Why won't my Kymco start? Has power to everything and the relay swifch clicks, that's all it will do

have you checked the relay between the battery and the starter?
i had a ltd 2 that suddenly refused to start after trying everything else it turned out to be a little black box(relay) on the fender well between battery and everything else!

Is the battery at 12.6 volts,old or dead?

Cables loose?

Starter Solenoid bad or starter bad

Year make and model ?
Can you bypass the relay and power the pump to see if the engine will continue to run ?

Check with a multi tester for voltage coming through the ignition switch lead wires + to switch wire - to ground you shoul get 12volt or higher, with the switch off you should have one live (feed from battery ), on you should have 2 or 3 in and out feed (possibly 2 out one for ignition one for light curuit), or disconnect the switch and check for continuity (12v battery wire and a bulb if you dont have a multi tester between each pin on the switch plug when turned on you should get a curcuit when on.

Check the starter and the starter relay or fuse. A client of mines car was doing the same thing, it ended up being two issues, the starter not working anymore, and a relay that was bad. If I am not mistaken everything should be labeled in the fuse box under the hood and will tell you where the fuse/ relay is for your vehicle

Take your spark plug out of the cylinder, reconnect it to the ht lead and place it on to your frame if you see a spark then your coil is fine, try a new spark plug, if there is no spark get a new coil and plug.

Remember there is a 2t and a 4t version of the kymco vitality and the spark plugs are different.

If you hear relays clicking sometimes and the jeep won't start, at those times, is the check engine light illuminated on the dash, or not? If no check engine light is on the dash, at times when the jeep won't start, your ecu is in need of repairs. The ecu sends power to the ignition and fuel relays and when the ecu starts to malfunction, the relays usually start clicking.