1957 TR3 , working fine a week ago but now....
OK...passenger side head lamp malfunctioning on dim...no
problem...replace passenger side head lamp... Wrong!!
On closer inspection dimmer filament (h4 bulb) is glowing, wiring
appears to be original, and while the cloth covering is frayed,
the rubber? insulation appears intact. As much of the wiring I can
check from the bucket back to the loom seems to be "period
Question is: Where do I start? replace the connector? check
voltages? check connectivity? "Tis a puzzlement"