I don't have the parking brake switch. Pictured is a purple or violet wire out of the harness that I think is for the switch? This is the only unused wire left in this area. 1966 Satellite. If this is the proper wire. Where can I purchase the switch. I also need a new blinker flasher as my blinkers go on but do not flash. Its a Signal Stat 142 which seems to be popular. Will a Signal Stat 178 work also.