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Tractor Talk Discussion Board

Re: Generator light stays on


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Posted by John B. on November 12, 2013 at 05:36:44 from (50.40.67.67):

In Reply to: Generator light stays on posted by 1010 Blues on November 11, 2013 at 17:38:30:

Check the liquid levels in your battery. Check your belt tension too. Does the generator light dim when the engine is running? There are a lot of questions yet to be asked and answered here.

One quick way to check your generator is while it is running ground out the "F" terminal on the generator, this will make the generator full charge. The light should go out. If light goes out the generator is good. The idiot light grounds thru the generator armature. The armature is your generator output. If it's not putting out the light comes on. The output comes out of the "A" terminal on your generator. IF you have output then follow that wire from the GEN "A" terminal to the regulator "A" or "GEN" terminal (same terminal} Marked either way. Make sure you have output there. The regulator terminal marked "A" or "GEN" are connected by a set of points with the "BAT" terminal on the regulator. This wire goes up to your amp meter and power is disbursed from the amp meter where needed.

One other test is you can make your test light an idiot light. Hook the test light to the battery feed wire - not the ground hooked to frame - then touch the "A" terminal on the generator with your test light. The light will come on when generator is not running. Test light should go off when generator is running fast enough for output. If your test light does not perform in this way the generator is bad. Make sure generator and bracket are grounded "WELL" to the vehicle's frame. These connections are as important as any of the connections. Same goes for the regulator being grounded to the vehicle's frame.


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