Gy6 baotian starter stopped working?

[slim95x]

Just like the title says, the starter just stopped working. It was working fine, the scooter started with no problems, using a car battery (still waiting for mine to get shipped LOL). Left it for maybe two-three days, waited for some parts, and now when i try, it doesnt want to start. It doesnt even crank over once, just totally dead. The kickstart works fine, and i can start it from the first push. The scooter did have some wires broken, that i re-soldered, like the wiring for the kickstand sensor, and one wire from the CDI box. Double checked them, they look fine, so now im scratching my head . Maybe the car battery is too low? But shouldnt it turn over the starter at least a bit, or make any sort of sound, cause right now its doing totally nothing. 

[aeroxbud]

Check the starter relay. If you have a multimeter, you want to make sure power is going to the relay. And coming out the other side, to the starter.

[slim95x]

Okay, so, checked the battery with my multimeter, it shows 12,41V. The relay shows the same, and drops to 12,28V when ignition is on. Tried to push the start button, and VOILA, it started right away. Drove around for around 15min, went back, shut the engine off, tried again - nothing, doesnt even engage. Now, i did notice that the positive end of the wiring is a bit trashed, and kinda britle. Maybe the positive end cant carry enough amps to spin the starter due to improper contact?

[GrumpyUnk]

You may have mucked wires, a loose connection, or a failing switch. Fix all the questionable wires so you have good solid constant connections.
Check that the brake light comes on with the key at ON. Check for voltage at the relay with the brake lever pulled tight. The starter button is connected to the other side of the relay winding, and provides ground so the relay closes. If there's no ground, it won't move. Release the brake, and measure from the relay post to ground, close the starter button switch, and you should see low ohms, indicating the starter switch is closed by the button. If not, again, the relay won't do a dang thing. Needs volts from the brake light switch, and ground from the starter button to work. And, any kickstand safety switch must also be closed, or the relay will not function.
tom

[slim95x]

Okay, so i installed a new battery, relay voltage is 12,63V. I turn the ignition on, it drops to 12.23V, and when i apply the brakes, it drops to 12.05V. The brake light is working with both of the handles. Tried to check the starter relay’s resistance, it showed zeroes, then i accidentally shorted the relay posts with the pliers, saw some sparks 😅 and it started spinning the starter. Does that mean that my starter button on the handle is shot?

[aeroxbud]

Check if you have 12v going to the relay when the button is pressed.

[GrumpyUnk]

I would check the starter switch for providing the ground for the relay. The brake light switch turns on the lights by providing 12V... which also is provided to the starter relay winding. Some setups will use the ground at the kill/run switch to provide ground to the 'other' side of the relay winding, via the starter button switch, enabling the relay winding to pull the big contacts together, touching to provide 12v to the starter motor.
So, you can check the starter button to see if it passes on the 12v from the brake switches OR provides ground.
If there is 12V on the relay when you pull the brake levers, then the relay must be getting ground from the starter button. If there is 12V on the relay when you pull the brake lever AND press the starter button, then the starter button is passing 12V to the relay, and ground at the relay must be available for the relay to work.
tom

[slim95x]

Im getting 12 volts when the ignition is on, and it drops to 11.89V and stays there when i press on any of the brake handles. If i hold the brake and push the starter button, it has no effect on the voltage whatsoever, it doesnt drop lower than 11.89V, the ony way to make the starter spin is if I short the starter relay posts together with a screwdriver. So does that mean that the started button itself is broken and just cant short the contacts by pressing it?

[GrumpyUnk]

Do you understand how to test wiring? If you check for 'ground' from one wire on the relay through the starter button, you will know if the button operated switch works or not. If you check for 12V from either/both of the brake light switches, at the starter relay, you will know if you have 12V or not. The switches must be working as the brake light comes on. BUT, do they send 12V to the starter relay? You have to test to know. It would be one of the small wires, not the two larger wires.
Get a VOM or a test light, and ground one end/wire. Touch the other wire to the connector(separated from the relay connector, with the ignition ON, and close a brake lever switch(pull the lever). If you have 12V, the light should light or the VOM indicate such. If not, check the other wire.(connector.
If you still don't have 12v you have a wiring problem from the brake switch or are on the other wire.
Test the remaining wire at the relay connector after you figure out the brake light switch (hot) side.
Connect the VOM/test light to the +/red wire terminal of the battery. Check for ground with the starter button pushed on the OTHER connector at the relay. If the switch works and the wiring is good, the VOM will read 12V or the bulb will light as the switch provides ground to the bulb/meter.
Do you need more explicit words?
tom

[slim95x]

Sorry for not writing clearly enough, im kinda new to working with electric wiring and troubleshooting On a more positive note though, the starter button started working on its own again, so i probably just need to buy a replacement to solve the problem.