Strange problem. My 85 coupe started having this headlight problem a short time ago. When headlight switch is turned on, the two lamps start to rotate to the open position, however the right lamp stops halfway open. There is no grinding sound, no thump, clicking or otherwise. Lamp is on, just entire bucket is not fully open. Same thing upon closing switch. However, if the switch is pulled while hood is fully opened, all works perfectly. I have checked for obstructions within the headlamp area, found nothing. Lamp also retracts perfectly to closed position while the hood is open. Something is failing halfway through the rotation. I have checked, cleaned and lubricated all moving joints visible on the assembly. Any ideas???