[Solved] Baotian BT49QT-12 50cc 4T Chinese Scooter: No Spark, Hard Ignition, Troubleshooting Tips & Diagrams

Hey. I have a Chinese scooter Baotian BT49QT-12 that is 50cm3 and 4T. There is no spark on the scooter on the scooter. It has always been hard to ignite and has not been lighting up lately. What to check in turn?

Is this an electrical problem on the cables? What colors are going to the ignition (Which cable colors are to be shorted for the ignition switch? Does anyone have an electrical diagram? One thing is certain is the sensor cube of the lowered foot which is bypassed (soldered wires).

At first glance, I would replace the ignition module, even from a colleague as you have the option. If this does not bring positive results, check the continuity of the wires and the voltage from the stator coils. You can also check their resistances. The coil of the higher voltage supplying the module is about 300V. Pulse generator up to 50V.

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What I can see from the eye is the AC module. He does not need battery power.

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How does the coil look like?

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Also check the finger (pipe).

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Candles too.

Thank you skm for the answer. I do not have a second module for a replacement and I do not have a friend from whom I could replace. Can I check its resistance parameters on pins with a multimeter?

I have a second HV coil with an attached pipe because it is welded together and I have replaced one cable - I still have no spark. What kind of tension should it be before the coil and the coil on the pipe? The battery is poor despite charging, I always start from the kopek, not from the starter, although it spins but does not surprise.

I do not have a second candle - can I check the meter what voltage comes out of the 300V AC pipe when digging? Where to measure the voltage and resistor exactly? Of course, I buy the candle as soon as I check the other options.

Is the switch accidentally damaged and there is no electrical continuity, it is difficult to get to it by pulling plastics, maybe I can connect some pins to simulate turning the key?

It is enough to disconnect one cable from the so-called quenching and you're already missing it. You can not measure the module yourself with an ohmmeter on the pins and measure it with a multimeter. In them, the thyristors usually sit, but it can be a diode or capacitor and after driving. You can not fix it yourself because it is flooded with resin and not demountable.

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What is the pin layout and what they are connected to you find on the net. It is full of graphics. Enter the AC ignition module and you have.

The probie is that you do not have access to the ignition because of the problem of disassembling the plastics that contain it - someone had previously glued it. Therefore, I would like to disconnect the wires from the ignition switch under the seat or connect them. I do not know if these wires going to the ignition should be shorted at the height of the AC module at the battery or under the seat? How to do it?

Disconnect the 1 wire from the extinguish from the connector on the ignition module and should help if you think it's the fault of the ignition switch, and leave it alone, because you will not get to the order all the more as someone has already fumbled with it.

I disconnected the black and white wire which according to Schemes are used to extinguish, thinking that it is the fault of the ignition and the same thing, the scooter does not start and there is still no spark. So I'm buying a new module, see if it helps.

Such modules were PLN 30 each.

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Did you change candles because I did not read it ?? I saw some people putting their toes in a pipe and checking if they were kicking ?? But I advise against such things.

I have not changed the candle yet, I will do it in the near future, I do not intend to put my finger in there because there is a lot of volt there is something I can check and that's it. The module I will buy.

Before you buy a new module, it is worth checking if there is power to this module from the motor and if the pulse generator is functional.

I just mentioned it in the 2 # post but the measurements were not done by the author and he did not check the power supply.

I measured the resistance of the pulse generator and it is OK. It turned out that after ordering the new module, the scooter started to give a spark and the engine started working, that's why I thank you for the hints, I click helped