NABTEB Automobile Electrical Works study plan

State Ohm's law and power relationships and solve at least ten series, parallel and series-parallel resistance problems without a calculator error.

Explain voltage, current, resistance, electron flow and conventional current, and distinguish conductors, insulators and semiconductors with one automotive example each.

Describe how a magnetic field is produced by a current-carrying coil and how electromagnetic induction generates voltage, linking both to the alternator and the ignition coil.

Sketch and explain the operation of a relay, a potentiometer, a thermistor and a capacitor, naming one vehicle circuit that uses each.

Describe the construction, chemistry and discharge behaviour of a lead-acid starter battery, including the role of plates, separator, electrolyte and grid alloy.

Explain the difference between a conventional and a maintenance-free or AGM battery and state the correct charging procedure and safety precautions for each.

Trace the alternator charging circuit from battery positive through the warning lamp, regulator and field winding, and explain how output is regulated to about 14.2 volts.

Diagnose a no-charge condition logically: check belt tension, battery voltage, alternator output, warning lamp circuit and earth returns in a stated order.

State the correct procedure for safe jump-starting and for testing a battery with a hydrometer and a load tester.

Explain the operation of a pre-engaged starter motor, naming the solenoid, field coils, armature, commutator, brushes, pinion and overrunning clutch and what each does.

Describe how the ignition switch, neutral or clutch switch, starter relay and solenoid interlock to prevent cranking in gear.

List six common starting faults and the test that isolates each, including voltage-drop testing of the earth strap and the heavy cable.

Perform and record a voltage-drop test across the battery terminals and starter cables, stating the acceptable limit.

Explain how a conventional coil ignition system builds and collapses the primary field to induce the secondary high voltage, and why the condenser or capacitor matters.

Describe the function and testing of contact breaker points, distributor cap, rotor arm, HT leads and spark plugs, including correct plug gap and heat range.

Explain how electronic ignition replaces contact points and name the sensors used to trigger it.

Identify the safety precautions for working on ignition systems, including high voltage and electronic component protection.

Draw a complete lighting circuit showing battery, fuse, switch, relay and earth, and explain why relays are used for high-current lamps.

Describe the operation of headlamp main and dip circuits, side lamps, brake lamps, indicators with a flasher unit, hazard lamps, horn and reverse lamps.

Explain the purpose of fuses, fusible links, circuit breakers and relays, and select a fuse rating for a stated load.

Identify common wiring faults, including high-resistance joints, short circuits, open circuits and poor earths, and state the symptom of each.

Describe good harness practice: routing, clipping, grommets, colour coding, terminal crimping and soldering.

Apply a systematic fault-finding routine: confirm the complaint, gather information, test logically from supply to load, and verify the repair.

Demonstrate correct use of a multimeter for voltage, resistance, current and continuity, and of a test lamp for load testing.

Explain how to read a vehicle wiring diagram to locate a fault, and interpret a simple fault symptom to a likely circuit section.

Describe the operation and typical faults of auxiliary equipment: wipers and washer, windows, central locking, instrument cluster, radio and charging sockets.

Interpret a fault code or symptom table and justify a diagnostic decision in writing.

Select and use the correct hand tools and test equipment for a given job, and state the care and calibration checks for each.

Apply workshop safety rules: battery acid and hydrogen handling, eye and hand protection, safe jacking, isolation of circuits and fire precautions.

Read and interpret a simple automotive electrical drawing, identifying symbols, cable sizes and terminal numbers.

Measure and calculate using the metric system, convert between units, and use a vernier caliper and micrometer to read a stated dimension.

Explain basic trade science relevant to the trade, including conductor resistance, cable current rating and the effect of temperature.

Revise all ten domains using a timed mock paper and score at least 70 per cent overall.

Re-study the two weakest domains identified by the mock and re-test those areas.

Practise explaining five key systems aloud in under two minutes each, as if answering an oral examiner.

Confirm recall of all formulas, symbols, safety rules and standard test values without notes.