My right turn signal doen't blink. The lights, front and rear come on steady. The indicator in the dash stays steady as long as the signal is selected. At night, the first time I select RT signal with the headlights on the indicator comes on and stays on even when RT signal is not selected and the front & rear turn signal lights only burn steady as long as the RT turn signal is selected. I've changed the flasher pot, both bulbs, cleaned the terminals & bulb & socket contacts. Nothing wants to cure the problem. The strangest thing is I have a '76 Ford Granada & a '78 LTD II and they both have the same problem and on the right side too. Any ideas would be greatly appreciated?