Aslong as you put it back before you turn the ignition on, there will be no ill effects....you can't leave it out indefinatly, as the EAS will log a fault when you turn the car on!Would pulling that relay and leaving it out cause any probs?
My drive is very uneven (slopes down forward and to the right)and most mornings its flat down! Dont think its a leak cos my last rangie did it too