2002 Disco II door lock problem
 

I have a 2002 Disco II SE. Door locks were working properly when I lent my vehicle to a friend. When he brought it back he said that he could not get some of the locks to open with the remote entry. So now, only the rear driver door and the back gate door will open/close with the keyless remote, the other 3 door locks will not open/close with the remote. Is there a lock relay to check? Also, I do not have an owners manual, can someone tell me where I can find a listing showing the fuses/relays and their description.?