5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

charging question

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Old Jan 23, 2008 | 02:04 PM
  #1  
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five0fm
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hey guys i just rebuilt my motor and put a new 3g alt on it. before i took the motor apart i was pushing around 14 volts all the time. as i was taking the alt off i accidentally touched the 4g wire to a bolt and it sparked ( stupid me forgot to disconnect the battery) anyway now all i can get out of it is 11volts. i cant remember if it happened before or after the spark mishap but when i turn on my electric fan the battery just drains and eventuallly the car shuts off..any ideas?
Old Jan 23, 2008 | 02:08 PM
  #2  
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Default RE: charging question

Good question! I waiting for answers as well.
Old Jan 23, 2008 | 02:39 PM
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Default RE: charging question

Well, have you checked your fuses? When you installed the 4g wire, didn't you run a 150 amp in line like you were supposed to? Where is the 4g wire coming from? Is there power (battery voltage) to it. Maybe you shorted the new alt
Old Jan 23, 2008 | 02:48 PM
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five0fm
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the batt is in the trunk so i ran it to the starter solenoid and ill check the fuzes right now
Old Jan 23, 2008 | 03:04 PM
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Default RE: charging question

OK, but where does the wire come from the back of the alt? Is that the 4g wire or am I mistaken?
Old Jan 23, 2008 | 03:15 PM
  #6  
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five0fm
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no you are correct the 4g wire goes from the alt to the starter solenoid...but i jsut fixed it..what happened was i had stock gauges on when i first put the alt in...i changed them out to a florida 5.0 autometer set up and i didnt put the battery indicator feed to a 12volt source ( i didnt get instructions with the autometer pod) and i just looked on there site. apparently if that isnt connected your alt is an open circuit...anyway now that i fixd that im back to 14 volts now...one question...where is the cheapest place to get a 150 inline?
Old Jan 23, 2008 | 03:18 PM
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Default RE: charging question

http://www.partsexpress.com/pe/showd...number=071-952

That's where I biught my stuff from. Scroll down the page and there are fuse holders there too.
Old Jan 23, 2008 | 04:27 PM
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five0fm
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thanks a lot pro...im gunna order them tonight
Old Jan 23, 2008 | 04:30 PM
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Default RE: charging question

anytime
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