Most of the blown fuse issues are probably caused by touching wires together or to the frame while testing the light. Most of the lights [if not all] on the Bonnies have separate power and ground wires because the fenders and headlight/signal unit are rubber mounted and thus isolated from the frame/battery ground. If any of the new lights are single filament bulbs and have two wires,its a plug and play deal. If they only have one wire [ie Kuryakyn Silver Bullet] they have a power wire and ground thru the mounting bolt . This is ideal when the lights are relocated to new brackets mounted directly to the frame.If the lights were mounted to an isolated place like the fender,a separate ground wire might have to be run from the existing wire harness,the battery neg. or to the frame nearby and then hooked to the mounting bolt.All very simple. dual filament lights are just as easy,ground the same etc,they just have two power wires.
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