Strange cruise control problem

Everything on my cruise control works, except "resume." I thought something might be wrong with the clock spring, but "accelerate" works, which is the same switch position as "resume." Has anyone else run into this problem?

 

Don't know if this helps, but mine will reset if the truck goes under 30mph and will no longer remember what speed I had it set at. Highly annoying, but I just thought it was normal for these. My 2nd gen truck didn't do this but this one does and I've never really looked into it much. Assuming yours does it no matter the speed?

 

I've only used it at highway speeds. Don't know if it will reset at lower speeds.

 

I found out that this is what mine is doing. If I don't slow down too much the resume still works. I haven't played around with it to figure out what speed it resets at.