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Current Draw Suspected

Test Condition:  Battery voltage OK 

NOTE:
  • Use ammeter and/or digital multimeter Fluke 83 (US 1119)  for all electrical checks.
  • Possible causes of battery drain:
    1. Corroded and dirty contacts (connectors),
    2. Bare wires (stripped insulation),
    3. Internal short circuits in components.
Fig 1: Battery Troubleshooting
G00416945Courtesy of VOLKSWAGEN UNITED STATES, INC.