Q. Why is there no power after I turn the key on?
The first thing to check is the fuse. Locate the battery and trace the + positive wire and you will should find a fuse or fuse block. Check the fuse to see if it has blown. Even if it looks alright, you can check with a multimeter to see if there is continuity across the fuse. If not, it needs to be replaced. If the fuse is alright, check your battery's voltage to make sure it isn't dead. If it is, try charging it first but it may need to be replaced.
If you have power at the battery and the fuse is in working order yet still have no power, check for battery 12V+ making it to the ignition switch at one of it's terminals. If no battery power is present on any wire at the switch you will need to trace wires and look for disconnected or loose connectors or damaged wiring. If you have 12V+ at one terminal of the ignition switch and still no power to the scooter with the key on, use a multimeter to check for power on another wire from the ignition switch that should be present with the key on and not with the key off. If no power is getting through the switch, most likely your ignition switch is faulty or there is an issue with connections. If you have power into and out of the switch when on and still no signs of electrical life with the key on, try to trace the 12V+ switched wire coming from the ignition switch to see if there are any obvious breaks or other issues.
Related Info :
Scooter Battery Checks
Individual System Wiring Diagrams
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