in my 1973 mustang the turn signals dont work. i found the flasher and it only gets .5 volts to it. i went to my shop manual and it says there should be a black with green hash input and a blue output. i see the blue output but the other wire is a white with purple wire. i tracks a black/greenhash to the ignition switch, anybody know what i can do to solve this.

 

Any progress?