GY6 stator fried. Green&Yellow shorted together. By beachdude01 (Read 4,003 times)

[beachdude01]

My stator died/shorted out. I replaced the stator and rectifier only to blow my lights out. I found that there is a short between my Green (ground) and Yellow (ac) at the rectifier connection.
I found that when trying to isolate the short and opening up all the connections from front to back, when I connect anything that is associated with Brown and Yellow, the short comes back to my ohm meter.
Now, after connecting everything back I can not kick over the starter. I can short it and start it, but I think I have toasted something else.
Any suggestions would be great!
It is a Jonway 150cc Robot (2010)

[justbuggin2]

start with the basics have you check the fuse if not do so with your meter they can look ok but be blown

[JR]

First of all welcome to the forum! Ok let me understand some things to be sure at what you're saying? If you unplug the plug coming from the stator by itself and ohm the yellow and green wire you have ohm resistance and think this is a short?

It is not a short. The yellow wire hooks up to the 8 coils in a series and ends up at the fianl destination which is ground.

Ohm readings on scooters sometimes are not reliable and what we need to do is start with the basics of voltage tests to see what's up.

Now since you said you blew out your headlights that tells me that the stator is putting out and either you have a bad connection to the R/R or the R/R is bad. The brown wire you mentioned feeds the head/tail lights and in some cases the instrument lights and license plate light too.

If the brown wire is hooked up and the R/R is totally bad or remeoved and you rev the engine it sends pure unregualted AC to the bulbs and will blow them in seconds.

Below is the correct readings of what the voltage ouputs are supposed to be;



With the R/R unplugged and since your bulbs are already shot we don't need to unhook them put the voltmeter on AC and test the yellow wire. It should read around 15Vac then the White and it should read around 20Vac.

Hook up the R/R and test the voltage on the red wire going to the positive terminal of the battery and with the engine revved up to say 5k RPM you should especailly with no lights on have up to 14.5 Vdc. Yes set the meter on DC when testing the red wire.

If the stator outputs are good and the DC output is bad then your problem was simply a bad R/R and not a short.

But if you suspect a short in the lighting wire circuit then ohm the brown wire from where it ties on to the yellow wire going to the R/R to ground, no reading means no short, full reading means this wire is grounded out somewhere in the system.

We're here to help so let us know what you find.

JR