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| Farmall & IHC Tractors Discussion Forum |
Topic: 350 Generator
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| GordoSD
07-28-2012 14:15:37
64.33.250.162
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Factory 12 negative ground with 12v generator.
How do I check output voltage of generator when running with my multimeter? It appears ammeter is miswired also as the needle moves to the right when you turn the ignition switch on with the key, prior to cranking.
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| GordoSD
07-29-2012 11:23:34
64.33.250.162
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Re: 350 Generator in reply to GordoSD, 07-28-2012 14:15:37
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| Yep battery installed neg ground .All is well now.
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| John T
07-28-2012 19:43:42
216.249.82.117
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Re: 350 Generator in reply to GordoSD, 07-28-2012 14:15:37
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| | The open unloaded output of a generator dont really tell ya all that much and if undamped depending on the meter you use it may be jumpy n all over the map. Its to what voltage it raises a good battery (acts as a load/filter/buffer/capacitor etc) that tells you more. A good battery ought to read around 12.6 volts setting but if hooked to a good working genny it should rise to at least 13 and up to 14 depending on engine RPM and condition of battery and genny. My Troubleshooting Procedure may help more? John T
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| gene bender
07-28-2012 19:10:46
67.55.226.123
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Re: 350 Generator in reply to GordoSD, 07-28-2012 14:15:37
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| AMP ga has not been changed someone did change the polarity should be pos gnd thats why the meter is reading backwards.
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| D Slater
07-28-2012 15:39:31
184.15.5.50
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Re: 350 Generator in reply to GordoSD, 07-28-2012 14:15:37
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| Metter may be reading correct with the battery leads switched. Factory was positive ground.
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| Janicholson
07-28-2012 15:37:51
96.24.99.126
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Re: 350 Generator in reply to GordoSD, 07-28-2012 14:15:37
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| Wayne is correct, but!!! if you have a digital meter, there is probably no way to get a reading. A 200.00 Fluke Will dampen the reading, but most meters will take a sample 10 times a second, and display what ever it finds in that instant. A needle type meter will be far more satisfactory. The Generator and regulator put out radical static, and overlapping partial sine wave DC electricity. The battery likes that as well as pure DC, but the meter does not.
Reading from post to post on the battery is also OK. Jim
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| wayne in mn
07-28-2012 15:22:23
24.179.166.22
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Re: 350 Generator in reply to GordoSD, 07-28-2012 14:15:37
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| Set meter to DC volts; put black lead on clean ground and red lead to generator output terminal.
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