All I'm saying is this: The company sees a wire going ANYWHERE and they're gonna go beserk! You know as well as I do that when they finally WANT to interpret something in the contract, they go nuts and go overboard! If these people are getting the PCM that no more radios allowed, PERIOD, then they have a grievance. I, for one, would not split hairs about a wire to a light or battery until it's resolved.
No, mine doesn't say anything, except Cobra 29, Panasonic AM/FM/CD/XM, the TV in the back just says JVC. Oh, it might be a little bigger truck than yours.
Yrs. ago, in feeders, there were no hookups allowed at all. Drivers would get fired for hooking, even temporarily, wires to the tractors power for "stealing power".