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These are about the same schematics that all-data has as they both pull data from factory publications. I recommend all-data because of the ease of use and the speed you can find exactly what you’re looking for.Automotive Wiring Diagram Instructions

Abbreviated codes on the diagrams provide circuit path and part or component information. The codes or labels may be used to show circuit connector pin numbers, circuit values or component polarities that will add clarity to the diagnostic drawing. These sets of label examples are:

(1)A for Amperage or Amps. (2) ORN for wire diameter and color (3)1340 for Circuit Path ID (4)P for pass through grommet (5)A for Pin ID & Location (6)C1 for Terminal Connector ID (7)B+ for battery positive Automotive Wiring Diagram Instructions

Note that the switch symbol displays an open or closed circuit path, which is what an actual switch performs. The battery symbol appears to be made of layers or plates, common to internal battery construction.Automotive Wiring Diagram Instructions

The resistor symbol appears to impede energy flow, which is a resistor function. The case ground symbol indicates a connection pointing downward (ground) that dissipates energy.