I had the same problem with my 2000 Windstar. It ended up being a brake fluid leak around a sensor on the master cylinder. The sensor is a known issue and has been redesigned. The brake fluid dripped onto some elctrical connections causing fuses to blow. The sensor turns off the cruise control when the brakes are pressed. On some vehicles it was known to cause fires and Ford had to provide a recall. At the time my Windstar was not covered in the recall but it may be now.
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Tuesday, July 22nd, 2008 AT 10:16 PM