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Post by mglasko on Apr 7, 2013 5:29:57 GMT -5
I have a 2002 Yamaha Vino where the headlight will not work. I traced it down to the center tap of the stator. Full stator output works fine... puts out 17-18 Volts AC to the regulator/rectifier which charges the battery fine. All other lights work just no output (less that 1 Volt AC) from the stator center tap that goes to the headlight.
I took stator off twice and seems OK - resistance and continuity seem to measure OK so I am stumped... anyone have any idea why the center tap of this stator/generator does not put out a voltage???
THANKS!
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Post by chihuahuas on Apr 7, 2013 6:02:05 GMT -5
Transistor is shorted out in the regulator will cause a no volt reading when everything is pluged in.
If you unplug the regulator/spin the engine with starter, "don't start it up it will blow the bulbs" you should see the light glow.
Also you can check the terminal to ground (on the regulator) with a diode multimeter and see the short.
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Post by mglasko on Apr 7, 2013 13:20:00 GMT -5
Thanks for the quick reply!
Already checked all those items. Bought a new regulator/rectifier and same response - no light. Also disconnected the regulator connector and looked for the AC voltage coming from the stator - less than a volt and jumping around. However I do have AC voltage (17-18V) coming out of the stator full output wire and regulator puts out a nice DC to charge the battery. So something wrong with the center tap of this stator (the 12 V AC out to the headlamp) and I cannot figure it out. Inspection of the stator no obvious issues but looks like I am going to have to take it out again.
STUMPED!... :-(
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