Cruise control not working, 2.5 automatic

[98cirrus]

My Cruize control hasn't worked since 60,000 miles. Car now has 94,000 miles on it. Actually, the cruize would work sometimes but not others. Now not at all. If I turn the cruize control on, it simply automatically turns itself off shortly after, regardless if I try to set a speed or not.
There is plenty of vacumm to the servo unit. I am wondering if the output speed sensor needs to be replaced or cleaned. However, speedometer, shifting, odometer and such function perfectly & always have.
Any ideas on what the problem may be?

[eleyebee]

On my 95 Sebring the brake light switch malfunctioned. The brake lights
would still work intermittantly. My cruise control acted the sme way. When I replace the switch, the cruise resumed working. Hope this helps.

[mikehu]

Which switch did you replace? You don't mean that replacing the brake light switch fixed the cruise control, do you?

[legalfee]

The brake light switch (on the pedal) is actually 3 switches in one. One switch is for the brake light and the other 2 for cruise control.