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  #1  
Old 07-21-2005, 12:07 PM
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Word of warning

Never let your battery cables get loose, it fried my alternator >.<
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Old 07-21-2005, 12:48 PM
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Yep. This is why the old mechanics trick of pulling off a battery cable while the engine is running to "see if the alternator is good" is a no-no for modern cars. You're lucky the voltage spike didn't kill your ECU. You can not take the battery out of the electrical system of a car while it is running....but you can on an airplane. For safety reasons their engines run completely independant of the battery and alternator (once started of course).




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Old 07-21-2005, 02:25 PM
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I once had a loose cable and I noticed because I started popping headlights. Also the running voltage was getting higher (almost 16V!)
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Old 07-22-2005, 01:57 AM
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Very interesting I did'nt know that about the battery thing . I'm going to check mine ASAP
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  #5  
Old 07-22-2005, 02:03 PM
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Significant Technical Input
Quote:
Originally Posted by red95svx
Yep. This is why the old dumbass' trick of pulling off a battery cable while the engine is running to "see if the alternator is good" is a no-no for modern cars. You're lucky the voltage spike didn't kill your ECU. You can not take the battery out of the electrical system of a car while it is running....but you can on an airplane. For safety reasons their engines run completely independant of the battery and alternator (once started of course).




Dave
Fixed your quote. No 'good' mechanic would have ever done this on any alternator equipped system.
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Old 07-22-2005, 02:45 PM
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However on a side note If you pull the Jumper cables off and it dies immediatly then you know you have problems. did that once little econo box after looking around I still wasn't going to pay the 500 he wanted for it
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Old 07-22-2005, 08:32 PM
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Amen! The resulting arc is what makes flashbulbs flash bad juju!
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