📌 RV Multiplex & Advanced Electronics megathread

This one's for the deeper electrical/electronics stuff -- multiplex wiring systems, Victron integration, inverter/charger configuration, CAN-bus weirdness. The full writeup with system-specific notes is at unitedmobilerv.com/tech/. If you're troubleshooting something specific on your rig, post your system (brand/model) and what you're seeing -- if it needs a meter on it in person, Full pricing and the diagnostic fee structure are at unitedmobilerv.com/pricing/.