If you need the diode itself, it is a 1N4004 1Amp diode. The white band on the diode is the bar end of the schematic diode. They seldom go bad but they do get lost.
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