what is the most common problem with cruise control?

Get another Professional to scan the system then post the results (code numbers) here and us mere mechanics can be more helpful. Vehicle speed sensor is a definite possibility, but code numbers is what we need!

poss on a recall ford installed a new wire hareness for the cruize control shut down switch on master cyl. the also installed a fuse in the updated harenesss ck that.switch is located on master cyl in the very frt