Josh,

I fixed mine.  The vacuum tube that runs from the vacuum pump in the engine compartment to the vacuum switch on the brake pedal wore a hole in itself.  The hole developed where the tube runs through the firewall.  The tube chaffed itself until a hole developed.  Without vacuum, the otherwise properly operating cruise control did not work.  I replaced the tube in its entirety, but I could have wrapped the bad spot with duct tape.  Really, seriously, duct tape.

Hope that this helps.  Let the list know.

Dennis Lockwood
91 Carat
Original Owner