You mentioned fuses and it is worthwhile to note that if the fuses in your car are original, then they are 10 years old. It costs next to nothing to buy a replacement set, and it takes next to no time to remove old/replace new and clean the contacts with contact cleaner. Not only does this increase the reliability of your electrical system, it can *cure* some otherwise incurable problems. It is a quick, easy and very worthwhile thing to do.
'76 Moto Guzzi 850 Le Mans