Title: Measure key-off battery drain (parasitic draw).
Course: Automotive Technology II (20104-II) > Section: Electrical/Electronic Systems: General

Measurement should include

- using an ammeter, according to manufacturer standards
- diagnosing the cause by isolating the excessively drawing circuit by disabling/disconnecting portions of the circuits or components (methodically from maxifuses to minifuses)
- diagnosing the causes of abnormal key-off battery drain
- determining needed repairs.

ASE Education Foundation
2017 Maintenance and Light Repair (MLR) Level
VI. Electrical/Electronic Systems
A. General
Task 8

Process/Skill Questions:

- What is the typical allowable range for a parasitic draw?
- What is key-off load?
- How would a technician perform a parasitic draw test? Why is this test conducted?