My air suspension was riding a little low on the passenger. I tried to put the car in 4 wheel drive and the car dropped all the way down, I check the air suspension relay and it was good. I have power and ground at the relay. Can I disconnect the compressor and manually apply power. Also I read a little about bad o rings and fittings and was wondering where they were all located. I'm sure this is a exhausted subject, can anyone show me a write up on a DIY diagnoses? Thanks