Electrical Systems Maintenance Checklist

Battery & Charging System

Test battery voltage and specific gravity using digital multimeter

Inspect battery terminals for corrosion, tightness, and proper connection

Verify alternator output voltage and charging rate at idle and RPM

Test starter motor draw and engagement operation

Inspect battery cables for damage, fraying, or loose connections

Exterior Lighting Systems

Test all headlights for proper operation and beam alignment

Verify tail lights, brake lights, and running lights functionality

Check turn signal operation and proper flash rate timing

Test hazard warning lights and emergency flasher systems

Verify backup alarm and reverse lights operation

Interior Lighting & Controls

Test passenger area lighting including overhead and aisle lights

Verify driver area lighting and instrument panel illumination

Check emergency lighting system and battery backup operation

Test door lighting and step illumination systems

Warning Systems & Indicators

Test all dashboard warning lights and indicator functions

Verify engine warning lights and diagnostic system operation

Check transmission and brake system warning indicators

Test door ajar warnings and passenger alert systems

Wiring & Electrical Connections

Inspect main wiring harnesses for damage, chafing, or exposure

Check electrical junction boxes and connector security

Verify ground connections and chassis grounding points

Inspect fuse boxes and relay panels for proper operation

Communication & Safety Systems

Test two-way radio system and emergency communication devices

Verify GPS tracking system and fleet monitoring equipment

Test security camera system and recording equipment

Verify wheelchair lift electrical operation and safety features

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Vehicle & Technician Information

ELECTRICAL SAFETY WARNING

Electrical System Notes & Voltage Readings

Electrical System Summary

Electrical System Analysis & Recommendations

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