engine brake and cruise not working

make sure the clutch pedal is all the way out.

from time to time the actual C-switch will go bad.

 

yes, and I think from memory they r the same fuse.

 

yes, and I think from memory they r the same circuit breaker

 

jakes and cruise not working on smart wheel 1999 kw 900l

 

cant offer you much help, but...
A friend with Peterbilt had to add alittle stronger clutch pedal return spring. A long shot, i am sure, but apparently it does happen?

Opps, little editing here. On more careful reading of thread, Bigray has already nailed this in #2. My apology's.

 

make sure your grounded steering wheel to steering colum, and that your making contact to sensors (right side bottom by the johnson bar.

 

the clutch circuit is run off of a common wire ( ground) Same with almost all kenworth switchs!!! if the pin out from the ecm is ok then that circuit should not be the issue.. it would be best to have cummins insite hooked up and monitor all of your switch inputs..

Brake ,throttle, clutch & switch inputs all come into play here.. it should be a failrly straight fwd diagnostic with a computer hooked up..

does the unit have a smartwheel?

 

Is there suppose to be a hot wire going to the smart wheel