Today's technicians need to be total climate control management forensic scientists Using the wiring schematic, we determine the best location for us to make our tests is at the compressor itself. We are going to use our meter and a low amp clamp to perform a non-intrusive amperage test on the A/C compressor clutch while requested. We MotoLogic may be in the circuit. (Thanks to Al Santini for teaching me that method decades ago.) Looking at and understanding the electrical schematic enables you to pre-diagnose the circuit before you make any tests. MotoLogic Below you see the voltage indicating 14.38 volts with the key on and the engine running. So, the state of health of the charging system looks good and this number represents what the value should be close to at the components we are testing with the car running. 22 ACTION * June 2017