IMPORTANT - Is this only happening with one light? Or all?
In most vehicles, the blinker circuits are fairly simple. However, on scooter and motorcycles they’re (generally) much simpler.
For example, on my bike there are really only 4 sets of components:
- Voltage Source
- Flasher Relay
Due to this simplicity, I don’t think that there are many bike that have a system to “warn you” that a lamp is going, rather, this is a natural function of the relays design.
The relay frequency is affected by the amount of resistance on a given circuit. Less resistance = faster blinking because voltage can get to filling the caps faster. More resistance = slower blinking.
I see 2 possible situations depending on if the problem is whole system or just one lamp:
One Odd Lamp
Bad grounding (earth or negative), incorrect wiring, wrong bulb. One of these type of things. You really just have to follow the circuits and look everywhere for a problem.
Problem with all blinkers
In this case - you really need to inspect the whole system, both running and off! If your voltage regulator/rectifier has failed this could create a lot more expensive problem, not to mention be a risk to whoever is operating the scooter!However, it’s not common for the VR/R to fail like this. Usually this will just break the circuit completely.
That said, if the problem is system wide, you’re looking at voltage source or flasher relay as the answer. Of those 2 I’d say replace the flasher relay. It could be coincidence that or failed the same time as repairing it, you could have accidentally done something that damaged it... regardless, those are the only options really. Other than that, you’re looking at pulling the whole thing apart and carefully diagnosing everything.
Also, it may not help, but try disconnecting or undoing whatever recent work you did on the scooter. It is possible that a faulty or cheaply manufactured part could cause the voltage drop needed to mess that up.