ASE T6 Electrical/Electronic Systems (Medium/Heavy Truck) study plan
ASE T6 Electrical/Electronic Systems (Medium/Heavy Truck) · Give each week a clear focus.
8 weeks · About 6 hours per week
General Electrical/Electronic System Diagnosis
Map the six exam domains to their percentage weights and rank study time accordingly
Explain the difference between voltage drop testing and resistance testing, and state when each is preferred
Demonstrate how to use a DMM to measure voltage, resistance, current, and voltage drop on a 12/24V truck circuit
Trace a basic truck schematic from battery positive through a fuse, switch, and load back to ground
Your checkpoint
A one-page personal diagnostic flowchart covering voltage, ground, and voltage-drop checks, plus a hand-traced schematic of one simple circuit
General Electrical/Electronic System Diagnosis
Diagnose opens, shorts to ground, shorts to power, and high-resistance faults from symptom descriptions
Interpret wiring diagrams to locate splices, grounds, and connectors in a described circuit
Describe how to test a relay, solenoid, and diode in a circuit
Identify parasitic draw test procedures and acceptable draw thresholds on a heavy truck
Your checkpoint
A written response to five hypothetical fault scenarios, each naming the fault type, test sequence, and expected meter readings
Battery and Starting System Diagnosis and Repair
Perform and interpret a battery state-of-charge and load/capacity test
Explain how to test for parasitic draw and how to check battery cables and grounds for voltage drop
Diagnose a no-crank condition by isolating battery, cable, starter control, and starter motor causes
Describe starter bench and in-vehicle current-draw testing and typical cranking current expectations
Your checkpoint
A battery and starting system diagnostic checklist with pass/fail criteria for each test, written as if for a shop use
Battery and Starting System Diagnosis and Repair & Charging System Diagnosis and Repair
Diagnose a slow-crank or no-crank complaint using a structured test sequence
Explain alternator charging circuit operation, including regulator and sense/field circuits
Perform and interpret charging system output, voltage-drop, and AC ripple tests
Identify causes of overcharging, undercharging, and no-charge conditions
Your checkpoint
A combined starting/charging diagnostic worksheet completed for three hypothetical complaints, each with a test sequence and likely root cause
Charging System Diagnosis and Repair
Diagnose charging system faults on a multi-battery or 24V system, including equalizer or series/parallel arrangements
Explain the effects of a failed diode, open field, or bad sense wire on charging output
Describe how to test for a parasitic draw that discharges batteries overnight
State how to verify belt condition and pulley alignment as charging system causes
Your checkpoint
A written case study of one overcharge and one no-charge scenario, each with meter readings and a confirmed diagnosis
Lighting Systems Diagnosis and Repair
Diagnose headlamp, marker, tail, brake, and turn signal faults using voltage-drop and continuity testing
Explain how a turn signal flasher, hazard switch, and multi-function switch interact in a circuit
Describe how to diagnose LED lighting faults, including polarity and driver module issues
Interpret a lighting circuit diagram to isolate a fault to a specific segment
Your checkpoint
A lighting system troubleshooting guide covering incandescent and LED circuits, with at least six fault categories and their test methods
Gauges, Warning Devices, and Driver Information Systems Diagnosis and Repair
Explain how a sending unit, gauge, and wiring form a circuit, and how to test each component
Diagnose a false or inoperative warning lamp or driver information message
Describe how to test a coolant temperature, oil pressure, or fuel level sender with a DMM
Identify causes of gauge sweep, pegging, or intermittent readings
Your checkpoint
A gauge and warning device diagnostic matrix mapping symptoms to likely causes and confirming tests
Horn and Wiper/Washer System Diagnosis and Repair & General Electrical/Electronic System Diagnosis
Diagnose horn circuit faults, including relay, switch, and ground issues
Diagnose wiper and washer faults, including motor, switch, park circuit, and washer pump
Complete a timed mixed-domain practice set and review every missed item
Re-review the highest-weight domains (1 and 2) using a personal weak-area list
Your checkpoint
A final review sheet of weak areas with corrective actions, plus a completed mixed-domain practice score log
Milestones
Week 2: Can explain and demonstrate voltage-drop testing and fault isolation on a described circuit without notes
Week 4: Can describe a complete battery, starting, and charging test sequence with pass/fail criteria from memory
Week 6: Can trace a lighting circuit diagram and name the test for each segment within five minutes
Week 8: Scores at least 80% on a mixed-domain practice set and has a written weak-area remediation list