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Front suspension will not air up. Compressor comes on when vehicle is started and cuts off in about 10 seconds. New compressor,relay, air springs and compressor valve block. The only thing left is the control module. i have no air leaks and a lot of frustration. The air lift button on the dash lights up but will not turn on the compressor. Is there any way to ck the module. Can't find any troubleshooting info on this. Only code that comes up is C1517 ...
