Alternator voltage

Probably means the battery disconnect. He could be english, they call things like that valves.

 

I don't believe I have one installed. I'll have to look a little closer when I get another chance.

 

Ya, this 2012 cascadia was the first truck I've ever seen one on. I drove a 2016 KW and it didn't have one.

 

I have a 94 so I doubt I have one from KW.

 

Pass-thru valve: on the firewall next to the steering shaft. Junction point for all the air hoses and harnesses going into the cab. Two smaller gauge battery cables that feed all the power inside the cab (including the dash/gauges).

The cable on the alternator goes to the starter and ties in with the cables going to the pass-thru and the batteries.