Hmmm... I'm also having frustrating BFM problems. I have a continuous BF message flashing in my XJ40 1988 display. It seems that only the *front* modules have the add on board that plugs into the other. The rear ones are much simpler. I too have tried to clear this BF "fault" without success but I haven't yet tried the nailfile trick, I must say. I also have a *new* problem which has started since fitting a replacement secondhand (right front) module to try and fix the BF message (which it didn't) Now if I blink right (or switch on hazards) the blinking *sound* is more rapid intermittently but the actual blink is OK. I'm concerned that this and the BF message may mask a *real* problem when I'm on the road, so would like to cure this. I also have a dummy "low windscreen washer" message I'd dearly like to clear, so that finally my fault display will be clear until I get a *real* fault. Of course, I'd like to do this all yesterday so I'm ready for safe Cristmas trip (sigh).