Driving down the road the cruise will shut off. When it does the radio/clock will quit, and while clock is off power door locks will not work. Took it in and shop replaced the fuse block and they sent the dash to have it checked Didn't do any good
Any thoughts what to look at next

 

I would check the switch for the brake pedal and the wiring for it. If the switch is bad or the wiring has rubbed through, you might have an intermittent short. That would turn off the cruise, and possibly screw up power in the cab [at least for a short time].

 

Key items to check:

1) clock spring.
2) grounding at brake-switch cut-off for cruise
3) master cylinder cruise control cut-off switch