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Why wont my battery keep a charge?

Tiny
JACOBLOVITT
  • MEMBER
  • 1991 MERCURY CAPRI
  • 174,109 MILES
I just put in a new alternator, alternator belt, new battery and new battery terminals and it still wont keep the charge on my battery. It will jump off great and then it will just start dying as I drive. What could that be?
Sunday, March 11th, 2012 AT 7:35 PM

12 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have the alternator load tested-any auto parts store could do it-
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Sunday, March 11th, 2012 AT 7:40 PM
Tiny
JACOBLOVITT
  • MEMBER
  • 7 POSTS
But even when the car jumps off and just sits there it still will die.
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Sunday, March 11th, 2012 AT 8:45 PM
Tiny
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Have the ignition switch-tested
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Sunday, March 11th, 2012 AT 9:10 PM
Tiny
JACOBLOVITT
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  • 7 POSTS
What the car does is it starts wen the battery has a charge. The battery light stays on even wen the car is being jumped off and the meter reads full bettery but wen I take the jumper cables off it just starts dying.
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Sunday, March 11th, 2012 AT 9:31 PM
Tiny
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Get the alternator load tested and comeback with the testing results
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Sunday, March 11th, 2012 AT 9:34 PM
Tiny
JACOBLOVITT
  • MEMBER
  • 7 POSTS
Theres also a fuse that could be blown whitch is the engine charge fuse, I think thats what it is. Where would that be located. I also just put in new spark plugs in it and its still not staying running. What else could it be other than the alternator?
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Monday, March 12th, 2012 AT 4:10 AM
Tiny
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Theres also a fuse that could be blown which is the engine charge fuse, is it blown if so the alternator will not recondition the battery
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Monday, March 12th, 2012 AT 11:20 AM
Tiny
JACOBLOVITT
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  • 7 POSTS
Where would it be located on a 91 turbo capri xr2?
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Monday, March 12th, 2012 AT 4:48 PM
Tiny
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You don't have a engine charge fuse-check the engine fuse instead in the interior fuse panel
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Monday, March 12th, 2012 AT 6:49 PM
Tiny
JACOBLOVITT
  • MEMBER
  • 7 POSTS
I did and I think the fuse im talking about is called the system charge fuse and its the fuse that runs the energy from the alternator to the battery.
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Tuesday, March 13th, 2012 AT 2:27 AM
Tiny
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Check if you have battery voltage on the BATT terminal of the alternator
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Tuesday, March 13th, 2012 AT 5:33 AM
Tiny
JACOBLOVITT
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Byt there is a system charge fuse that people have told me that and its away from all other fuses. Where would that be?
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Wednesday, March 14th, 2012 AT 5:22 AM

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