you can do it one at a time, use a 12 volt power source and 2 wires with gator clips, unplug all 4 harness's and air lines going to each solenoid, hook the 12 volt power to a solenoid and use a home compressor and air gun to shoot air into the bag after you hear a click when you put power to the solenoid, once you have put a bunch of air in, unhook the power and move to the next one, but, if your car is down low and you cant drive it the way it is, adding air to the bags is a waste if your car has a leak, which is most likely why your compressor doesnt work, from trying to keep up with leaky bags. if you just need to move the car around, jack it up and put a piece of 2x4 on the top of all the upper control arms, front and back, this will aloow the car to be moved without draggin on the ground.