From engineering detail to strategic issue
New: The Tech Navigator on automotive wire harness
Wiring harness is increasingly deciding whether new vehicle architectures function technically, scale economically and remain manageable in series production. Our Tech Navigator classifies why wiring harnesses, connector systems, power distribution and automation are becoming a strategic task for OEMs and suppliers.
Why does this matter now? Because the on-board electrical system is becoming the interface between digital vehicle architecture and industrial series reality - and thus places new demands on energy distribution, safety, standardisation and automation.
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Why is the classification worthwhile right now?
The wiring harness is currently becoming the decisive translator of the digital vehicle strategy into industrial reality: this is where software-defined vehicles, zonal architectures, 48-V systems, high voltage, eFuses and automatable wiring harnesses meet directly with the requirements of installation space, weight, safety and production.
Why the wiring harness is now becoming a matter for top management
For a long time, the wiring harness was regarded as a downstream implementation task. At the end of a vehicle concept, functions, control units and loads were translated into cables, connectors and protective sleeves. This logic is becoming less and less viable. Modern vehicles need a physical infrastructure that distributes energy, connects data and reliably supplies safety-relevant functions.
With software-defined vehicles, zonal E/E architectures and electrified powertrains, the wiring harness is moving into a new role. It is no longer just a connection level, but the touchstone for the entire vehicle architecture. What appears lean in the concept phase must later be assembled, tested, safeguarded and scaled across platforms. It is precisely there that it is decided whether a new architecture is also suitable for series production.
This shifts the discussion. It is no longer only about cable lengths and cross-sections. What becomes decisive is how early the wiring harness is integrated into platform strategy, energy architecture, interface planning and production logic. Those who make these decisions too late shift complexity into series production. Those who address them early create scope for standardisation, automation and robust vehicle platforms.
Which key questions does this Tech Navigator answer?
Why is the wiring harness becoming a bottleneck and at the same time an enabler of new vehicle architectures?
How are zonal architectures, central computers and modular connector systems changing the interfaces in the vehicle?
What role do 12 V, 48 V, high voltage, DC/DC converters and eFuses play in future energy architectures?
Why does automation in the wiring harness begin at the design stage and not only in manufacturing?
How are safety, freedom from interference, data quality and governance becoming central wiring harness topics?
From wiring harness to the connecting system level
The Tech Navigator shows why the wiring harness is becoming a strategic factor. It not only connects electrical loads, but also brings E/E architecture, software, production and safety closer together. This is precisely where the challenge lies: individual optimisations are no longer enough. A lighter material only helps if the connection technology remains stable. A modular connector only pays off if it is used across platforms. An electronic fuse only improves safety if its protection logic matches the architecture.
This becomes particularly visible at the interfaces. Zone controllers, central computers and electronic power distributors are intended to reduce complexity, but they create new requirements for contacting, wiring harness design and automability. Modular connector systems can reduce development effort and make variants more manageable. At the same time, they need clear governance so that standardisation does not become the next custom solution.
Energy distribution is also changing. From multiple voltage levels, electronic protection and diagnosable power distributors, an active energy system is emerging. Loads are not only supplied, but also measured, controlled and made usable for development. This increases the requirements for data quality, protection logic and responsibilities.
Vehicle electrical systems as an integration task for OEMs and suppliers
The thematic compass therefore does not classify vehicle electrical systems as a purely component-related issue. At its core, it is about integration. Architectural decisions, manufacturing processes and data models must be brought together earlier so that robust series solutions emerge from new E/E concepts.
This also affects automation. Wiring harnesses can only be automated economically if they are designed to be machine-grippable, testable and assemblable. Projects such as Next2OEM show how closely product design, process data and plant concepts are connected. The digital twin thus becomes the bridge between development and industrial implementation.
At the same time, the vehicle electrical system remains a physical system. Precisely for that reason, it shows very concretely whether digital vehicle strategies can be mastered industrially. If this thematic compass had to be condensed into one sentence, it would probably read: The vehicle electrical system translates vehicle architecture into industrial reality.
