I had a flickering in my low beam but high beam was OK, checked the wiring and the horn wires had rubbed and worn through the insulation, re taped and I thought all was ok. issue started again and I finally found that the plug on the actual lamp had been shorting and the plug had melted. when ever the bars were slightly turned the lamp would short out. Ended up cutting the melted bit of the plug off and crimped a new spade bit connector and insulation. Problem solved. But it was not obvious and it took me over 6 months to finally track down the issue. I just kept poking the wiring til I could replicate the problem