I did the engine in my 93 K1100RS and it runs most awesome. I had an ABS I problem that turned out to be the controller. Here is the thing, I can get everything to work but not at the same time.
My gauges work fine with fuse #1, the top fuse in but the ABS doesn't. If I pull fuse #1, the ABS works great but no gauges.
I can't find a wiring diagram that integrates the chassis electrics with the ABS circuitry. I am pretty certain that the wiring, grounds, etc. are all good but what I can't find is if there are any components, relays or whatever that are common to both circuits.
Short of tearing the bike down again and stripping the harnesses open to trace every wire, I don't know where else to look.