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Discussion Forum
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Electrical Info Needed

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Dave (Md)

06-27-2003 10:17:53




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Hi all. Got an 861 that has been converted to 12V by a previous owner. The fuel gauge and sending unit have been disconnected (all wiring removed). Does the gauge or sending unit matter what the system voltage is? Is there a way to test both, or either, for functionality? If memory serves (the tractor is not handy at the moment) there is a post on the center back of the gauge, and one off center. Which goes to the sending unit & which goes to power?
Thanks in advance for help.
I read this forum every day & appreciate all the info shared... Many thanks to all concerned!
Dave

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Scottey841

06-28-2003 06:19:16




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 Re: Electrical Info Needed in reply to Dave (Md), 06-27-2003 10:17:53  
The gauge and sending unit are different between the 6V and 12V systems. If your 6V stuff works you can experiment with a resistor in the power lead to the gauge. Ignition switch power goes to one terminal and the other terminal goes to the sending unit. Newer gauges are marked I for ignition power and S for sending unit. The standard way to test is to put the proper voltage, 6 or 12 v to one terminal, leave the other terminal open and see what the gauge reads. Then connect the open terminal to ground and see if the gauge swings the other way. If it does the gauge is good. Beware if you decide to replace the gauge and sending unit for 12v ones. I bought a Stewart Warner gauge and then a 12v sending unit off of Ebay but they don't work together. I then bought a sending unit from JC Whitney and everything works now. Sorry for the long winded answer.

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Dave (Md)

06-28-2003 06:39:30




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 Re: Re: Electrical Info Needed in reply to Scottey841, 06-28-2003 06:19:16  
Thanks for the info. I was hesitant to try anything for fear of frying a possibly good component.



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