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Farmall & IHC Tractors Discussion Forum
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806 putting out 16V with alt light on?

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tbone8

05-27-2005 17:21:01




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Hi,
I am sure someone can easily explain this to me. When I start my 806 with a voltmeter attached, it starts around 12.5 volts and over 15 or 20 seconds, slowly works its way up to 15.5-16volts. The alt light on the instrument cluster is lit. Could this be a bad ground on the regulator or a ground short in the field wire? I assume the light being on means the system not sensing a charge and the alternator putting out its max voltage. Incidently, it is a brand new regulator and the alternator was tested good. Thanks in advance for your help.
Tom

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JJK

05-27-2005 20:15:34




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 Re: 806 putting out 16V with alt light on? in reply to tbone8, 05-27-2005 17:21:01  
Have you checked the resistor?



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tbone8

05-27-2005 20:26:37




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 Re: 806 putting out 16V with alt light on? in reply to JJK, 05-27-2005 20:15:34  
That is a good point, I did notice that it did get fairly hot when running. I checked it with my ohmeter but I did not know what the resistance value should be for it. You think that could be the cause? Tom



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JJK

05-28-2005 08:28:49




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 Re: 806 putting out 16V with alt light on? in reply to tbone8, 05-27-2005 20:26:37  
It wouldn't hurt to put in a new one, they don't cost to much, and since you have a new regulator and the alt. checks out thats what I would do next. If I recall correctly the resistor drops the voltage in half but don't quote me. The one way to know for sure is to check with a new one. If the problem still exists then its a possibility that there could be a wiring problem and it helps to have a wire scematic to help locate what wires are what and where they go. I had a 656 come in one time that the wires were a nightmare and had to do a lot of patching. Ends were broke off and insulation coming off and rubbing through. It was amazing that it never burnt up.

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