IS250 Lights Diagram in Lexus IS 250 / Lexus IS 250C Club / Lexus IS 220D & IS 200D Club Posted July 4 Hi there. Im looking to change my side lights to running lights. To do this I need either the lights wiring diagram or the colours of the wires at the steering column for the side lights. My intention is to short the wires so the side lights switch is bypassed. Always on.