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flickering alternator light

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Old Dec 18, 2007 | 09:51 PM
  #1  
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flickering alternator light

My alternator light is flickering, but it is charging fine and the alt meter is showing normal voltage. I can see the meter jump when I have a load on it at idle, so I know its working.

anyone know what would be causing this?

it is a 93 F150 w/5.0 and 4X4

Thanks.
 
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Old Dec 18, 2007 | 09:52 PM
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The light in the guage?
 
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Old Dec 18, 2007 | 09:54 PM
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No, there is a dummy light and an alternator guage too. The red dummy light that says "ALT" is constantly flickering.
 
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Old Dec 18, 2007 | 09:54 PM
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chek the connection at the selenoid.. i had this trouble to and cheked the wires and saw it was loose.. so i got that fixed and no more flikering lights.. chek all the connections.. of the alternator
 
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Old Dec 18, 2007 | 09:56 PM
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Didnt know there was one as mine is newer. Or I never saw it come on. Do as DJ said. He knows his stuff.
 
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Old Dec 18, 2007 | 10:13 PM
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i not shure about that dummy light.. but mine was doing it with an battery like light... maybe its the same one as yours.. becuase yours is newer..


start it let someone move the wires... a bit see if the light flashes... if it does you have loose conections
 
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Old Dec 18, 2007 | 10:19 PM
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Ill see if I have a bat light next time I start it up.
 
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Old Dec 20, 2007 | 06:16 PM
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Check the small wire running to back of alt. The conections fail. I have extras in work bench it happens so much to different truck
 
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Old Dec 20, 2007 | 06:39 PM
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99% sure i have a red battery light
 
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Old Dec 20, 2007 | 06:58 PM
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My 93 has a BATT light, left hand side of the panel next to the turn signal.
 
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Old Dec 20, 2007 | 07:15 PM
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From: Hampton,Va
Mine has a yellow BATT light, weird cuz when my alt went south and the battery went dead , it never came on.

Mike
 
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Old Dec 25, 2007 | 09:51 PM
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Checked the connection at the solenoid and it was fine. Here's and update...the light goes off when I rev the engine higher. It is no longer flickering when idleing, it is always on, then when the rpm goes over 1800 or so, it starts flickering then when over 2200 it goes off? Could this be the brushes? The alt meter is still showing good voltage though (like 16 or so) from idle on up???
 
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Old Dec 26, 2007 | 12:30 PM
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mary Xmas may God bless you and your family

16 Volts!?!?!!? then its flikering becuase its overcharging... i had that problem when my regulator was bad my voltage meter was WAY!! up by the 18..
and the batt light was on...

chek your regulator.. bring it by napa or someplace have them test it for you its free .. and its soppose to be 14 Volts at idle.


maybe its not the brushes brushes will cuase low charge... regulator maybe going bad?
 
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Old Dec 26, 2007 | 12:50 PM
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OK its probably not 16 volts, but it is where it always has been somewhere around 14 probably. And the light goes off when the rpms get higher, but the alt meter stays the same.
 
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Old Dec 26, 2007 | 02:05 PM
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strange.. but dont worry i had that problem also... its probley the alt is old and worn and the Amp is low.. have it cheked at a autoparts store for .. then post back
 
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