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Not alternator or battery, what else?

Tiny
KAYLATRACEY1991
  • MEMBER
  • 1994 MITSUBISHI 3000GT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 187,000 MILES
I have a 1994 Mitsubishi Galant LS, and when I take the negative battery terminal off the car stops running, and I already replaced the battery and the alternator. What else could it be?
Thursday, May 5th, 2011 AT 4:27 PM

5 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
First off, don't ever do that unless you want to by every computer in the car. You need to test the charging voltage across the battery with the engine idling and no accessories on
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Thursday, May 5th, 2011 AT 4:45 PM
Tiny
KAYLATRACEY1991
  • MEMBER
  • 3 POSTS
I tested the alternator and it outputs 15amps on idle.
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Thursday, May 5th, 2011 AT 5:43 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
That's not what I asked you to do.
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Thursday, May 5th, 2011 AT 5:52 PM
Tiny
KAYLATRACEY1991
  • MEMBER
  • 3 POSTS
How do I test the charging voltage across the battery?
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Thursday, May 5th, 2011 AT 7:31 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You take a digital voltmeter and you measure the voltage across the battery between positive and negative. It has to read between 13.5 and 14.8 volts
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Thursday, May 5th, 2011 AT 7:33 PM

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