed down solenoid, which gets water in it, and if you overload the solenoid, it will burn through the hair thin wires connect the solenoid. Caddy parts wants 500 bucks for a new assembly, and they do not sell the solenoid by itself. ask if any more questions. By the way there are other threads here that address all this. that's where I learned all I know about these things. THANKS GUYS ! !!
    Yep that is what causes the service ride control but I do suggest checking your shocks to be safe.

  11. #10
    Sentinelist's Avatar
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    Quote Originally Posted by '49 Ford Coupe View Post
    The compressor coming on at startup is normal. All that says is that either the back has a little more weight on it since it was turned off or you have a tiny leak on the system/shocks. If it stays on anymore than about 10 seconds you may have a leak that should be addressed. Get ready to rebuild it, as it seems they nearly all fail around 100,000 miles. When it does, get on line and buy the Arnott compressor/rebuild kit. It will only take you about an hour to take out the compressor, take the drier apart and put the new dessicant in it, bolt it back in and hit the road. I just did mine and it was waaay easier than I thought. The three bolts that hold the bracket on don't even have to be taken all the way off, just loosen them about a 1/4" and bang on the assembly and slide it out. Also take note of the hose/wiring routing, take a picture or something cause its a bit of a pain if you route the harness around the wrong way, as I did when I put it back together. Also the little airline comes off real easy, just unclip the connector and twist the wire retainer 90 degrees. Dont' loose that little snap wire thingy. I drove down the road without taking it off the connector, lost it, and had to fabricate another one out of a paper clip, but it worked well, anyway.
    Great info- I'll check it out more this weekend. Thanks!

  12. #11
    Sentinelist's Avatar
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    Yep, it stopped after 10-15 seconds on startup. Then a few people piled in, and it came and went again. I think I'm good, thanks!

  13. #12
    Sentinelist's Avatar
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    Re: Compressor sound coming from the back at startup- what on the air ride has blown?

    I jinxed myself.

    SERVICE RIDE CONTROL. My new greeting on the dashboard as of this evening... I'll start searching on here later this week or weekend but FYI here for now. Blarg.

  14. #13
    the cadillac man's Avatar
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    Quote Originally Posted by Sentinelist
    I jinxed myself.

    SERVICE RIDE CONTROL. My new greeting on the dashboard as of this evening... I'll start searching on here later this week or weekend but FYI here for now. Blarg.
    Spook to soon I know that feeling the only thing to do now is have the codes pulled but most likely the valve has took a crap,
    Meaning you will have to replace the compressor unless the codes state different.

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