i have a 65 mustang that i have started having trouble with my brake and signal lights..the brake and signal lights work ed fine but if either signal was on and you applied the brakes the signal would stop flashing and the indicator light on the dash would remain solidly on ontil the brake was released .all bulbs appear fine and i was going to tackle it this weekend but thought i would see if anyone had any ideas thanks sam

your brake lights run through the turn signal switch your switch is more then likely bad