little help needed with starting issue By caliboy (Read 1,198 times)

[caliboy]

Hi everyone, happy to find this forum and all the great info within. I am in need of little help with my scooter. I have a 2008 shanghai shenke scooter 150cc with 5k miles on it. I got a few years back and it has been working great. I had it looked at over the years for regular services and it has served me without any issues (so far).

last week i went to start it up but it did not start. the battery is good and everything works but it wont start with the start button. when i turn the key on the "on" position all the electronics light up. there is power coming to the horn, the brake light sensors and speedometer but there is no power coming to the start switch or the kill switch. when i bypass and give direct power to the starter, the scooter starts up. any help as to what i should check? there does not seem like much electronics on the bike, just a few replays. can you guys ID the parts marked in the pictures?

not sure what this is...




the one in the right i am guessing is the starter replay...



some people have been saying i need to go buy a new one but i like to live within my means and dont want go spend money i dont have to when i can fix myself and ride a scooter that is still running good! so please dont criticize my scooters age and help me fix the problem.

[rob63]

The top pic is the regulator/rectifier.
The bottom pic is the starter solenoid (right) and CDI (left). Some people call the solenoid a relay.
You`ve already mentioned that putting voltage directly to the starter makes it work, if you turn ignition on and put a screwdriver blade across the two nuts on the solenoid, does the starter work ? If not then the solenoid is faulty.
If it does work, then go to the connector for the two small wires on the solenoid, and see if you have voltage coming through when you press the starter button. If not then go to the starter switch and check to see if you have voltage in and voltage out when button is pressed.
If you have voltage in but none out then the button is faulty.

[Alleyoop]

Check the yellow and green wire going to the SOLENOID.
When you squeeze the brakes it sends juice to the SOLENOID and when you PUSH the start button it completes the Curcit by grounding the SOLENOIDs contact inside and inside the CONTACT TOUCHS BOTH Terminals just like if you jumped the two terminals and it then allows the 12v from the battery to go to the STARTER.

So only two things can be bad the PUSH BUTTON not grounding or the SOLENOID is bad.
Now if when you push the STARTER you can hear the SOLENOID CLICK then that tells you the SOLENOID is difinitly bad and you cannot fix them.

You can make your on with a TOGGLE SWITCH run a wire between the two SOLENOID terminals to a toggle switch and when you flip it, it will then send juice to the other terminal to the starter. But you have to have a heavy duty switch and wires.
Alleyoop

[caliboy]

OK, thnx for the input guys. here is what is going on...

with the key in the "on" position i put a screwdriver between the large connectors on the solenoid and the bike starts up. this is telling me that the solenoid is good.

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i checked the smaller plug on the solenoid and there is no power coming to it at all. when i push the start button there is no power coming to the plug on the solenoid.

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i moved onto the start button, when i turn the key on the "on" position, there is no power coming to the start button. the plug in the back with two wires is not getting any power.

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this is the ignition plug. when the ignition is in OFF position there RED wire is active. when i turn the ignition to ON position the black wire becomes active with power. not sure if this is correct but i think it means the ignition is working...

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so what else is there? there is one 20 amp fuse next to the battery but i dont see any others anywhere on the bike. what else could be wrong?

[caliboy]

so wait a min, the start button does not have positive coming to it?? it is ground only for completing the circuit? im i understanding it correctly?? i got a new kill switch and replaced that but it did not change anything. there is also no power coming to any of the kill switch wires, are they all ground wires? i wonder if the CDI is bad or the regulator...not sure what they do on the bike...any info on this?

[Alleyoop]

To SEND VOLTAGE TO THE SOLENOID YOU HAVE TO SQUEEZE THE BRAKE either one. The START BUTTON does not send power it just GROUNDS THE SOLENOID.

SO TAPE ONE BRAKE ON and TEST the YELLOW AND GREEN WIRE GOING INTO THE SOLENOID. With the BRAKE ON it should be live.
If squeezing the brake no power then it could be just the BRAKE switch that is bad. But to make sure you need to test the wire going to the BRAKE SWITCH and see if it it getting voltage.

ALSO just because you JUMPED the two terminals on the SOLENIOD and it spun your starter DOES NOT MEAN THAT THE SOLENOID IS GOOD. THE CONTACT inside may be bad. That is why you need to test if the SOLENOID is getting VOLTAGE on the GREEN AND YELLOW WIRE.
Alleyoop

[Alleyoop]

That is why a LIGHT TESTER is very good to have. All you do is clamp the wire to ground and probe the wire that should have voltage, if it does the tester will light up. It only costs a few bucks and they are indispensable to test stuff on a scoot.
Alleyoop

[caliboy]

I do have a tested and many other tools.

what i have been saying is that there is no power coming to the solenoid connector but there is power coming to the brake sensors as the lights do work properly.

so anyways, i think just found the problem. i had an HID ballast grounded to the body of the scooter and i just read about the AC/DC power charging system on the bike. i unplugged the regulator and the bike starts right up with the start button. i plug it back and it does not start. i disconnected the HID ballast ground wire from the body and the bike start up with the start button. i am guessing it was a grounding problem. i will rewire the ground for the ballast directly to the battery tomorrow to see what happens. for now i ended up braking the key so i had to order a new lock/key set from ebay.