YOU ARE GOING TO HAVE TO GET TWO RELAYS AND WIRE YOUR BRAKE AND TURN FILAMENT TO THEM. THE NORMALY CLOSED TERMINAL WILL GO TO THE BRAKE THEN THE NORMALY OPEN TERIMINAL WILL GO TO THE TURN SIGNAL OR FLASHER OUT PUT DEPENDING ON HOW YOU SYSTEM IS WIRED. TO SWITCH THE RELAY YOU WILL HAVE TO PICK UP NON-FLASHING POWER FROM YOU TURN SIGNAL SWITCH THAT TELLS THE RIGHT OR LEFT RELAY TO CLOSE THEN THE SIGNAL WILL WORK AND OVER RIDE THE BRAKE LIGHT FOR THAT BULB ONLY. OK THIS IS KIND OF CONFUSING BUT ONE OF YOUR RELAYS WILL BE FOR RIGHT AND THE OTHER FOR LEFT.
IF YOU ARE USING THE SAME FILAMENT FOR BRAKE/TURN AND PARKING LIGHT THEN YOU WILL NEED A RESISTOR IN LINE FOR YOUR PARK LIGHT TO BE DIMMER THAN YOU BRAKE/TURN LIGHT. TRY GETTING THE BOOK CALLED THE AUTOM0TIVE ELECTRICAL HAND BOOK. THIS BOOK WILL HELP SOME THE REST YOU WILL HAVE TO EXPIRAMENT WITH. ALSO TRY TO DRAW OUT YOU ELECTRICAL SYSTEM OR AT LEAST THIS CIRCUIT SO YOU CAN SEE IT ON PAPER THIS MAY HELP YOU SEE HOW IT "SHOULD" WORK.
