[namba209]

I guess now would be a good time for you to get one of J. J. Wheatley's DESTEC schematics. It is a 14" X 22" color coded, plastic laminated, piece of art, and will assist you greatly in chasing down any electrical problems you have or may encounter. Back to your question, where did you source the "power" lead for your new toggle switch? The 4 studs in the center of the fuse panel are "hot all the time" and are not fused. They are directly connected to the battey, alternator and ammeter. The original Yellow/Black wire should go to a microswitch in the Driver's side headlight bucket, which gets power when the key is on. When the headlights are open and locked, the microswitch puts power to the headlight relay, which puts power from one of the 4 studs to all the lights, bypassing the parking lite switch. To see if the parking lite switch is powering the headlights, you can pull the red connector in the fuse panel, that takes the parking lite switch output, fuel gage, temp gage, and oil gage out of the circuits. Then use your toggle switch to see if it is powering the relay. HTH.