Brake light problem

[ratbyk]

Put a jumper wire to that "hot" black ground wire. Ground the other end of the jumper. If your lights then work properly you are back to what I said about 10 posts ago. Your problem is with the grounding of that circuit!
Ken/Sooke

[fredintoon]

accursed ground.

Hi Deo,
a Yamasignal acted up on me one time. You are right, the ground path from the bulb passes from the cast lamp housing to the hollow threaded attachment stud and then into the groundwire.
You'd think it impossible that mebbe an inch of thread engagement wouldn't conduct electricity, right? But I held a length of wire to the outside of that lamp and to the bike frame and, flash, flash flash! Screwed the hollow stud out, wire brushed & dielectric greased it & reassembled then the light was back in business.
Fred Hill, S'toon.