My Cruise Control wasn't working so from information gathered on this forum I checked the vacuum lines and made sure the brake light switch was operational. It still didn't work after that so I checked the fuse. The fuse was good but I still didn't have working Cruise Control. Come to find out there is more than one fuse that the Cruise Control uses. Thanks to a wiring diagram I found which fuse was bad and fixed my Cruise (and Horn that I didn't know was out).

So, for future reference, the following fuses should be checked when your Cruise isn't working.

Passenger Cabin Fuse Panel:

Fuse #30: 20 amp
Fuse #25: 15 amp

Engine Compartment Fuse Panel:

Fuse #16: 10 amp

Not a traditional fuse but listed in the diagram:
Link #8: 50 amp

 

Yea, every now and then my horn fuse will blow and takes out the cruise.

 

You will also find the horn relay dies at some time or another but there is an unused replacement in the under hood fuse box provided you haven't got ACE fitted as that is the replacement.

The relays are available for $10-15 each and fit many vehicles.