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Hello and good day folks! Upon checking all the wires coming from the stator without anyting being connected. I get some sort of reading, but nothing off the blue wire. I know that the blue and the yellow wire are connected to the same coil and I'm curious if I don't understand the system correctly. Does the yellow act as the ground or blue only has current if it's grounded? Please help! Greatly appreciated for everyone's time
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Molto Verboso
1964 Allstate Cruisaire, 2022 Husqvarna Vitpilen 401, 1972 Suzuki T500J
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Molto Verboso
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1964 Allstate Cruisaire, 2022 Husqvarna Vitpilen 401, 1972 Suzuki T500J
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What is the make model and year of what you're are working on?

https://www.scooterhelp.com/electrics/electrics.html
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Hey hey its a mid 60's 150cc vbb. Stator has 5 wire in total and it's on 6v system
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Molto Verboso
1964 Allstate Cruisaire, 2022 Husqvarna Vitpilen 401, 1972 Suzuki T500J
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Location: York, PA (the intellectual center of the universe)
 
Molto Verboso
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1964 Allstate Cruisaire, 2022 Husqvarna Vitpilen 401, 1972 Suzuki T500J
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Location: York, PA (the intellectual center of the universe)
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See if what you have matches.
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Addicted
Old douglas ..smallie with polini 115..super with nasco 177
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Addicted
Old douglas ..smallie with polini 115..super with nasco 177
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the blue and yellow wires dont touch each other. They are wound round the same plastic holder for convenience of space and separated deeper in side where you cant see
The earth is usually connected to one of the coil holding down screws. or at the far end end of where the yellow of blue wire terminate (brake or lights)

You have to replace the whole coil (very easy)
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'63 GL, '74 PV
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Location: Chicago
 
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'63 GL, '74 PV
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Location: Chicago
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areabaylove wrote:
Hello and good day folks! Upon checking all the wires coming from the stator without anyting being connected. I get some sort of reading, but nothing off the blue wire. I know that the blue and the yellow wire are connected to the same coil and I'm curious if I don't understand the system correctly. Does the yellow act as the ground or blue only has current if it's grounded? Please help! Greatly appreciated for everyone's time
What kind of readings are you doing? If this is the later VBB (as posted above) then it's the same as my GL. The ignition and headlight circuits can be said to have a ground, but not really the blue/yellow tail/brake/pilot light circuit.

When the brake pedal isn't down, the brake switch connects blue to black, so the coil powers only the tail light and pilot (in parallel). When you brake, the current runs through the brake light (on the blue wire), then to the tail light and pilot in parallel (black wire) then to the coil (yellow).
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