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Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Answer the 1Million Question: Where is the air ride control relay located? in Cadillac Escalade Forums; Well, since this thread has been a wealth of a variety of issues with the air ride system, I guess ...
  1. #271
    Dax
    Dax is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    Well, since this thread has been a wealth of a variety of issues with the air ride system, I guess i'll give my story if it will help a few out there. I have an '04 with 103k on the dial and my compressor was running very often while driving and decided to replace the stock rear shockswith Arnotts Bilsteins. Granted, I didn't do a proper leak inspection with soapy water before replacing, I just relied on most people's experience with them going bad at around 100k. I replaced the shocks with no problem, hooked up the bypasses for the sensors and air lines. Now when the compressor kicks on, I get a hissing sound from what I believe is the right air hose connection. It doesn't leak so bad that the compressor never kicks off, but it does come right back on within about 30 seconds. I tried pressing on the connection when aired up, and the leak seems to be diminished, but is still there. I inspected the connector for dirt and cleaned very little out and the issue persists.

    So, now, I have a complete tubing set on order since I doubt the new Arnott's would have a leak. Has anyone had issues with the stock tubing connectors? In all honesty, it looks like a rather weak way to attach a high pressure connector. I will update this post or post an update once I get the new tubing on (all places had to special order it, so I don't think it's a 'fast mover'). Any help would be appreciated, and I think my loud compressor needs to go next!


    Dax

  2. #272
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    sk7
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    I agree on the "flimsyness" of the connectors, tho I've never seen one broken. Only those metal clips MIA. Keep us posted!

  3. #273
    Dax
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    Quote Originally Posted by sk7 View Post
    I agree on the "flimsyness" of the connectors, tho I've never seen one broken. Only those metal clips MIA. Keep us posted!
    Well, with time on my hands, and a stubborn attitude, I ended up swapping the shocks to see if the problem followed. I tried the soapy water test to see if it was genuinely the connector or otherwise, but since they are new, the water just rolled off and wouldn't stay adhered to any suspect areas. Sure enough, the leak followed the shock movement. So, i'm in contact with Arnott about an RMA. Updates to follow.

  4. #274
    Dax
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    Quote Originally Posted by Dax View Post
    Well, with time on my hands, and a stubborn attitude, I ended up swapping the shocks to see if the problem followed. I tried the soapy water test to see if it was genuinely the connector or otherwise, but since they are new, the water just rolled off and wouldn't stay adhered to any suspect areas. Sure enough, the leak followed the shock movement. So, i'm in contact with Arnott about an RMA. Updates to follow.
    Well, I hate to reply to my own reply, but it is leaking from the junction of the top of the shock/air bladder and the shaft. I didn't think of checking that area the first time. Anyway, seems like the problem should be solved after a little bit of wrenching and waiting.

  5. #275
    Dax
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    Problem solved... Replaced the defective shock and all is well. So if anyone needs a complete tubing set (GM P/N 88987900 unopened original packaging), just PM me.

    For the record, Arnott was very gracious throughout the warranty replacement. They just asked me for a picture of the leak (soapy water bubbles), and the replacement was on it's way. So, overall, a minor setback, but they never hesitated and made everything right.

  6. #276
    stock545i is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    Looks like this gremlin as struck my 02 EXT as well. I noticed compressor doesn't run at all and a slight sag on the right rear. I checked STUD1 and IGN3. There was no fuse in IGN3, is this ok, or was it taken out? I have located the relay and jumped 30 and 87, and haven't heard the compressor kick in.... to be continued..

  7. #277
    onaflyer is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    Quote Originally Posted by EXTodd View Post
    Thanks a lot ewill. Can you tell me how to remove the air lines from the shocks? Is it difficult? We can see that there is still air pressure in the shocks so why doesn't it deflate and sag the rear end if the exhaust solenoid is possibily open? Thanks for your help.
    Grasp the spring clip with a pair of pliers then twist and pull, then the connector will slide off. There is a good chance that you have an air leak on the shock bags since your compressor will not pump up the shocks. If so, that will lead to a quick failure of your pump from overheating. I had my pump rebuilt lately by Suncore of FL, and had to buy new shocks ($300. each, not GM) to make their warranty good.

  8. #278
    DanielKnew is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    ive gone over this thread and i couldnt find if anyone has uploaded a wire diagram for the plug on the compressor pump, i have a pump from an 2008 but the plugs are different from my 2003 and was thinking about hardwire the plugs right at the pump?

    if someone has answered this sorry to repeat it but any help would be great!

  9. #279
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    sk7
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    I think I did post the wiring for our model generation, I should have the newer version in the FSM. Will post in the next 24hrs!

  10. #280
    DanielKnew is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    also, someone has cut the little clear hoses, i think i would be correct if i said they go from the pump to the shocks some how?
    Im not to sure how many of those hoses there were to begin with or where they pluged into on the pump?
    Again im not sure if someone posted a diagram or picture but i could sure use one

  11. #281
    Enfuego74 is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    IMG00078-20110622-1124.jpg

    This is what the male end of my plug looks like. The corroded and eaten pin(middle right) is for the orange/red wire. I am assuming it is the positive. Which would explain why my compressor is not getting power. I contacted the dealer for the part and they told me that the housing is the only part they sell. Anyone know of an aftermarket replacement, OEM replacement, somewhere I can get it fixed or another made? Sorry for the poor Pic. I have a crappy camera phone.

  12. #282
    DanielKnew is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    from the picture you just uploaded how would i test my compressor from that plug, is there a diagram for the wires on that plug?

    could you take a picture of the little clear hoses on the pump, mine were cut off and im not to sure where they plug back in exactly.

  13. #283
    Enfuego74 is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    The pictue I up loaded is the male end. The wire that go to it come from the relay and the SCM(I think). I havent gotten iinto the SCM yet. I dont know exactly where the hose goes. Mine disappears into the wire bundle. It hooks up to the compressor with a metal clip and a 90 deg plastic fitting. I will try to take a better picture when I get home with a real camera.

  14. #284
    sk7's Avatar
    sk7
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    2008 Escalade Compressor Plug:

    ALC08 (Small).png

    Connector Part Information
    OEM: 15326654
    Service: 88986254
    Description: 8-Way F Metri-Pack 280 Series, Sealed (BK)

    Terminal Part Information
    Terminal/Tray: See Terminal Repair Kit
    Core/Insulation Crimp: See Terminal Repair Kit
    Release Tool/Test Probe: See Terminal Repair Kit


    Automatic Level Control (ALC) Compressor (Z55) Pin
    Wire
    Circuit
    Function

    A
    0.5 TN
    6075
    Automatic Level Control Pressure Sensor Signal

    B
    2 RD/WH
    2440
    Battery Positive Voltage

    C
    0.5 WH
    320
    Automatic Level Control Exhaust Solenoid Control

    D
    --
    --
    Not Used

    E
    3 L-BU
    2248
    Automatic Level Control Air Compressor Control

    F
    0.5 BN
    6077
    Low Reference

    G
    3 BK
    1750
    Ground

    H
    0.5 GY
    6076
    5-Volt Reference

    Our Generation Compressor plug:

    ALC04 (Small).png

    Connector Part Information
    • 12110751

    • 7-Way F Metri-Pack 280 Series (BLK)

    Pin
    Wire Color
    Circuit No.
    Function

    A
    LT BLU
    1112
    Damping Relay Coil Control

    B
    DK BLU
    2249
    Exhaust Solenoid Control

    C
    BLK
    407
    Low Reference

    D
    TAN
    2252
    Pressure Sensor Signal

    E
    GRY
    416
    5-Volt Reference

    F
    ORN
    2440
    Battery Positive Voltage

    G
    BLK
    1750
    Ground

  15. #285
    DanielKnew is offline Cadillac Owners Member
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    Re: Answer the 1Million Question: Where is the air ride control relay located?

    ok when i wired them together nothing happened.
    how would i test the pump to see if its working with a power supply or charger

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