When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You don't have a fuse box - nor a service manual, by the sound of it! If your wiring is original you only have circuit breakers and from what you describe they haven't interrupted anything.
Start with say the headlamp and carefully check through the wiring, connectors, ground points etc, check wires for damage, chafing etc, pull apart any connectors, clean and coat with dialectric grease. Repeat on each of the other light circuits. This sounds like something a bit obscure, so you need to draw on your inner Sherlock Holmes!
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.