i have a 2013 Ecoboost Screw. This morning, I was leaving for work about 0445, and was pulling out of my driveway, when I realized my headlights were not on. I tried rotating the switch a few times off and on, and still nothing. I pulled back in my driveway and checked all fuses for headlights, both low beams and high beams. All good. My parking lights, turn signals, and tail lights all work.

When I got home from work tonight, I tried a few more things. I pulled the lamp housing and checked for voltage directly to the bulb. I get 0.9 VDC at one pin and 0 VDC at the other two. Not nearly enough to fire up a bulb. To a known good ground.

I opened the dashboard to check the harness at the switch itself, and when I unplugged it, all lights turned on (except the headlights). Is that a failsafe in case the switch goes out while driving?

As a last ditch desperate measure, I disconnected my negative battery terminal for about 15 minutes just to see if anything changed. I don't know where else to go from here.

 

Did you flip your hi/low switch to see if the highs came on?

 

I flipped hi lo multiple times. No lights at all. I also threw new bulbs at it today as well.

 

So, update. I now have left side low beam and both high beams, after just replacing both the low beam fuses on a whim. But, now I have no fog lights, when I had them the night before. I tried swapping the headlight bulbs between the two sides just to double check the bulbs, and it's the same scenario. Left low beam, no right low beam, and both high beams

 

yes that was done