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Demonstrate safe work habits when working on tractor and vehicle electrical systems
Assessment Strategies
written objective examination
simulated work environment
Criteria
examination includes answers to questions describing the importance of safety when working on tractor and equipment electrical systems
you assume responsibility when working on tractors and equipment electrical systems
you comply with all personal and environmental safety practices associated with eye protection
you comply with all personal and environmental safety practices associated with hand tools
you comply with all personal and environmental safety practices associated with power equipment
you comply with all personal and environmental safety practices associated with proper ventilation
you comply with all personal and environmental safety practices associated with the handling of chemicals/materials in accordance with federal, state, and local regulations
you comply with all personal and environmental safety practices associated with the storage of chemicals/materials in accordance with federal, state, and local regulations
you comply with all personal and environmental safety practices associated with the disposal of chemicals/materials in accordance with federal, state, and local regulations
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Explain fundamental electrical/electronic system principles
Assessment Strategies
written objective examination
by submitting a mind map explaining fundamental electrical/electronic principles
Criteria
Examination includes answers to questions regarding fundamental electrical/electronic principles
Mind map includes a brief description of the basics of electron flow.
Mind map includes a definition of a conductor, insulator, and semiconductor
Mind map includes a definition of electricity
Mind map includes a definition of voltage
Mind map includes a definition of current
Mind map includes a definition of resistance
Mind map includes a definition of voltage drop and its effect on a circuit
Mind map includes a definition of Ohm's Law
Mind map includes a definition of electrical power
Mind map includes only relevant and necessary details
Mind map is concise without being sketchy
Mind map evidences correct grammar, punctuation, and spelling
Mind map is typed and organized into proper principles
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Demonstrate proficient use of a multi-meter (DVOM, DMM) to measure voltage, amperage, and resistance
Assessment Strategies
by replacing the multimeter battery
by testing and replacing the multimeter fuses
worksheet - metric conversion for electrical quantities
by performing voltage and resistance measurements on a tractor/equipment electrical circuit worksheets
worksheets - Preliminary Electrical System Checks
Criteria
you recognize safety precautions to be observed while using the multimeter
you recognize when multimeter battery has failed
you test multimeter fuses
you replace mutilmeter fuses if needed
you assume responsibility in the use of the multimeter
you conform to proper multimeter etiquette
you explain the different functions of a mutlimeter
you explain the proper usage of a multimeter for measuring voltage, current, and resistance
you identify metric prefixes and abbreviations for measuring voltage, current, and resistance
Worksheet includes answers for converting to actual values and using a prefix
Worksheet includes description of equipment being tested
you verify the correct operation of any components you had disconnected from the circuit
you measure availible voltages with key off and engine off
you measure available voltages with key on and engine off and all accessories off
you utilize the Min/Max feature of multimeter to measure cranking voltage at the batteries
you compare voltage measurements at the alternator and dash gauge reading with engine running
you provide a recommendation of any repairs needed
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Investigate series, parallel, and series-parallel circuit laws and circuit faults
Assessment Strategies
by submitting a mind map of the laws for series, parallel, and series-parallel circuits
by submitting a mind map identifying and defining 3 circuit faults
worksheet - Predict Changes in Voltage, Current, and Resistance in a Circuit
Criteria
Mind map includes characteristics of a series circuit
Mind map includes characteristics of a parallel circuit
Mind map includes characteristics of a series-parallel circuit
Mind map includes circuit fault name, definition, and at least two examples of each fault
Mind map includes only relevant and necessary details
Mind map is concise without being sketchy
Mind map evidences correct grammar, punctuation, and spelling
Mind map is typed and organized into proper principles
Worksheet questions are all answered
Worksheet has 24 of the 30 questions answered correctly
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Identify basic types of electrical system parts and components
Assessment Strategies
lab identification exam -minimum of 80% score
given reference schematics, diagrams, components, and technical manuals
Criteria
you identify the basic types of electrical and lighting systems used on tractors and self propelled vehicles
you identify different types of electrical parts and components
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Diagnose opens, shorts, grounds, and high resistance in a circuit
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Build a signal circuit for a central processing unit
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Correlate electrical/electronic system principles and Ohm's Law to electrical circuits
Assessment Strategies
worksheets - Ohm's Law
packet - Electrical/Electronic Modules; using training boards
Criteria
Worksheet includes calculations for voltage, amperage, and resistance using Ohm's Law
Worksheet includes calculations for Watt's, H.P., and other simple electrical/electronic equations
Worksheet answers solve for the missing element in the circuit
Worksheet answers are properly labeled
Worksheet questions are all answered
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Maintain electrical/electronic system terminals, connectors, wire, and cable
Assessment Strategies
worksheet - wiring harness
skill demonstration - battery cable replacement
worksheet - soldering repair
Criteria
you follow all personal and environmental safety procedures
Wire harness includes proper length wire
Wire harness includes the correct selection of terminals for the gage (size) of wire
Wire harness includes the correct gage (size) of wire
Wire harness includes the correct amount of insulation stripped from wire
Wire harness includes heat shrink where necessary
Wire harness includes proper crimping of terminals to wire
Wire harness withstands strength test
Wire harness includes the proper type of protective loom
Battery cable selection is the correct gage (size) for circuit requirements
Battery cable selection is the correct length
Battery cable has the proper amount of insulation removed
Battery cable terminals are orientated before they are crimped
Battery cable terminals are correct for the gage (size) of cable
Battery cable terminals are correct diameter for their connection points
Battery cable terminals are crimped using the correct crimping dies
Battery cable has solder applied to inside of both terminal ends
Battery cable includes adequate amount of heat shrink
Battery cable includes heat shrink that has not been overheated
Soldering repair includes the removal of the damaged selection of wire
Soldering repair includes the placement of the correct size and length of heat shrink over the two ends of the wire
Soldering repair includes a small overlap of the two splice ends
Soldering repair includes a splice clip if needed
Soldering repair includes the correct amount of insulation removed from the wire
Soldering repair includes a uniform amount of solder applied to the joint
Soldering repair includes heat shrink over the splice joint
Soldering repair includes heat shrink that has not been overheated
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Summarize the function and operation of battery, starting, and charging system parts and components
Assessment Strategies
written objective exam
worksheets
Criteria
Examination includes a summary of the function of batteries
Examination includes a summary of the function of charging system parts and components
Examination includes a summary of the function of starting system parts and components
Examination includes a summary of the operation of batteries
Examination includes a summary of the operation of charging system parts and components
Examination includes a summary of the operation of starting system parts and components
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Interpret electrical system diagrams and flow charts
Assessment Strategies
written exam using wiring diagrams and charts
worksheets - electrical/electronic symbols
Delco Remy starting system diagram
skill demonstration - tracing current flow through an electrical/electronic circuit on schematics or diagrams
Criteria
you select the appropriate diagrams and charts for the assigned piece of equipment
you interpret the electrical wiring diagram and flow chart
you diagnose electrical system problem on piece of equipment
Worksheet identifies the shown schematic symbol by name
Worksheet includes additional means of showing a particular symbol
you located the component that is represented by the symbol on a piece of equipment
Worksheet includes a brief description of the function and operation of the component as it relates to circuit operation
Worksheet includes identification of sub circuits within starting system
Worksheet includes sub circuits properly color coded
you verbally describe to the instructor, the proper operation of the circuit starting at the battery and ending at the starter motor
you interpret electrical/electronic symbols
you color code each specific circuit using different colors for different scenarios
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Perform maintenance and service on tractor and equipment battery systems
Assessment Strategies
worksheets - Battery Inspection and Testing
Criteria
you demonstrate all safety precautions and rules associated with servicing a battery
you include battery specifications
you perform a visual inspection and description of the general appearance of the battery, cables, terminals, hold-downs, and boxes
you check the tightness of the cables at both ends and describe the condition
you include a battery leakage test
you record meter readings and an explanation of what is indicated by the readings
you perform a battery voltage test
you record meter readings and summarize the condition of the battery based upon the visual inspection and test
Worksheets are filled out in order and are complete
you describe the equipment being worked on
you record battery specifications
you DIAGRAM BATTERY ARRANGEMENT AND SHOW DIAGRAM TO THE INSTRUCTOR BEFORE DISCONNECTING
you remove, clean, and replace batteries in a single and multiple battery system
you perform a battery state of charge test using a refractometer and determine the specific gravity of each cell
you compare cell readings to determine if a load test should be performed
you determine the correct load to be placed on battery
you perform battery capacity (load, high discharge) test and determine needed service
you perform a three-minute charge test if battery failed load test
you make recommendations on battery condition and reusability
you determine correct procedures for disposal of batteries and battery electrolyte
you clean, repair, and replace battery cables and connectors
you charge battery using slow and/or fast method on single battery, multiple batteries, series hookup, and/or parallel hookup
you clean, repair, and replace battery boxes, mounts, and hold downs
you jump start a vehicle using jumper cables and a booster pack or auxiliary power unit
you select the correct batteries and install them in equipment or vehicle
you connect battery(s) according to your battery arrangement diagram
you verify correct battery performance while in equipment or vehicle
Battery Inspection and Testing worksheets are filled out in order and are complete
Battery Inspection and Testing worksheets are neat and clean
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Diagnose, service, and repair starting systems
Assessment Strategies
simulated work environment
given tools and equipment
skill demonstration given a tractor or vehicle with an electric starting system
written exam -minimum of 80% score
Criteria
you select the correct tools and equipment
you follow personal safety practices
you diagnose the tractor or vehicle starting system
you service the tractor or vehicle starting system
you repair the tractor or vehicle starting system
you test and check starter relays and switches
the starting system performs according to manufacturer's specifications
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Diagnose, service, and repair charging systems
Assessment Strategies
given tools and test equipment
given technical manuals
given personal safety equipment
written exam -minimum of 80% score
skill demonstration given tractor or other self-propelled vehicle
Criteria
you select the appropriate tools and test equipment
you follow all personal safety practices
you diagnose tractor and equipment electric charging systems
you service tractor and equipment electric charging systems
you repair tractor and equipment electric charging systems
you follow tech manual guide for inspecting parts and rebuilding starter
the charging system performs to manufacturer's specifications