http://www.partzilla.com/parts/search/Honda/Motorcycle/1999/GL1500CT+A/BATTERY/parts.htmlLook here, do you see what you're talking about?
#12 is the main fuse assembly. That's what you say is good?
Have you checked the battery for charge and cables for being connected right?
What you need is a volt meter and a shop manual and to go through all the wiring starting at the battery.
It's possible the new ignition switch is defective, but I doubt that. You can check it with a volt meter.
Also, try unplugging the new ignition and check the male and female connections making sure one isn't messed up or corroded.
See if a neighbor will take in YOUR bike, so it doesn't get violated
