I wonder if any one can help, the cruise control works when it wents, sometimes it works for a couple of miles then switches off. When you ressume it feels like it pulses as if trying to work and may take 6 or 7 attempts to ressume properly but doesn't last long before stopping again. Sometimes while trying to set the cruise it does the same, pulses like its trying to work but wont set. Any clues??? Thanks in advance.