Why won't my headlights dash lights and TAIL LIGHTS come back on??? I tried the REGULATOR, not the problem it just stopped on its own. It's a 150cc Jonway scooter

Well the dash lights and tail lights are on two different circuits and fuses, but both controlled by the headlight switch.
Have you checked the fuses to see if they have power ?

Headlight switch is worn out, had the same thing on an old Ford pickup truck.

Faulty tai llight relay.

Tail lights, parking lights and dash lights are all on the same circuit...I'd go to the fuse panel under the dash and check the fuse for those lights....usually referred to as accessory lighting in the owners manual and is usually a 10A fuse.

Hope this helps...

in the rear lights you may have two bulbs one is the turn signal the other one is stop light / tail light the stop light / tail light has two filaments, one for the stop light (21 watt) & one for the tail light (5 watt) it is possible that the tail light filament is blown, try replacing the bulb to see if that fixes the problem,also check all the fuses as well.......hope this helps......cheers.

If the tail lights and the dash lights stopped working and the tail light and the panel lighting fuses are both o.k. and you can find no other blown fuses then the problem is most likely the headlight switch.

is the switch on the colum or on the dash

The relay has nothing to do with the tail lights, but replacing the switch sounds like a good idea. There's a nut holding it in place, see http://www.skandix.de/en/spare-parts/electrics/switches/switch-headlight/1027524/ to get an idea of the construction. And the price. This is not worth fiddling about unreliable workarounds...
In addition, if fuses 15 and/or 16 burn frequently there might be a problem with the tail light cabling.

Good luck
Ingo

From what you just said i dont belive the mechanic checked your fuses correctly.

Check your self to confirm, But if no avial i belive the controller for your lighting may be fried.

From what you are describing it sounds as if the headlight switch has gone bad.  That switch controls not only the headlights but the tail lights and all dash lights.  Everything that IS working is connected to other switches not related to the headlight switch.  You can either buy a new one or get a used one from a junk yard or ebay.  Pay particular attention when getting a replacement as there are 3 different models which vary depending on options such as Auto mode and Foglights.   Replacement is easy.  Using a flat screwdriver carefully pry off the trim cover around the switch. The switch is held in with some screws.  Be careful disconnecting the wires so as not to break the locking tabs. The trim just pushes firmly back into place.