I have a 2000 bow x5 4.4i the rear air suspension is all the way down.

Hello Alex! And thanks for your answer, I checked the switches and they both look ok, not bent or broken, and again if I open the door for the first time the pump activates but only for a second or two, or if i move the ignition switch to on, the pump activets 1 second only. Is there anything else that prevents the pump to activate? Some safey switch? That you may know? Thank you

Hello and thank for your comment or advice. I did checked everything you told me, the switches, connections, relays, fuse I jack up the vehicle and it did the same, I even change the bags thinking they were torn, but it wasn't the problem. I decided to inflate the bags by bypassing the relay, the pump work but the bags never inflated, so I disconnect one of the air hoses (the blue one) I add dish soap to the end then I turned the pump on, and my big surprise, no air coming out of the pump, the pump is damage. So I was thinking id doing the spring conversion because the pump is too expensive, however I found a pump repair kit on eBay for like about 46 bucks, and I am waiting for the parts to arrive, after I do the pump rebuild I will post to see how everything came out.