Join Date: Jul 2013
Location: Gatton, Queensland, Australia
That is a great place to start looking. On the left side of the steering head is a large white multi-plug at the end of the main harness.
Look there first for any corroded contacts. Then check any other connections you can find. Your problem is most likely a corroded connection or switch. This is more likely if the bike is stored outside or sees the rain more often.
BTW this is a guess as we do not know which bike you have, or how old it is. PLEASE update your UserCP to show 650/1000 and age in your signature or profile.
2010 Weestrom; 2017 Kawasaki Versys-X300; 1988 Suzuki GSXR1100