I have an '83 240d and I just replaced a cracked lens and bulb for the front left turn signal. The signal works fine until I turn the headlights on, then the left turn signal indicator on the dash stays lit and the left side blikers don't work. Turn the headlights off and the left side blinkers work fine. I replaced it with bulbs the previous owner left in the glove box. The bulbs are 1156LL. Any help appreciated.