Is it just main beam that's missing, or have you lost dip beam as well?
If both are gone, as side lights are working (direct power from dash switch), there may also be a connection issue in the feed between dash switch and column switch
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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