Vansco 7651-67486-00 Multiplex Module

The Vansco 7651‑67486‑00 Multiplex Module is an industrial vehicle control unit that centralizes input/output communication between multiple subsystems (engine, HVAC, lighting, etc.). Common failure points in this class of modules include power supply degradation, solder joint fatigue on the high‑current I/O traces, and firmware corruption leading to lost channel assignments. Begin troubleshooting by verifying the 12 V/24 V rail voltage and ensuring proper ground reference; inspect for burn marks or loose connectors on the I/O headers; then review any diagnostic codes from the vehicle’s ECU or the module’s built‑in self‑test routine before proceeding with firmware reflash if necessary.[oss-gpt-20b]

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We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.

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