As mentioned, body ground problem. Same thing happened on my 72 Satellite. The front lights were getting its ground through the instrument panel instead of the harness. One of the instrument panel turn signal lights was also dimly lit. The front harness ground can get corroded or break causing the problem.
Craig


2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado