I had the very same issue happen, the ait suspension blem the pas air ride bag, then the compressor, but also the circuit control box the starts and stops the air ride compressor to run, so that will suck the money out of your wallet, I had the indy take out the drain plug and no troubles since, my recom, is to leave that plug out mine was almost half way up to the spare tire, so it was overfull, and I dont know where it was entering the back but no more since !!!!