Let me start by saying ‘«£Yes, I have searched this and other forums as well as other internet searches and have yet to find a similar situation.
2000 R11RT-P with ~70K on the clock. Ohlins (<3K miles front and rear), HID Headlight, Two Brothers CAT Eliminator, Power Commander III (Dyno tuned), New PR3s, CeeBailey Tall screen, Rick Mayer seat, Heavy Throttlemiesters, Cramp Buster.
Problem: Upper ABS Light does not come on during start-up self check (or any other time). Lower light acts normally for properly functioning ABS. (Flashes on first turning on ignition and extinguishes once bike starts moving) No maintenance performed between time when ABS indicators worked properly and this condition.
Troubleshooting To Date:
Replaced light bulb with known good bulb. Light does not come on/flash when ignition turned on. Put known good bulb back in position, works properly. Repeated same with proper new bulb. Light does not flash.
Attempted reset of ABS system using both the count to 8 and waiting full minute when depressing the ABS dash switch procedure. Upper light never comes on, lower light goes solid during procedure. After procedure and cycling ignition switch off then back on, lower light flashes normally.
Have performed fault code check using both 12V LED and analog VOM. LED comes on solid (no flashes) and VOM does not pulse.
Reseated all fuses in box under seat.
Battery is old but starts bike right up and stays on tender (Optimate 4) for ~one week each month. (I cycle the tender between 3 bikes, antique car, and standby generator.)
I am thinking it is just a fluke between the system and the bulb based on no fault codes and the lower light extinguishes when the bike gets underway. Any thoughts? I am getting ready to put her up for sale and want to be able to somewhat intelligently discuss this issue with potential buyers