Introduction / Context:
Clear terminal identification prevents wiring errors, polarity reversals, and damage during assembly or maintenance. Documentation should show how colors, symbols, or pin numbers map to physical connectors and device leads.
Given Data / Assumptions:
- Components include connectors, polarized capacitors, diodes, batteries, or motors with specific lead designations.
- The diagram is used for build and service.
- Technicians may not have access to separate vendor datasheets on the bench.
Concept / Approach:
Including terminal identifiers directly on the diagram or in a clear note minimizes ambiguity. For example, indicating pin 1, anode/cathode, positive/negative, or color codes (e.g., red, black, green) helps ensure correct wiring and troubleshooting.
Step-by-Step Solution:
Annotate connector symbols with pin numbers and signal names.Indicate polarity and orientation markers (e.g., +, −, dot for pin 1).If color codes apply, include a legend mapping colors to functions.Cross-reference to the BOM and, when necessary, to vendor part drawings.
Verification / Alternative check:
Perform a dry run: could a technician wire the harness correctly using only the diagram? If yes, identification is adequate.
Why Other Options Are Wrong:
Incorrect: Omitting identifiers promotes errors and rework.Only needed for AC mains / Not required if BOM exists: Many DC and signal circuits need clear terminal IDs; a BOM does not replace on-diagram clarity.
Common Pitfalls:
Leaving color codes in a separate document not accessible at the bench.Failing to update diagrams when connector pinouts change.
Final Answer:
Correct
Discussion & Comments