2003 W900 Cab swap

I've never had to convert a multiplexed KW cab back to old school. I would imagine you'd pretty much have to gut the dash and re-wire from scratch with new gauges. Although I seem to recall reading an older thread that @Guntoter may have done that conversion recently.

 

When it works, it works good. But 1 broken wire in the 2 wire backbone, failed terminating resistor or a short to power and you could essentially cripple the truck. Its not a fun system to troubleshoot TBH.

 

Very few things in the cab need to be changed. I needed a new TPS... A few little things like that, no big deal. You definitely DO NOT have to "gut the dash".

 

You do know KW will be able to answer your questions for you because they deal with some of the issues you are wondering about. You can start with their upfitters manual, it may be on line, it will break down the systems on the trucks and what model has what modules.

 

I am 90 percent sure kenworth didn't do multiplexing until 2010. Call the dealer Monday morning and verify though. But the answer to your question on plugging the 6nz to the newer cab yes it is that simple as long as it is a cat equipped cab.