Title: Diagnose (troubleshoot) the causes of brighter-than-normal, intermittent, dim, or no light operation; determine necessary action.
Course: Automotive Technology III (20104-III) > Section: Electrical/Electronic Systems: Lighting Systems Diagnosis and Repair

Diagnosis should include testing the bulb for

- continuity and wattage
- voltage source
- ground
- terminal fit/connection
- resistance in the wiring (voltage drop test).

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VI. Electrical/Electronic Systems
E. Lighting Systems Diagnosis and Repair
Task 1

Process/Skill Questions:

- What would cause a brighter-than-normal light?
- How would a loose connection affect the light?
- How would high resistance affect the light?