2010 proster no cruze wiper or Jake activation

[MRETRANS]

Yes sir we did plug-in to the body control module we re-flashed it on the truck at the the International Dealer and then tried to diagnose where it was coming from but no codes or failed operation going through those it’s just not showing up on the computer according to the computer everything is fine they gave me a diagram of the smart wheel but the turn selector lever runs the wipers the two control panels on the smart wheel right side for engine brake air horn and market light The engine brake only does not seem to work
On the left side headlights cruise resume and cancel on and off the marker light interrupt is the only one that works.
On the turn selector lever would be the wiper wash and the wiper etc. the turn selectors right and left work but can’t get a response out of the wiper functions and wash function
that’s the thing I took it twice to the International to have them flash the Body control module and run test but the computer does not pick up the problem