Folks, My 'new' 1993 facelift XJS 4.0 has an intermittent problem with the electric seat adjustment. Every now and again, the driver's seat motors it's way back for some reason... ...and now, the seat adjust buttons don't work to bring the seat forwards again... ...and also (!) I found that the seat motor kept trying to engage ("click clunk, click clunk...") all the time, draining the battery. Apart from that, it's fine! Any thoughts on what may be amiss? I found an old quote from a previous owner, for a garage to investigate a similar problem. They were suggesting stripping back the door panel to check the seat adjust buttons for moisture - the fact it's still doing this suggests it wasn't entirely successful.