Recently purchased a prosport boost gauge. It came with a harness that has 4 wires. I understand i will need to wire the red one to constant 12v, black one to the ground, white one to acc. The problem im having with is the orange wire. Im having a hard time locating the headlight switch wire. Can anybody help me with identifying the headlight switch wire of 2003?

 

try google alarm install for the car. should have a diagram of the wires