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Electrical problem

Tiny
STEVEGREGO
  • MEMBER
  • 1991 HONDA PRELUDE
  • 4 CYL
  • 2WD
  • MANUAL
  • 159,000 MILES
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
Friday, January 7th, 2011 AT 1:37 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
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.
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Friday, January 7th, 2011 AT 2:50 PM

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