Battery or Alternator?

Asked by Jun 23, 2018 at 01:27 PM about the 2002 Ford F-150

Question type: Maintenance & Repair

My 2002 Ford F-150 all of a sudden wont start. I can jump it off but wont run
long before it dies. I jumped it off and disconnected the battery, it died. In the
older days this was a valid test to determine if battery or alternator was bad. My
results indicate bad alternator. Is this still a valid fault identification test?

1 Answer

26,400

Bad idea doing that with vehicles that have computers can short out the whole system.

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