electrical problem

1991 HONDA PRELUDE
159,000 MILES • 4 CYL • 2WD • MANUAL
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STEVEGREGO
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  • 1 POST
my alternator is brand new and battery tests good, but whether in use or sitting the battery is losing charge, i can get it jumped off but it immediately cuts back off
Jan 7, 2011 at 1:37 AM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
What is the charging voltage between battery terminals when engine is running?
What is the charging voltage between alternator main mast and ground?
Is there any abnormal belt noises when engine is running? Check the crank pulley for wavy movements and abnormal noise. If present, check if the harmonic damper is bad.





Jan 7, 2011 at 2:50 PM
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