Share 'No instrument or license plate lights and fuse # 38 blows?'

Have a problem with fuse # 38 (7.5A) for the instrument and license plate lights.    The 7.5A fuse blows as soon as the headlight switch is turned to any 'on' position.    Nothing obvious after removing and checking the license plate light assemblies.  Also replaced the dimmer switch and headlight switch but no change.    According to the label these are the only two light circuits that share thi…