Use wiring diagrams to trace electrical/electronic circuits and utilize test equipment to measure source voltage, voltage drop (including grounds), current flow, continuity, and resistance.
Describe causes and effects of shorts, grounds, opens, and resistance problems in electrical/electronic circuits.
Measure parasitic (key-off) battery drain and determine needed action.
Inspect, repair (including solder repair), and replace connectors, seals, terminal ends, and wiring, and verify proper routing and securement.
Use appropriate electronic service tools and procedures to check, record, and clear diagnostic codes, and interpret digital multimeter (DMM) readings for electrical and electronic systems.
Identify malfunctions caused by faults in the data bus communications network.
Identify electrical and electronic system components and configuration.
Identify low voltage disconnect (LVD) systems, battery types, and system configuration.
Confirm proper battery capacity for application, perform battery state-of-charge test, perform battery capacity test, and determine needed action.
Inspect battery, battery cables, connectors, battery boxes, mounts, and hold-downs and determine needed action.
Charge battery using appropriate method for battery type.
Jump-start vehicle using a booster battery and jumper cables or using an appropriate auxiliary power supply.
Describe the operation of a starter system.
Perform starter circuit cranking voltage and voltage drop tests.
Inspect starter control circuit switches, relays, connectors, terminals, wires, harnesses, and over-crank protection (if applicable).
Identify the generator (alternator) and explain its function.
Check instrument panel voltmeters and indicator lamps.
Inspect generator (alternator) drive belt condition, check pulleys and tensioners for wear, check fans and mounting brackets, verify proper belt alignment; inspect cables, wires, and connectors in the charging circuit; and determine needed action.
Perform charging system voltage and amperage output tests and AC ripple test.
Inspect for brighter-than-normal, intermittent, dim, or no-light operation and determine needed action; inspect cables, wires, connectors in the lighting systems, tractor-to-trailer multi-wire connectors, cables, and holders.
Test, replace, and aim headlights.
Check gauge and warning indicator operation.
Identify the sensor/sending units, gauges, switches, relays, bulbs/LEDs, wires, terminals, connectors, sockets, printed circuits, and control components/modules of the instrument cluster, driver information system, and warning systems.
Verify placement of safety labels and placards on equipment and components and determine needed action.
Identify hydraulic system components and locate filtration system components, service filters, and breathers.
Check fluid level and condition and take a hydraulic fluid sample for analysis.
Inspect hoses and connections for leaks, proper routing, and proper protection and determine needed action.
Incorporate safety procedures in handling, operating, and maintaining tools and machinery; handling materials; utilizing personal protective equipment; maintaining a safe work area; and handling hazardous materials and forces.
Demonstrate effective workplace and employability skills, including communication, awareness of diversity, positive work ethic, problem-solving, time management, and teamwork.
Explore the range of careers available in the field and investigate their educational requirements, and demonstrate job-seeking skills including resume-writing and interviewing.
Advocate and practice safe, legal, responsible, and ethical use of information and technology tools specific to the industry pathway.
Participate in a Career and Technical Student Organization (CTSO) to increase knowledge and skills and to enhance leadership and teamwork.
Apply literacy, mathematical, and scientific principles and precision measurements when diagnosing problems and making repairs.
Work independently, collaboratively, and in teams to explore concerns, find causes, and take appropriate action by applying principles of STEM.
Research vehicle engine and HVAC service information including fluid type, vehicle service history, service precautions, and technical service bulletins.
