A. General Electrical Diagnosis (12 questions)

1. Identify, interpret, and locate circuit components using schematic, circuit, and component locator diagrams.

2. Understand basic electrical/electronic concepts and high voltage safety issues.

3. Check continuity in electrical/electronic circuits using appropriate test equipment.

4. Check applied voltages, circuit voltages, and voltage drops in electrical/electronic circuits using appropriate test equipment.

5. Check current flow in electrical/electronic circuits and components using appropriate test equipment.

6. Check resistance in electrical/electronic circuits and components using appropriate test equipment.

7. Locate and repair shorts, grounds, and opens in electrical/electronic circuits.

8. Diagnose key-off (parasitic) battery drain problems.

9. Install, inspect, test, and replace fusible links, circuit breakers, fuse blocks, and fuses.

10. Install, inspect, test, and replace diodes and printed circuits/control modules.

11. Install, inspect, test, and replace relays and solenoids.

12. Determine correct power connection point or distribution center.

B. Battery System (5 questions)

1. Perform battery state-of-charge test.

2. Perform battery capacity (load, high-rate discharge) test and determine needed service.

3. Install, inspect, clean, service, or replace battery and terminal connections.

4. Install, inspect, clean, repair, or replace battery boxes, mounts, and hold downs.

5. Charge battery using slow or fast charge method as appropriate.

6. Jump-start vehicle using jumper cables and a booster battery or auxiliary power supply.

7. Determine correct auxiliary battery application and location.

8. Install auxiliary battery, diodes, and isolator system.

C. Auxiliary Electric Power Units (9 questions)

1. Perform current draw tests.

2. Perform voltage drop tests.

3. Install auxiliary AC/DC electric power unit, modules, relays, solenoids, switches, circuit protection devices, wiring, and connectors.

4. Inspect and repair auxiliary AC/DC electric power unit, modules, relays, solenoids, switches, circuit protection devices, wiring, and connectors.

D. Charging Systems (4 questions)

1. Inspect, adjust, and replace alternator drive belts, pulleys, fans, and mounting brackets.

2. Perform charging system voltage and amperage output tests.

3. Perform charging circuit voltage drop tests; determine needed repairs.

4. Remove and replace alternator; check pulley alignment.

5. Inspect, repair, or replace charging system connectors and wires.

E. Lighting Systems (9 questions)

1. Diagnose the cause of brighter-than-normal, intermittent, dim, or no lamp operation.

2. Install, test, aim, and replace headlights and auxiliary lighting systems.

3. Test, repair, or replace headlight dimmer switches, wires, connectors, terminals, sockets, relays, modules, and miscellaneous components.

4. Install, inspect, test, repair, or replace switches, bulbs/LED, sockets, connectors, terminals, relays, modules, and wires of parking, clearance, and taillight circuits on trucks and trailers.

5. Install, inspect, test, adjust, repair, or replace stoplight circuit switches, bulbs/LED, sockets, connectors, terminals, relays, modules, and wires.

6. Diagnose the cause of no turn signal and hazard flasher lights or lights with no flash on one or both sides.

7. Inspect, test, repair, or replace turn signal and hazard circuit flashers, switches, bulbs/LED, sockets, connectors, terminals, relays, modules, and wires.

8. Install, inspect, test, adjust, repair, or replace back-up light and warning device circuit switches, bulbs/LED, sockets, horns, buzzers, connectors, terminals, and wires.

F. Associated Electrical Circuits and Components (11 questions)

1. Install, inspect, test, repair, or replace body builder installed warning devices, interlocks, alarms, switches, relays, connectors, terminals, wires, sensors, and modules.

2. Diagnose the cause of constant, intermittent, or no alarm operation.

3. Install, inspect, test, repair, or replace alarm, interlock, circuit relays, switches, controls, sensors, modules, connectors, terminals, and wires.

4. Inspect, test, repair or replace HVAC electrical components including electro-magnetic clutches, pump clutches, motors, resistors, relays, switches, sensors, controls, modules, connectors, terminals, and wires.

5. Determine power source (chassis interface) provided by original equipment manufacturer (OEM) for auxiliary equipment connections.

6. Install chassis/trailer connection devices.