Handbook 652 Body Electrical Diagnosis “How to Use This Manual” The system circuit diagrams display most of the information about the circuit using symbols, abbreviations, and color coding . To troubleshoot the circuit, you need to know how to read these symbols and codes. You will find a detailed explanation of the symbols and codes in the “ How to Use This Manual ” section of the EWD (the top half is illustrated above). Things to note on this page: B. Relay blocks are noted by clear ovals with the number of the relay block inside. C. Parentheses by wires indicate model specific wiring. E. Wiring harness connectors are illustrated by clear rectangles with the name of the connector inside.
The arrows are on the male connector side. J. Junction blocks are shown as grey boxes with the connector number inside an oval and the terminal number next to the oval. Technical Training 53