Turn signal wires which wire is for ground, positive and negative?

Hi,

If this is the left front (driver's side) The black wire with the blue tracer should be ground. Check for continuity to ground to confirm.

Now, As far as the other two, there should be a white with a gray tracer for the left front turn signal (power). Also, the white with a dark green tracer is for the parking light on the left front.

I attached the schematic below. Let me know if this helps and if I got the correct side.

Take care,

joe

See pics below.