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Old 04-25-2015, 11:50 PM   #1
canadian_diesel1964
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Generator light stays on when truck off...after new alternator.

I can't figure it out...light stays on ...truck is off...after the new alt install....
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Old 04-26-2015, 01:43 PM   #2
ACK
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Re: Generator light stays on when truck off...after new alternator.

Just want to confirm, if you take the key out of the ignition, the alt light stays on? Did you upgrade from ext to int regulated alternator?
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Old 04-26-2015, 03:07 PM   #3
zplightning
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Re: Generator light stays on when truck off...after new alternator.

My truck does this if I turn the key to the far left, left of the off position - not sure if that is some sort of accessory setting but might be something to check. If I remember correctly "off" is the notch to the right of that.
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Old 04-26-2015, 04:43 PM   #4
canadian_diesel1964
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Re: Generator light stays on when truck off...after new alternator.

Hey guys yes I have the key out I upgraded to a new alternator the internal regulated alternator change had already been done
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Old 04-26-2015, 08:43 PM   #5
canadian_diesel1964
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Re: Generator light stays on when truck off...after new alternator.

I'm getting 12.32 volts on the number one terminal of the alternator with the power off,..I'm thinking I have a short inside the alt?
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Old 04-26-2015, 10:40 PM   #6
Wrenchbender Ret
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Re: Generator light stays on when truck off...after new alternator.

Sounds like the alt. has a shorted diode.
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Old 04-26-2015, 10:50 PM   #7
canadian_diesel1964
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Re: Generator light stays on when truck off...after new alternator.

Thank you...I'm thinking so too
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Old 04-27-2015, 06:13 AM   #8
brokenspoke
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Re: Generator light stays on when truck off...after new alternator.

Check out "madelectrical" lots of inf0
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Old 04-27-2015, 03:50 PM   #9
canadian_diesel1964
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Re: Generator light stays on when truck off...after new alternator.

Thank you...I did...very good info...I called the place that sold me the alternator and they have ordered me one that will work...
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