battery dumby light wont go off - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 03-25-2013, 04:16 PM Thread Starter
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battery dumby light wont go off

96 PSD with battery dumby light that wont go off. I just put new batterys in it a month ago and a new alternator like a year ago and the volt gauge reads the same as it alway has with the gauge readinf on the M on normal. any suggestions?
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post #2 of 7 Old 03-25-2013, 04:22 PM
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bad connection on the alt.

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post #3 of 7 Old 03-25-2013, 04:33 PM Thread Starter
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Just in one of the plugins?
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post #4 of 7 Old 03-25-2013, 04:54 PM
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more than likely the single plug on the left of the alt as you look at it from the front. i broken the plastic part of the clip of and squeeze the crimp spade connection a little bit and mine stopped flashing at me.

or your new alternator could be bad

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)



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post #5 of 7 Old 03-25-2013, 04:56 PM Thread Starter
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Ok will try thanks for the help
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post #6 of 7 Old 03-25-2013, 09:14 PM
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I read a while back about having a bad diode in the voltage sensing part of the circuit that gives you that warning light can cause it. Which means you can replace it or just don't worry about it.

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post #7 of 7 Old 03-25-2013, 09:24 PM
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Confirm voltage with a volt meter, before you chase anything

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