Won't charge battery and alternator test good

Tiny
JAYBIRD54141
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
Put rebuilt alternator and new battery in it
Sunday, December 11th, 2011 AT 4:40 PM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So you tested the alternator before installing it?Also do you have a multimeter to do some testing?
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Sunday, December 11th, 2011 AT 5:35 PM
Tiny
JAYBIRD54141
  • MEMBER
  • 5 POSTS
Advane auto tests both rebuilt and old alternantor and thry tested good
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Sunday, December 11th, 2011 AT 5:46 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So do you have a multimeter to do some testing?You will need one.
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Monday, December 12th, 2011 AT 4:48 AM
Tiny
TERRYBOOTH68
  • MEMBER
  • 2 POSTS
Yes I do have one
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Thursday, March 15th, 2012 AT 1:21 PM
Tiny
TERRYBOOTH68
  • MEMBER
  • 2 POSTS
The alternator is good but when disconnet the battery it shuts off
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Thursday, March 15th, 2012 AT 1:26 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If the old alternator was good why did you change it?Also you should never unhook the battery on a car with a computer you can damage the computer. We need to check the power feeds to the alternator.
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Thursday, March 15th, 2012 AT 3:38 PM
Tiny
CCUPDAVE
  • MEMBER
  • 61 POSTS
Hello, like the other tech said you shouldn’t disconnect the battery with the motor running on newer computer cars because the computer senses the voltage to set other things with the motor. But since you did and the motor stalled that would indicate the system is open and this is telling us that you have a bad fuse or fusible link. If a fuse is bad it will have a blown fuse in the fuse box under the hood by the battery and if a fusible link it will be off the back of the alternator or down off the starter motor to the battery, this is a main wire and it will have a smaller wire connected to a heaver wire; this is the fuse part of the wire.
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Tuesday, March 27th, 2012 AT 3:53 PM

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