1997 Jaguar XJ6

I made a donation last week when asking the question about my transmission light going on and the car going into "limp home mode" -- but --later --self correcting and now running fine. Fear of it happening again. I received a brief reply and a fax. I was told I would receive further infor to clairify the fax infor. (Electrical diagrams) I haven't receved any more info. Do I take the diagrams to a mechanic and ask him to check the relays? Help please. Need a little more help as to what to do with the fax info and based on previous info-- is the problem in the electrical system relays? Intermittened prob with windshield wipper, streering collumn, seat adjustment, off and on at times. Hope to hear from you Mr Weizler. Sp?