Nuvatec 84‑00069‑003 is a remote battery disconnect panel used to isolate vehicle or motorhome batteries while preventing disconnection during engine operation via an ignition interlock. Common failure modes for this class of panels include burnt relay contacts, failed indicator LEDs, corroded or broken wiring harnesses, and blown fuses that interrupt the control circuit. Begin diagnostics by verifying power supply voltage at the panel input, inspecting the status LEDs for proper illumination, checking the relay contact resistance and continuity, and reviewing any error codes logged in the associated controller. If all electrical checks are nominal, perform a visual inspection of the wiring harness for signs of wear or damage before proceeding with component replacement.[oss-gpt-20b]