Quote:
Originally Posted by BDR530
It is a dual filament bulb but both filaments look good. I'll check the ground tonight.
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"Looking good" is
not a test of functionality. Hold the base of the bulb securely and tap the bulb and see if either filaments "wiggle". Or swap the bulb to the other side and see what happens. If the bulb is OK on the other side, it could be the bad ground as CHANMADD mentioned. Also check for corrosion on the spring loaded terminals in the socket.