Range rover classic suspension

My mate has just phoned me and said he has just bought an L reg range. I pressume this is a range classic. He said the suspension is down and won't go up. I will know more tomorrow but can anyone suggest where to start and is it the same system as the p38.
thanks jim

If it is not an air leak, there are at least 3 fuse that rum the electrical side of the suspension. One is the 30amp pump fuse, should be under the drives seat.
these is also a 15amp fuse the powers the time delay relay and the the ECU.
the is one more the a 10amp this links the ing. to the Time delay relay. Good luck!

thanks for that. one of the rear air springs was not fitted right. jacked it up straightened it out air leak stopped and car went up