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Did you check resistence between relay connector and ground to verify that relay is good?
Make sure the air ride switch is turned on in the trunk compartment. Next, you will need to check the wiring for opens/shorts. You will need a DVOM(digital voltmeter) in order to test wiring. There is also the possibility of faulty air suspension switch(located in trunk compartment on left hand side) or a faulty ASCM(air suspension control module)(located behind right side of dash-remove lower instrument panel sound insulator below glove box to access ASCM)
Here are tests that you will need to perform in order to properly diagnose and correct problem:
Here is wiring diagram to help out with above tests(in 3 parts so you can read it better):
You really need to do the above tests. Although it might be the switch or the ASCM, just swapping out the parts, you are taking a chance on wasting money needlessly. It could just as easily be a short/open in the wiring.
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