ive had the same prob i found the horn to have failed. as u look in the engine bay from the front the horn is on right hand side. theres a conector on it. remove the spring clip get someone to press the horn whilst you use a multimeter to check theres power to that point if there is then the horn is at fault. but i have fitted a air horn to mine using the standard feeds just uprated the fuse. hope this helps. if you need more help email me any time. saxorallyteam@fsmail.net
ben williams
February 2007