Hi Mike, The brake and clutch switches are just simple normally open/closed switches. If either is pressed then cruise control will disengage, should be easy to check with a simple meter. Most problems on the petrol engines seem to be related to the vacuum pipes. see here http://www.fordgalaxy.org.uk/ford/index.php?showtopic=7897 Also do a search on the forum for cruise control there is lots of info especially relating to the petrol variants. Ignore the references to the diesel as their cruise control is very much simpler.