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Elements and Performance Criteria

1. Prepare to repair wiring harness and loom
   • Job requirements are determined according to workplace instructions
   • Technical procedures and information are accessed and interpreted
   • Hazards associated with the work are identified and risks are managed
   • Tools and equipment are selected and checked for serviceability
2. Test wiring harness and loom assembly
   • Wiring harness and loom are inspected for damage
   • Harness and loom are tested using appropriate tools and fault finding techniques according to workplace procedures and safety and environmental requirements, and without causing damage to components or systems
   • Inspection and test results are compared with manufacturer specifications
   • Faults are identified from test results and causes of faults are determined
3. Remove wiring harness and loom
   • Wiring harness, loom assembly and associated components are labelled before removal
   • Harness and loom components are removed according to manufacturer specifications, workplace procedures and safety requirements, and without causing damage to components or systems
4. Repair and refit wiring harness and loom
   • Electrical circuit wiring diagrams are accessed and interpreted from manufacturer and component supplier specifications
   • Harness and loom are repaired or fabricated using appropriate techniques and according to workplace procedures
   • Repaired or fabricated harness and loom assembly is refitted and reconnected according to manufacturer and component supplier specifications
   • Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair or fabrication process are rectified
5. Complete work processes
   • Final inspection is made to ensure work is to workplace expectations and vehicle, vessel or machinery is presented ready for use
   • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
   • Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures
   • Workplace documentation is processed according to workplace procedures
6. Prepare to repair wiring harness and loom
   • Job requirements are determined according to workplace instructions
   • Technical procedures and information are accessed and interpreted
   • Hazards associated with the work are identified and risks are managed
   • Tools and equipment are selected and checked for serviceability
7. Test wiring harness and loom assembly
   • Wiring harness and loom are inspected for damage
   • Harness and loom are tested using appropriate tools and fault finding techniques according to workplace procedures and safety and environmental requirements, and without causing damage to components or systems
   • Inspection and test results are compared with manufacturer specifications
   • Faults are identified from test results and causes of faults are determined
8. Remove wiring harness and loom
   • Wiring harness, loom assembly and associated components are labelled before removal
   • Harness and loom components are removed according to manufacturer specifications, workplace procedures and safety requirements, and without causing damage to components or systems
9. Repair and refit wiring harness and loom
   • Electrical circuit wiring diagrams are accessed and interpreted from manufacturer and component supplier specifications
   • Harness and loom are repaired or fabricated using appropriate techniques and according to workplace procedures
   • Repaired or fabricated harness and loom assembly is refitted and reconnected according to manufacturer and component supplier specifications
   • Post-repair testing is carried out according to workplace procedures to confirm fault rectification, and any further problems detected as having been introduced during the repair or fabrication process are rectified
10. Complete work processes
    • Final inspection is made to ensure work is to workplace expectations and vehicle, vessel or machinery is presented ready for use
    • Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
    • Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures
    • Workplace documentation is processed according to workplace procedures

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Tools and equipment must include:

multimeter continuity tester crimping tools soldering equipment heat gun terminals and connectors wire and cabling.

Safety and environmental requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for: using safety data sheets (SDS) selecting and using personal protective equipment (PPE) identifying firefighting equipment safely handling hazardous materials and toxic substances following soldering equipment safe operating procedures environmental requirements, including procedures for trapping, storing and disposing of hazardous materials and toxic substances released during repair processes.

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Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standard defined in the unit’s elements, performance criteria, range of conditions and foundation skills:

repair an existing basic wiring harness or loom assembly of the wiring systems of two different vehicles, vessels or machinery

fabricate a new basic wiring harness or loom assembly for the wiring system of one vehicle, vessel or machinery.

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Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to repairing wiring harnesses and looms, including procedures for:

using safety data sheets (SDS)

selecting and using personal protective equipment (PPE)

identifying firefighting equipment

safely handling hazardous materials and toxic substances

following soldering equipment safe operating procedures

environmental requirements, including procedures for trapping, storing and disposing of hazardous materials and toxic substances released during repair processes

location and content of workplace procedures and manufacturer specifications relating to wiring harnesses and looms

types of wiring systems found in vehicles, including:

basic single wiring, including:

tailer harness

driving lights harness

accessory wiring harness

complex multi-wiring with varying wire gauges

controller area network databus (CAN-bus) wiring, including:

twisted pair

shielded wiring

testing procedures, including:

accessing electrical terminals and using test probes without damaging connectors, fuse holders or wiring

testing wiring harnesses and looms, including resistance and voltage drop and circuit performance checks

visual and functional assessments, including:

component damage and wear

component corrosion

water and moisture ingress

damaged insulation

frayed wires

burnt wiring

terminal and connector damage

removal procedures for wiring harnesses and looms, including:

accessing wiring and removing panels and covers

removing and replacing components

disconnecting terminals from connectors

repair procedures of wiring harnesses and looms, including:

determining cable and terminal types and sizes according to circuit current draw

wire soldering procedures

terminal crimping

replacing male and female terminals within a connector housing

protecting and routing harness and loom

post-repair testing procedures of wiring harnesses and looms, including procedures for checking full operation of associated electrical systems.

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