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2000 Chrysler Cirrus Battery won't charge yet alternator is

Tiny
XBOXSTEVEN
  • MEMBER
  • 2000 CHRYSLER CIRRUS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 113,000 MILES
The battery inside of my 2000 chrysler cirrus won't charge, so I had the alternator tested and the brushes checked, and it looks great. I also doubt it's the starter. When I low test the battery, I get 12V so the battery isn't bad, but when I turn on the A/C and the headlights my voltage at 1000 rpm drops to 12.9 volts. I would hate to check each and every wire individually, so are there any directions you guys can point me to?
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Thursday, August 5th, 2010 AT 10:03 AM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
Hi xboxsteven. Welcome to the forum. Start by measuring the voltages on the two small terminals on the back of the alternator while the engine is running. One must have full battery voltage and the other one must have less but not 0 volts. Those readings will tell us where to go next.

Caradiodoc
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Thursday, August 5th, 2010 AT 2:19 PM
Tiny
XBOXSTEVEN
  • MEMBER
  • 2 POSTS
Found a fusing coil at the positive of the battery that was clean burned in half. Replaced with a new fusing coil and crimped the broken end of the wire leading to the alternator to the new fusing coil. Voltage jumped from 12.0 V at idle for the battery to 14 V. Hopefully this is the fix I was looking for. If battery still does not charge, I will update this question accordingly.
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Thursday, August 5th, 2010 AT 5:14 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
Dandy. 13.75 to 14.75 volts with the engine running is the goal.

Caradiodoc
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Thursday, August 5th, 2010 AT 5:42 PM

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