Strange Turn Signals/Brake Lights??

check your bulbs in the rear and the front. believe it or not, some times the 1156 bulb can be forced into the 1157 socket, when this happens, voltage/current will disrupt the circuit operations. inother words, when you apply the brakes, current/voltage will back feed all the way to the front turn signals/parking lights. [has happened to me before on a students 71 demon] many years ago!