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Charging system issue

Tiny
STENNY
  • MEMBER
  • 1992 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
So my truck battery won't charge. I have replaced battery, alternator checked grounds, added grounds still can't get battery to get a charge.
Tuesday, February 9th, 2016 AT 12:06 PM

6 Replies

Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Check all fuses/fusable links. Use a multimeter to check voltage at the battery and the voltage at the alternator. If it is 13-14 volts at the alternator, but only 10-12 at the battery then you know there is a connection issue between the two.
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Tuesday, February 9th, 2016 AT 12:33 PM
Tiny
STENNY
  • MEMBER
  • 13 POSTS
Yea it is a little less between the 2 but I can't figure out why I ran a new wire from alt to battery and that didn't help anything. I believe its the gauges. But there is also a battery fuse which has no power going to it. And I recently had battery to starter wire arc out and touch metal and melt wire and kill old battery ever since I have had charging issue it seems like battery connects to start the truck then when truck is running alt is running everything on truck but not charging battery because when I shut down the truck it has same power it did before engine started
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Tuesday, February 9th, 2016 AT 1:00 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Sounds like you know the issue. You need to trace that write to that fuse and see where it failed.
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Tuesday, February 9th, 2016 AT 1:05 PM
Tiny
STENNY
  • MEMBER
  • 13 POSTS
It was actually not battery fuse it was crk whatever that is
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Tuesday, February 9th, 2016 AT 5:47 PM
Tiny
STENNY
  • MEMBER
  • 13 POSTS
What does this black box on firewall that had a fuse inside goto? I checked fusible links they all seem good
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Tuesday, February 9th, 2016 AT 5:49 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,702 POSTS
That is a system fuse, are all the fuses in the fuse box that need to be? Sounds like you have one missing
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Monday, February 15th, 2016 AT 8:16 AM

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