Auto Electricals study plan

State Ohm's law and the power law, then solve 20 series, parallel, and series-parallel resistor networks by hand, showing current, voltage drop, and power at each node

Calculate total resistance, voltage dividers, and current splits for mixed networks and verify three of them on a breadboard with a multimeter

Explain how inductance and capacitance behave in DC and AC circuits, and predict the effect of a coil or capacitor on a signal in an automotive load

Describe the difference between chassis ground, signal ground, and floating ground, and identify ground-referenced measurement errors in three worked examples

Draw a complete circuit diagram for a relay-driven lamp with a switch, fuse, and ground path, and annotate the current path in each operating state

Compare lead-acid, AGM, EFB, and lithium-iron-phosphate batteries on construction, charge acceptance, and failure modes, and write a one-page comparison table

Perform and interpret a battery state-of-charge test, a load test, and a conductance test, and explain when each test is misleading

Trace a complete starting circuit from ignition input through the relay, solenoid, and starter motor, and explain each stage's voltage and current behavior

Trace a charging circuit including the alternator, regulator, warning lamp or sense circuit, and battery, and explain how a failed sense lead affects output

Diagnose three given symptom sets (slow crank, no crank, battery light on while driving) and justify the most likely cause with test evidence

Identify the function of the main ECU inputs and outputs on a typical engine control system and map them to sensor types

Explain the operating principle of at least six sensor types (Hall effect, inductive, potentiometer, thermistor, piezoelectric knock, wideband oxygen) and predict their output signal shape

Describe the three main automotive network buses (CAN, LIN, and FlexRay or automotive Ethernet) by speed, topology, and typical use

Explain CAN arbitration, message priority, and what happens when a node loses communication, and relate this to a no-start or limp-home symptom

Describe how the charging system is controlled by the ECU or smart alternator regulator and why charging voltage varies with load and temperature

Set up a digital multimeter for voltage, current, resistance, diode, and continuity tests, and explain the consequence of each common misconnection

Measure current with a clamp meter and with an in-line meter, and explain when each method is appropriate and its accuracy limits

Configure an oscilloscope for a 5 V square wave and a 1 V AC signal, including time base, volts per division, trigger, and probe compensation

Capture and interpret at least four automotive waveforms: injector pulse, crankshaft position sensor, CAN high/low, and alternator ripple

Use a scan tool to read live data, freeze-frame data, and diagnostic trouble codes, and explain the limits of DTCs as diagnostic evidence

Select the correct wire gauge, insulation type, and current rating for five given load scenarios using an ampacity table and voltage-drop calculation

Crimp, solder, and heat-shrink at least six connector terminations to a pull-test standard and document which method suits which environment

Explain the purpose and selection of fuses, fusible links, circuit breakers, and relays, and size a fuse for a given load with a stated safety margin

Trace a lighting circuit from switch through relay and fuse to lamp and ground, and explain how a PWM-driven lamp or LED module differs from a simple incandescent circuit

Diagnose three wiring faults (high resistance at a connector, short to ground, open circuit) using voltage-drop testing rather than resistance measurement alone

Apply a structured six-step diagnostic process (verify symptom, gather information, form hypothesis, test, repair, verify) to a no-crank case and document each step

Perform parasitic draw testing with a clamp meter and with a meter in series, and explain how to avoid waking modules or exceeding meter ratings

Locate a high-resistance ground and a voltage drop across a switch using a loaded circuit test rather than an ohmmeter

Interpret a CAN bus waveform showing a shorted or open bus and explain the resulting network behavior

Write a repair order entry that states the symptom, the test results, the root cause, the repair performed, and the verification test

Diagnose a lighting and signaling fault involving a shared ground, a relay, and a bulb-out detection circuit, and explain why the module reports a fault

Repair a damaged harness section using correct splicing, sealing, and routing practice, and state why each step matters for durability

Explain how accessory circuits such as power windows, wipers, and central locking are controlled by body control modules and what changes when a module enters protection mode

Identify the cause of a repeat fuse failure by distinguishing a dead short from an intermittent overload, and state the test for each

Verify a completed repair against the original symptom and document any related circuits that should be rechecked

Apply high-voltage safety rules for hybrid and electric vehicle systems, including isolation, personal protective equipment, and lockout procedure, to three given scenarios

Explain correct handling, storage, and disposal of batteries, refrigerants, and waste fluids under common environmental regulations, and identify the documentation required

State the safety precautions for live-circuit testing, airbag and pretensioner circuits, and jump-starting or charging, and describe the consequences of each error

Complete a timed 60-question mixed practice exam across all eight domains and record the score by domain

Build a targeted review list from the weakest two domains and schedule the final review sessions before exam day