Handbook 652 Body Electrical Diagnosis Important Notes Sometimes it ’ s the small things that make a big difference in successfully troubleshooting a circuit. For example, some diagrams include important notes. Always read the title at the top of the diagram carefully. In some cases you may have one circuit diagram for a “ Headlight Circuit with Daytime Running Lights, ” and a another diagram for “ Headlight Circuit without Daytime Running Lights. ” Trying to troubleshoot the circuit using the wrong diagram can be frustrating. Also watch for asterisks (*), and parentheses ( ).
• Asterisks alert you to different wiring or connections based upon model, engine type, California, Federal, or Canadian specifications. • Parentheses are another way you may be alerted to specific conditions or specifications. Technical Training 67