CECU cruise control rationality check

[Rawze]

== Maybe disconnect batteries for 30 minutes to force reset the cab controller?. - Paccar chassis controllers in general are known to need a hard reset once in a while to solve ghost issues.

== Check all fuses in the fuse panel for discolored fuse blades (even though they might still be good) and replace any that are not shiny new looking?. - Tarnished fuses will often cause a few tenths voltage drop on the cab controller or other devices and cause them to act up as a truck gets older.