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The three phases go through the full wave rectifier so it won't make any difference - trust me. It might be an idea to check the ac voltage on each of the yellows. I don't know what the actual voltages are without measuring them but all three phases should read roughly the same. If there's nothing coming out of the alternator, the next thing to check is if there's 12V across the exciter coil (the one in the middle). Without a magnetic field from the exciter coil you ain't gonna get juice in the yellow wires. There's a little man inside the regulator with a volt meter measuring the battery. If it's too low he thinks "ay up, getting a bit low here, best get the alternator going" so he flicks a little switch and makes the exciter coil get excited, hence the alternator gets making juice.If the little man measures it too high he has to turn the exciter coil off or the battery will blow up and the little man will get a bollocking.Hope this helps.
Quote from: mike the bike on July 10, 2017, 09:31:50 PMThe three phases go through the full wave rectifier so it won't make any difference - trust me. It might be an idea to check the ac voltage on each of the yellows. I don't know what the actual voltages are without measuring them but all three phases should read roughly the same. If there's nothing coming out of the alternator, the next thing to check is if there's 12V across the exciter coil (the one in the middle). Without a magnetic field from the exciter coil you ain't gonna get juice in the yellow wires. There's a little man inside the regulator with a volt meter measuring the battery. If it's too low he thinks "ay up, getting a bit low here, best get the alternator going" so he flicks a little switch and makes the exciter coil get excited, hence the alternator gets making juice.If the little man measures it too high he has to turn the exciter coil off or the battery will blow up and the little man will get a bollocking.Hope this helps.Thanks again,Can u explain in laymans terms.. testing the ac current across the three yellows is that done engine running on not? Also where how do I check the 12v on the exciter coil?Wish that little man would start doing his job properly or I'm giving him the boot!!Oh also.. if I disconnect the stator block from the harness and test the three yellows coming from the stator (yellow to yellow all combinations) I get correct readings.. if I put the black probe on the frame and the red probe on each yellow wire I get nothing whatsoever! Does this mean it's shorting somewhere??Al