| Re: [GMCnet] Generator Light [message #336485 is a reply to message #336477] |
Wed, 29 August 2018 09:56   |
JerryW
Messages: 256
Registered: August 2018
Karma:
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Senior Member |
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Are you using the Gene Fisher UPC cable attached to the alternator?
Emery Stora
> On Aug 29, 2018, at 5:55 AM, Ken Burton wrote:
>
> Bruce Hart wrote on Wed, 29 August 2018 06:15
>> Emory, it happened with both alternators.
>> Will check the fuse next,
>> Ken, checked voltage at center post of isolator. Will follow up with
>> connector.
>>
>> Bruce Hart
>> 1976 Palm Beach
>> Milliken, Co
>> GMC=Got More Class
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>
> OK, so you are about 1 volt over expected. That point should be around 14.7 volts give or take a few 1/10s of a volt. The other two terminals on
> the isolator should be around 14.0 volts again give or take a few 1/10s.
>
> This is from memory and could be wrong. Thee is a sense lead that is connected to the big terminal on the horn relay. On that same terminal is the
> fusible link connected to the isolator. The wire you want is a #12 red one that goes to the alternator pin #2. Along it's route it changes colors
> from red to white. I would be reading the voltage at the horn relay and also at the #2 terminal at the alternator. They should be the same reading
> and around 14.0 volts with the engine running.
>
>
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
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