I am getting about 0.03 V at the low beam socket for the drivers side low beam light when I turn on the headlights, should be 12V. The 15 A fuse for the light is good. The high beams work. The passenger low beam works. When I turn the lights on I hear an audible click which seems to be coming from the headlight relay in the engine compartment fuse block, and I get 12V at the low beam fuses.

What am I missing? Could the relay still be faulty if the passenger light comes on but the drivers does not? I have the correct bulb in the socket - it was working 2 days ago. Now no power. Need help.

 

Sounds like you have a wiring issue. Check the wires coming from the headlight and see if visually you have any breaks.

Does the socket have any corrosion?

Also, what year is your car again?

 

I am leaning towards a loose or broken wire as you suggest, and will be pursueing that angle. My car is a '98. No corrosion in the socket or at the relay. The wires behind the socket show the same voltage as the pins in the socket so the socket seems to be good.