Electrical/Electronic Systems Exam Solved 100% Correct

a 1. Check electrical circuits with a test light; determine needed repairs. - ANSWER-Test circuits with a volt meter or test light. If the component is getting the required voltage, but non-operative, there is a good chance that component is bad and should be replaced. a2. Check voltages and voltage drops in electrical/electronic circuits with a voltmeter; interpret readings and determine needed repairs. - ANSWER-A voltage drop test across a component gives a good representation of the condition of that component. Generally, an electrical component should use all of the supplied voltage. If it does not, it is usually safe to say there is a problem with said component. a3. Check current flow in electrical/electronic circuits and components with an ammeter; interpret readings and determine needed repairs. - ANSWER-Ammeters are connected in series with electrical circuits. Higher than normal currecnt flow would indicate high voltage or low resistance. Low current flow would indicate too high resistance or too low voltage. a4. Check continuity and resistances in electrical/electronic circuits and components with an ohmmeter; interpret readings and determine needed repairs. - ANSWER-When measuring continuity, make sure the circuit is not energized. The meter will supply its own power to perform this test, and meter damage can occur if the circuit is energized. Use the continuity test to find opens in circuits, where there should not be opens. No continuity would indicate an open. Continuity would indicate the circuit is closed. If it supposed to be closed, but there is no continuity, then you can assume there is a problem. On the other hand, if the circuit is supposed to be open, but there is continuity, there is a problem. Resistance specs are published on most everything these days. Use an ohmeter to measure resistance of the component in question, and compare to published specifications. If not within range, there is a problem. a5. Check electronic circuit waveforms using an oscilloscope; interpret readings and determine needed repairs. - ANSWER-An oscilloscope converts electrical signals to a visual representation of voltage signals over a period of time. An upward wave means a voltage increase. A downward wave means a voltage derease. A FLAT line indicates steady voltage. Compare your findings to what the changes in voltage should be to make a determination on whether or not the component is functioning properly. a6. Use scan-tool data to diagnose electronic systems; interpret readings and determine