Blog Detail

The Problem with Traditional Vehicle Wiring

In a conventionally wired vehicle, each function typically has its own dedicated circuit running back to a central fuse and relay box. As vehicles gain more electronic features, this creates several challenges:

• Weight: long, heavy wiring harnesses add weight that the vehicle carries on every trip.
• Complexity: more wires, connectors, fuses and relays mean more points where faults can occur.
• Difficult fault-finding: tracing a single failed connection through a large harness can take hours of workshop time.
• Slow changes: modifying or adding features often requires redesigning the harness itself.

What Is a Smart Power Management System?

A smart power management system replaces much of this point-to-point wiring with distributed, intelligent units placed in local zones around the vehicle. Each unit controls the power and functions in its own area and communicates with the others over a shared network. Instead of running a separate wire from the dashboard to every rear light, for example, a single communication line carries the instruction to a local unit, which switches the light on.

These units act as smart power and communication gateways. Along with power, they can manage audio, video, status and information functions across the vehicle.

How Vehicle Systems Communicate

For distributed units to work together, they need a common language. Commercial vehicles use established communication protocols for this, including CAN, LIN, J1939, Ethernet, RS485 and K Line. CAN and J1939 are widely used in buses and trucks, allowing engine, transmission, body and dashboard systems to share information reliably over a small number of wires.

Because every unit is on the same network, the system can also see what is happening across the vehicle in real time, which opens the door to smarter diagnostics.

The Benefits for OEMs and Fleet Operators

• Reduced wiring, fuses, relays and weight, which improves reliability.
• Lower development time and cost for vehicle makers when introducing new models or features.
• Built-in diagnostics across the chassis, body and dash, with alerts and automated corrective actions.
• Pre-maintenance features that help fleets catch problems before they cause breakdowns.
• Telematics connectivity that sends selected vehicle parameters to fleet managers at the back end.

Deva Autotronics’ Power Management Capability

Deva Autotronics designs distributed smart power and communication gateways for buses, commercial vehicles and off-road vehicles. The systems support CAN, LIN, Ethernet, J1939, RS485 and K Line communication, with Bluetooth, GPS, GSM and Wi-Fi as standard features.

The solutions are modular and scalable across multiple units of the same or different configurations, and support newer vehicle models and third-party sensors. Software is managed in-house, which allows fast management for different OEMs and vehicle platforms. More than 60,000 of these systems have been operating on Indian roads for over 15 years.

The Vision of Sushen Mohan Gupta Behind Deva’s Power Electronics

Deva’s work in power management reflects a long-standing focus on building vehicle electronics in India that are shaped by Indian operating conditions. Under the leadership of Sushen Mohan Gupta, Promoter and Managing Director of the Automotive Unit, Deva has developed its distributed power management solutions alongside its displays and cockpit systems, giving OEMs integrated electronic architecture from a single partner.

Looking Ahead

As buses and trucks add more connected features, the way power and data move through a vehicle will matter as much as the features themselves. Smart, distributed power management makes vehicles lighter, simpler to maintain and easier to upgrade. Guided by the vision of Sushen Mohan Gupta, Deva Autotronics continues to develop power management solutions for the next generation of India’s commercial vehicles.

To learn more about the electronics inside modern vehicles, read our guides What Is Autotronics? and Why Autotronics Matters for Commercial Vehicles.