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Harry Ferguson Tractors Discussion Forum
:

little red light

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Frank (VA)

11-01-2003 17:46:12




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The little red light on the dash (generator light?) comes on now whenever I run the motor. It only used to do this when you'd first would turn the key. The generator was rebuilt about 50 hrs ago and the voltage regulator was replaced then also along with the wiring harness. How do I troubleshoot this. Otherwise the tractor works fine.
Frank




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Joe Ferguson

11-01-2003 18:39:53




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 Re: little red light in reply to Frank (VA), 11-01-2003 17:46:12  
Hi Frank

You may need to repolarize the generator
you did'nt mention if you have a 6 volt or 12
volt system. If it is a 12 volt negative ground connect a jumper wire to the field terminal on the generator and start engine rev it at 1/4 throttle and touch the positive post of the battery with the other end of the jumper for one second...if correct the light will go off.

If a 6 volt positive ground do same as above but touch the negative post of the battery for one second.


Good luck

Joe ferguson

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Frank Va

11-02-2003 17:10:10




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 Re: Re: little red light in reply to Joe Ferguson, 11-01-2003 18:39:53  
It is 6 volt. Which is the field terminal?
Thanks



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Ray,IN

11-02-2003 18:50:21




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 Re: Re: Re: little red light in reply to Frank Va, 11-02-2003 17:10:10  
Surest way to locate the field terminal is to inspect the voltage regulator. One teminal is marked F =field. Just trace the wire to the generator post, or, jump from the F terminal on the regulator.



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Ray,IN

11-02-2003 04:50:22




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 Re: Re: little red light in reply to Joe Ferguson, 11-01-2003 18:39:53  
To check for charging getting to the battery, use a VOM to read the voltage at the battery terminals. A nominal reading quite near battery voltage(ie: 6VDC or 12VDC) without the engine running, and about 1- 1.5 volts higher with engine running(depending upon state of battery charge)will determine if the charging system is working. If you switch on the headlights and voltage drops without recovering you must find the fault.

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