Hi. I have a Bosch FD6D 5 24 horn on my Augusta, looks like it's original and it used to work reasonably well. It stopped working just before I decided to take the car for an MOT. I have stripped it and cleaned what I can. The electrical circuit is ok (about 1.6ohms) by carefully turning the adjusting screw on the back I can get a half hearted vibration but not a good hoot over about 1/2 a turn in the adjusting range. Does anyone have any info or ideas. Thanks. Dale
