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1996 Sedan DeVille
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Discussion Starter #1
Hi: Haven't posted in awhile, however I have a quick question about the rear air suspension. The car used to be completely level when I purchased it last year, however it seems to be sagging a little in the rear. I had the key on, engine off the other day, and loaded something in the trunk, and heard a buzzing noise from the rear, as I think the air ride motor/pump was trying to inflate the rear shocks, however it didn't sound too good, and went off after about 15 seconds, and didn't raise the rear end up. I have the factory service manual, however I always like to post here to see if there are common problems/quick solutions for these issues, i.e. a relay, control module, etc. Also, if it is a certain part, sometimes forum members may have an extra used one they are willing to sell, to avoid paying the high $$$$ that the dealer charges. Any help or suggestions are welcomed, as the factory manual appears to require special tools to diagnose this situation........
 

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White Diamond '03 DHS (with DTS floor shift)
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Chris,
Sounds like the compressor is working fine. I'd get under it and look at the air lines. You may find one broken or chaffed. If you can't find a leak, spray all the fittings with soapy water when the compressor is running.
 

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2005 Deville
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244 Posts
Every time the car is started, the rear air suspension does a 'self check'. The compressor comes on and raises the car a little, then it exhausts air to lower it to the correct height. That is what you are hearing.

To check this, just turn the key to 'Run' and wait a few seconds. You will then hear this check.
 

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1995 SEDAN DEVILLE-4.9 & 1978 SEDAN DEVILLE-425
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1,673 Posts
Mr

Hi: Haven't posted in awhile, however I have a quick question about the rear air suspension. The car used to be completely level when I purchased it last year, however it seems to be sagging a little in the rear. I had the key on, engine off the other day, and loaded something in the trunk, and heard a buzzing noise from the rear, as I think the air ride motor/pump was trying to inflate the rear shocks, however it didn't sound too good, and went off after about 15 seconds, and didn't raise the rear end up. I have the factory service manual, however I always like to post here to see if there are common problems/quick solutions for these issues, i.e. a relay, control module, etc. Also, if it is a certain part, sometimes forum members may have an extra used one they are willing to sell, to avoid paying the high $$$$ that the dealer charges. Any help or suggestions are welcomed, as the factory manual appears to require special tools to diagnose this situation........
I had the same problem with my '95 Deville last August.Long story short,one of my air shocks was leaking oil.Dealer wanted $2800 to replace both rear air shocks-----way too pricey for me so i ordered rear passive shocks from Suncore industries and had them installed.The ride feels the same as when the air shocks were in and the ride height is exactly the same also.
Maintaining the air ride on Cadillacs is a pricey one.It`s good to know there is a much less expensive option when things wear out.
 

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1996 Sedan DeVille
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22 Posts
Discussion Starter #5
Thanks for the info guys; I'm not sure the compressor is working at this point; I heard it during the summer, however it sounded like a sick duck, and I don't recall hearing it with the key on, engine off. In the MaxiFuse/Relay Center under the hood, is the compressor controlled by the Body 1 maxifuse? I might as well check the easy stuff first. If I find a big $$$ repair, it will stay as is, as who the heck needs to deal with that $2,800 BS.........

Thanks, Chris.
 

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1996 Sedan DeVille
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1995 SEDAN DEVILLE-4.9 & 1978 SEDAN DEVILLE-425
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1,673 Posts
Mr


The new compressor from Arnott inc. looks like a winner to me.I was originally thinking of getting replacement air shocks from Arnott inc. after mine began leaking---but once one part or the air ride needs repair,other parts needing repair will soon follow,especially on a 12-13 year old vehicle---adding up to major bucks.So i decided to bypass the original air ride completely and as i mentioned before, installed the rear passive shocks.
If you want to know the real problem with your rear air ride,simply take your Caddy to a repair shop you trust and have a mechanic check the rear air compressor,air lines,rear shocks and electrical connections.I always stand with the mechanic and watch everything he inspects.
 

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99 Deville Concours
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46 Posts
I recently bought air shocks from Arnott and they are working great. maybe a little stiffer than original like others have said, but definetely better than the blown ones that were on there. Arnott seems to be a reputable company, and would def not buy that used one for the same price. They sell a lot of air suspension parts for all vehicles and seem to know what they are doing.
 

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have a 97 deville concours and had the same problem...........go to arnottindustries.com or do a goggle search with that name......i bought 2 brand new air electronic shocks brand new for dirt cheap......then have a local garage install them as i did............the airbags in the shocks are what go bad...........very, very, happy with the result..........you won't be disappointed when you buy them........i think they are out of cape canaveral, florida or somewhere like that.........
 

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1976 Cadillac Fleetwood Brougham and 1996 DeVille
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121 Posts
After reverting to passive system, how did You "silence" the annoying message: "Service Ride Control" ?
I just bought a 1996 DeVille and the previous owner did change the shocks to plain simple passive system, but didn't bother to do anything about the error message, that keeps on coming on the dashdisplay "Service Ride Control".

Any ideas?

Thanks in advance...
 

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99 Deville Concours
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46 Posts
Pretty simple if you're comfortable doing a little minor wiring. Go to suncoreindustries.com and buy the resistors for your car $6.50 per wheel. Remove your front wheels, you may have to take the front wheel well piece off to find the two wire plug that your oem struts used to plug into. Cut the plug off and connect one wire to each end of the resistor. The plugs for each rear wheel should be pretty simple to find as well. Clear out your error codes from the computer and you're done. I'm basing all this on my 99 Deville Concours, but looking at the parts @ suncore I doubt its any different. I bought my passive kit for the front wheels from Strutmasters.com, and was never able to get the error messages to go away like they claimed (lousy customer service too). I then bought the resistors from suncore and fixed it in 20 minutes.
 

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1995 SEDAN DEVILLE-4.9 & 1978 SEDAN DEVILLE-425
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1,673 Posts
After reverting to passive system, how did You "silence" the annoying message: "Service Ride Control" ?
I just bought a 1996 DeVille and the previous owner did change the shocks to plain simple passive system, but didn't bother to do anything about the error message, that keeps on coming on the dashdisplay "Service Ride Control".

Any ideas?

Thanks in advance...
When i bought my passives from SUNCOREINDUSTRIES.COM,they included the resistors to bypass the "service ride control".I never had any dash display messages at all after having mine installed.
 

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1976 Cadillac Fleetwood Brougham and 1996 DeVille
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121 Posts
Thanks, for the info! I will just do as You told!
I bought the car 2 weeks ago, and the previous owner did the swap to the passive system without taking care of the message.
As soon as I am done I will let You know how I managed it.

Thanks again! :thumbsup:
 

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99 Deville Concours
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46 Posts
If you havent already, try just resetting the codes first. If he did indeed buy the passive struts, they may have come with the resistors. He might not have known how to reset the computer. Could it possibly be that simple, I know it never is for me. Other wise just install those resistors as I described.
 

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1976 Cadillac Fleetwood Brougham and 1996 DeVille
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121 Posts
I bought the 4 resistors in a local shop here, had no time to raise the car yet. I have however no description/manual to the reesistors, just the resistors themselves. So please tell me if I didn't understand correctly: There should be a two wire connector, I should close the circuit with the resistor. Is that correct?
BTW i erased the message, but it keeps coming back, so there is definitively a resistor issue.
 

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99 Deville Concours
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46 Posts
Yep, thats it. I actually cut the harness off the old struts/shocks and wired in to that so I could just plug them in, but thats prob not an option for you. Good Luck, sounds like you know what you're doing.
 

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1976 Cadillac Fleetwood Brougham and 1996 DeVille
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Ok, I raised the car today and it tuns out that the resistors were already attached to the wires, but I cut them and replaced them with the new resistors. The "old" resistors were 16 Ohms, the new are 10 Ohms. I erased the error codes from the computer but they are returning. And they are the same then before:
RSS0011
RSS0016
RSS0021
RSS0026
which means: Left/right/front/rear (so basically all 4) solenoid short to GND.

What should I do?
 

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99 Deville Concours
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46 Posts
Check the fuses, mine was on back of rear seat accessible from trunk. on my car it was the incorrect resistor in the strutmaster struts that were blowing the fuse sending the code. Possibly the relay, behind cushion of rear seat. beyond that, my novice skills run out.
 

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1976 Cadillac Fleetwood Brougham and 1996 DeVille
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121 Posts
Ok I checked the fuses, they are OK.
This "short to GND" must mean something, did I do it correctly by connecting each end of the wires to the resistors different ends?
 
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