The park light bulb should be on the top of reflector-not the bottom.One of the 3 prongs was obviously shorted out.On my A I run 6V with gen & have very good lights.I used 32-32 std bulbs,repop reflectors new lenses ,as the old lenses looked slightly yellowed with age when compared with the new ones,but it wasnt noticeable otherwise.I also soldered a ground wire to the rear of the bulb sockets & grounded them under a sanded offspot on the frame under the front hood hook screw.The other HL wires go directly from bulb sockets to bollet connectors on inside of rad shell.Also solder as many terminals as possible as a crimped terminal on its own is not as good as a soldered one.I can cruise at 55 in OD at night & have good lights.A 6V system isjust fine,but good grounds are very important.IF you are running AC,then12V N is mandatory.Besides the ugliness of seeing an alt under the hood,its simply not needed on the A.