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400/4 Battery not charging

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THUNDERDOWNUNDER:
Checked out field coil and stator all see OK . Wish it would cool down here !

Bryanj:
If field coil and stator are OK on resistance ground the green wire, connect the white to battery positive and with the engine running and the multimeter set to AC voltage check the readings between each of the 3 pairs of yellow wires out of stator when disconnected from loom.

THUNDERDOWNUNDER:
How do I use multimeter to test A/C voltage out of yellow wires ? There are two prongs from meter one positive one negative . Does one go to ground ?

Bryanj:
Nope there will be an ac volt setting on the mutimeter and you put one probe on each of 2 yellow wires, there are 3 "pairs" of wires, dont matter which way round as its AC not DC

THUNDERDOWNUNDER:
Thanks didn’t want to blow up my multimeter . All yellow wires tested 15/16 volts at 1000 rpm . It was even higher at 4000 rpm something like 24 volts . Just tested reg/rectifier . Diodes seem ok all around 500 one way only .  It’s a second hand unit which came on the bike . It says 12 Volt Reg/Rec SH538-12-5.7 SHINDENGEN JAPAN  . Someone has written in Pen 85 VT 250 INTEGRA  . Wondering if that’s the problem ?

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