WIRING DIAGRAMS
TYPES OF WIRING DIAGRAMS ENTIRE VEHICLE SINGLE CIRCUIT OR SYSTEM SCHEMATICS HARNESS (ROUTING) DIAGRAMS COMPONENT LOCATORS
BLOCK DIAGRAMS GRID DIAGRAMS SCHEMATICS
WIRING DIAGRAMS IDENTIFIES WIRES , CONNECTORS AND COMPONENTS SHOWS POWER DISTRIBUTIION SHOWS GROUND DISTRIBUTION SHOWS ENTIRE CIRCUIT OR SINGLE CIRCUIT SHOWS DETAILED INFORMATION PRINTED CIRCUIT BOARDS
ELECTRICAL SYMBOLS Symbols represent actual components Sometimes shows basic operation “Legend” interprets the symbols Some show actual drawing of component
COLOR CODES AND CIRCUIT NUMBERING wire/circuit identification Wire marking, tags, color, tracers Standarized color code SAE or Manu. Diagram circuit numbering Wire gauge
COMPONENT LOCATORS Factory service manuals Aftermarket manuals Harness Views Component views connector views
TROUBLESHOOTING Must use logic consistent method Parts of circuit