Circuit to separate combined DRL & Turn Signal

Hello, My 2006 Cadillac SRX uses a 3657LLA bulb for DRL and turn signal. the lamp is driven by a two wire circuit. when driving, the bulb is lit as a DRL. turn on the turn signal, the DRL extinguishes and the turn signal flashes, returning to constant DRL after turn signal is cancelled. Thus I have amber DRL's. I'd like to split these functions into separate circuit, and run a third wire into the bulb. My goal is to have a white DRL with an amber turn signal - like a switchback LED bulb. The current power to the lamp, and the two new outputs I want to have are functionally shown in this picture: OK I know what I want but I don't know how to do it. Could someone suggest a circuit design? thanks Mac

You say a third wire but to what?? What are you using for the white running lights??Gary Sather

thanks for the question. I've marked up the factory schematic maybe this will make more sense: what I've done is cut the factory wire to the amber bulb and added this new mystery circuit. while I'm showing the turn and DRL lamps as two seperate bulb, I was planning on using 3157 WHITE/ amber switchback LED's. you see, when I put a switchback LED into the SRX as is, it will only illuminate the amber LED's. there is no second circuit to power the white LED's. that's what I'm looking for, a circuit to split the combined DRL/TS hot wire into separate wires. thanks for the help everyone!2006 Cadillac SRX