I know things... A lot of things.
Join Date: Feb 2015
Motorcycle: GSXR 750 K4
Re: Neutral Light Not Working
If you trace the wiring diagram in your manual, you'll see that a Bl/B wire goes from the neutral indicator to the turn signal/sidestand relay, through a diode therein and from there emerges as a Bl wire going to the neutral switch. You should be able to use a DMM in diode mode, to check the diode in the relay. Placing the probes on the Bl/B and Bl wire pins, you should be getting something like 500-700 (0.5V-0.7V) if you connect them one way and nothing if you connect them the other way.