Hi you can find a good Live (Red) & Neg (black) in the dash.Go from battery if not sure...If poss connect up the LEDs together if got a few, so ya end up with 2 wires LIVE & EARTH ...Get yaself a nice 12v switch (Light up one) should have 3 prongs..Earth..Load..& supply,Live from the battery to supply on switch..negitive from battery to earth on switch,,now the poss on the LEDs on the Load of the switch..Now ya left with the neg wire of the Leds or neons,,this goes with the earth thats on the switch..Now the switch will light when on etc..hope this helps...
Are they Neons or LEDS lights??? just wondered as neons use alot more juice of the battery..