Driver side low beam not working, Driver side low beam Options

[gspreeman]

Okay, no voltage to the driver side low beam. Checked the fuse, it's okay. Pulled out and swapped the relay, still nothing. What is my next step? I am guessing the headlight switch? What else could it be aside from a cut wire somewhere.

[oakdalecurtis]

Dave is spot on specific, as usual, but in a more general sense, I'll tell you the same thing I just told Gspree. Start by understanding and finding the wires for the fog lights, from the lights backwards. Use the electrical diagrams on this webpage to find the colors and endpoint of the wires.
http://www.pelicanparts.com/914/914_electrical_diagrams.htm
Start with the page called "Current Flow Diagram 1974", about halfway down the page. Go through all six pages, they list part names, wire colors and endpoints. Find the fog light wiring, note the wire colors, and start at your fog lights going backwards. When you understand these diagrams, you can fix almost any electrical item in your car. Use a small battery and a test light with probe to make a simple continuity checker. Check each wire as you find it at each end to make sure you are getting current through it. I just got my fog lamps up and running, used a light up amber toggle switch to run them. I rewired them to bypass the lights switch and high beam block, so now I can use them as daytime running lights independent of the headlights at all.