Identify the power source
Find the ground connection
Read the diagram legend and symbols
Trace the circuit path from source to load
Follow wires by color and label
Check component connections and terminals
Note switches, relays, fuses, and breakers
Compare wire junctions and splice points
Distinguish between series and parallel paths
Verify connector pin numbers and locations
Use the diagram title and sheet references
Cross-reference related pages or sections
Check for wire gauge and circuit ratings
Match the diagram to the actual device or system
Trace the flow of current step by step