I HAVE A BATTERY DRAIN AND NEED TO KNOW HOW TO FIND IT ?

  • Tiny
  • tempestcar
  • 1994 Mitsubishi Expo
  • 15,022 miles

I drve the car and it will drain my battery, I changed the altornator new battery cables new battery and it still drain it to much to start and keep running for more than 20 minutes

Monday, November 7th, 2011 AT 2:55 AM

7 Answers

  • Tiny
  • rasmataz
  • Member

Have the alternator load tested and double check all connections/wiring on the alternator and battery

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Monday, November 7th, 2011 AT 3:15 AM
  • Tiny
  • tempestcar
  • Member

The altornator was changed twice and the cables are new too I just changed them on wensday. And it still has this problem and it is drive me nuts

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Monday, November 7th, 2011 AT 3:30 AM
  • Tiny
  • rasmataz
  • Member

Okay check the availble voltage at the battery with a voltmeter while engine is running and tell me what's the voltage

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Monday, November 7th, 2011 AT 3:33 AM
  • Tiny
  • tempestcar
  • Member

I did that and it shows 12.85 on the voltmeter and when the car is off it is 12.40

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Monday, November 7th, 2011 AT 3:42 AM
  • Tiny
  • rasmataz
  • Member

Your alternator is not reconditioning the battery -double check wiring

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Monday, November 7th, 2011 AT 3:50 AM
  • Tiny
  • tempestcar
  • Member

Ok I will thank you.

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Monday, November 7th, 2011 AT 4:06 AM
  • Tiny
  • KHLow2008
  • Expert
  • 41,938 posts

Check the crank pulley for a bad harmonic damper. If the pulley is bad, the alternator would not be able to provide the required charge as it is turning below the required speed.

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Monday, November 7th, 2011 AT 7:42 AM

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